/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/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:34:00,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:34:00,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:34:00,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:34:00,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:34:00,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:34:00,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:34:00,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:34:00,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:34:00,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:34:00,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:34:00,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:34:00,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:34:00,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:34:00,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:34:00,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:34:00,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:34:00,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:34:00,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:34:00,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:34:00,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:34:00,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:34:00,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:34:00,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:34:00,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:34:00,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:34:00,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:34:00,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:34:00,320 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 06:34:00,343 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:34:00,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:34:00,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:34:00,348 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:34:00,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:34:00,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:34:00,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:34:00,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:34:00,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:34:00,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:34:00,351 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:34:00,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:34:00,351 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:34:00,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:34:00,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:34:00,352 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:34:00,352 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:34:00,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:34:00,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:34:00,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:34:00,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:34:00,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:34:00,353 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:34:00,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:34:00,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:34:00,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:34:00,779 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:34:00,780 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:34:00,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-11-07 06:34:00,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ea054035/5c01d330ac9c422d92370139e74a0a8a/FLAG2203673b6 [2020-11-07 06:34:01,483 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:34:01,483 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-11-07 06:34:01,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ea054035/5c01d330ac9c422d92370139e74a0a8a/FLAG2203673b6 [2020-11-07 06:34:01,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ea054035/5c01d330ac9c422d92370139e74a0a8a [2020-11-07 06:34:01,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:34:01,872 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:34:01,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:01,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:34:01,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:34:01,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:01" (1/1) ... [2020-11-07 06:34:01,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54f51957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:01, skipping insertion in model container [2020-11-07 06:34:01,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:01" (1/1) ... [2020-11-07 06:34:01,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:34:01,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:34:02,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:02,179 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:34:02,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:02,221 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:34:02,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:02 WrapperNode [2020-11-07 06:34:02,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:02,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:34:02,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:34:02,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:34:02,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:02" (1/1) ... [2020-11-07 06:34:02,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:02" (1/1) ... [2020-11-07 06:34:02,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:02" (1/1) ... [2020-11-07 06:34:02,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:02" (1/1) ... [2020-11-07 06:34:02,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:02" (1/1) ... [2020-11-07 06:34:02,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:02" (1/1) ... [2020-11-07 06:34:02,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:02" (1/1) ... [2020-11-07 06:34:02,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:34:02,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:34:02,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:34:02,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:34:02,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:02" (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 06:34:02,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:34:02,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:34:02,342 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:34:02,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:34:02,343 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-11-07 06:34:02,343 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:34:02,343 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 06:34:02,343 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:34:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:34:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 06:34:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 06:34:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:34:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:34:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:34:02,345 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-07 06:34:02,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 06:34:02,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 06:34:02,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:34:02,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 06:34:02,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:34:02,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:34:02,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:34:02,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:34:02,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:34:02,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:34:02,754 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:34:02,754 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-07 06:34:02,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:02 BoogieIcfgContainer [2020-11-07 06:34:02,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:34:02,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:34:02,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:34:02,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:34:02,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:34:01" (1/3) ... [2020-11-07 06:34:02,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23627aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:02, skipping insertion in model container [2020-11-07 06:34:02,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:02" (2/3) ... [2020-11-07 06:34:02,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23627aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:02, skipping insertion in model container [2020-11-07 06:34:02,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:02" (3/3) ... [2020-11-07 06:34:02,767 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-11-07 06:34:02,785 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:34:02,789 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:34:02,802 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:34:02,831 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:34:02,831 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:34:02,831 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:34:02,832 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:34:02,832 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:34:02,832 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:34:02,832 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:34:02,832 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:34:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-11-07 06:34:02,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-07 06:34:02,862 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:02,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:02,864 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:02,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:02,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1175551776, now seen corresponding path program 1 times [2020-11-07 06:34:02,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:02,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428755599] [2020-11-07 06:34:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:03,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:03,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:03,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:03,308 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 06:34:03,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428755599] [2020-11-07 06:34:03,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:03,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 06:34:03,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741945734] [2020-11-07 06:34:03,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 06:34:03,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:03,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 06:34:03,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:34:03,342 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 5 states. [2020-11-07 06:34:03,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:03,820 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2020-11-07 06:34:03,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 06:34:03,825 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-11-07 06:34:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:03,838 INFO L225 Difference]: With dead ends: 121 [2020-11-07 06:34:03,839 INFO L226 Difference]: Without dead ends: 74 [2020-11-07 06:34:03,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:34:03,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-07 06:34:03,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-11-07 06:34:03,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-07 06:34:03,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-11-07 06:34:03,937 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-11-07 06:34:03,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:03,938 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-11-07 06:34:03,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 06:34:03,939 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-11-07 06:34:03,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 06:34:03,941 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:03,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:03,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:34:03,944 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:03,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:03,949 INFO L82 PathProgramCache]: Analyzing trace with hash -69019303, now seen corresponding path program 1 times [2020-11-07 06:34:03,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:03,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363503690] [2020-11-07 06:34:03,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:04,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:04,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:04,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363503690] [2020-11-07 06:34:04,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:04,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-07 06:34:04,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57387319] [2020-11-07 06:34:04,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 06:34:04,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:04,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 06:34:04,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:34:04,221 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 7 states. [2020-11-07 06:34:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:04,484 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2020-11-07 06:34:04,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 06:34:04,485 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-11-07 06:34:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:04,487 INFO L225 Difference]: With dead ends: 100 [2020-11-07 06:34:04,487 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 06:34:04,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:34:04,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 06:34:04,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2020-11-07 06:34:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-07 06:34:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-11-07 06:34:04,503 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 42 [2020-11-07 06:34:04,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:04,503 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-11-07 06:34:04,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 06:34:04,504 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-11-07 06:34:04,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-07 06:34:04,506 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:04,506 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:04,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:34:04,506 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:04,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:04,507 INFO L82 PathProgramCache]: Analyzing trace with hash -532040000, now seen corresponding path program 2 times [2020-11-07 06:34:04,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:04,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53601093] [2020-11-07 06:34:04,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:04,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:04,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:04,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53601093] [2020-11-07 06:34:04,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:04,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 06:34:04,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343134639] [2020-11-07 06:34:04,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 06:34:04,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:04,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 06:34:04,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:34:04,743 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 7 states. [2020-11-07 06:34:05,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:05,109 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2020-11-07 06:34:05,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 06:34:05,110 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-11-07 06:34:05,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:05,111 INFO L225 Difference]: With dead ends: 109 [2020-11-07 06:34:05,112 INFO L226 Difference]: Without dead ends: 70 [2020-11-07 06:34:05,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-11-07 06:34:05,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-07 06:34:05,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-11-07 06:34:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-07 06:34:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-11-07 06:34:05,124 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 49 [2020-11-07 06:34:05,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:05,125 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-11-07 06:34:05,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 06:34:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-11-07 06:34:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-07 06:34:05,127 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:05,127 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:05,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:34:05,127 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:05,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:05,128 INFO L82 PathProgramCache]: Analyzing trace with hash -661502084, now seen corresponding path program 1 times [2020-11-07 06:34:05,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:05,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975731188] [2020-11-07 06:34:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:05,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:05,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:05,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975731188] [2020-11-07 06:34:05,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:05,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-07 06:34:05,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848798201] [2020-11-07 06:34:05,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 06:34:05,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:05,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 06:34:05,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-07 06:34:05,363 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 9 states. [2020-11-07 06:34:05,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:05,731 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2020-11-07 06:34:05,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 06:34:05,732 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-11-07 06:34:05,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:05,733 INFO L225 Difference]: With dead ends: 115 [2020-11-07 06:34:05,734 INFO L226 Difference]: Without dead ends: 76 [2020-11-07 06:34:05,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-11-07 06:34:05,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-07 06:34:05,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-11-07 06:34:05,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-07 06:34:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-11-07 06:34:05,747 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2020-11-07 06:34:05,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:05,747 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-11-07 06:34:05,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 06:34:05,747 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-11-07 06:34:05,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-07 06:34:05,749 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:05,749 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:05,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:34:05,750 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:05,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:05,750 INFO L82 PathProgramCache]: Analyzing trace with hash -717071560, now seen corresponding path program 2 times [2020-11-07 06:34:05,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:05,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548298507] [2020-11-07 06:34:05,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:05,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:05,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:06,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548298507] [2020-11-07 06:34:06,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:06,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-07 06:34:06,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465935645] [2020-11-07 06:34:06,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 06:34:06,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:06,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 06:34:06,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-07 06:34:06,064 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 11 states. [2020-11-07 06:34:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:06,551 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2020-11-07 06:34:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 06:34:06,551 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-11-07 06:34:06,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:06,553 INFO L225 Difference]: With dead ends: 121 [2020-11-07 06:34:06,553 INFO L226 Difference]: Without dead ends: 82 [2020-11-07 06:34:06,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-11-07 06:34:06,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-07 06:34:06,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-11-07 06:34:06,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 06:34:06,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-11-07 06:34:06,568 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 61 [2020-11-07 06:34:06,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:06,569 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-11-07 06:34:06,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 06:34:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-11-07 06:34:06,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-07 06:34:06,570 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:06,571 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:06,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:34:06,571 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:06,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:06,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2104209908, now seen corresponding path program 3 times [2020-11-07 06:34:06,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:06,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756500862] [2020-11-07 06:34:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:06,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:06,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:06,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756500862] [2020-11-07 06:34:06,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:06,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-07 06:34:06,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873287408] [2020-11-07 06:34:06,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-07 06:34:06,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:06,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-07 06:34:06,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-07 06:34:06,986 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 13 states. [2020-11-07 06:34:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:07,511 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2020-11-07 06:34:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 06:34:07,512 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-11-07 06:34:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:07,514 INFO L225 Difference]: With dead ends: 127 [2020-11-07 06:34:07,515 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 06:34:07,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-11-07 06:34:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 06:34:07,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-11-07 06:34:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-07 06:34:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-11-07 06:34:07,531 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 67 [2020-11-07 06:34:07,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:07,532 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-11-07 06:34:07,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-07 06:34:07,532 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-11-07 06:34:07,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-11-07 06:34:07,533 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:07,534 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:07,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 06:34:07,534 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:07,535 INFO L82 PathProgramCache]: Analyzing trace with hash -741340240, now seen corresponding path program 4 times [2020-11-07 06:34:07,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:07,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254671760] [2020-11-07 06:34:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:07,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:07,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:08,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254671760] [2020-11-07 06:34:08,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:08,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-11-07 06:34:08,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394014220] [2020-11-07 06:34:08,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 06:34:08,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:08,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 06:34:08,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-07 06:34:08,066 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 15 states. [2020-11-07 06:34:08,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:08,688 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2020-11-07 06:34:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 06:34:08,688 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-11-07 06:34:08,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:08,693 INFO L225 Difference]: With dead ends: 133 [2020-11-07 06:34:08,693 INFO L226 Difference]: Without dead ends: 94 [2020-11-07 06:34:08,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-11-07 06:34:08,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-07 06:34:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-11-07 06:34:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-07 06:34:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-11-07 06:34:08,722 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 73 [2020-11-07 06:34:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:08,722 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-11-07 06:34:08,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 06:34:08,722 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-11-07 06:34:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-07 06:34:08,724 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:08,724 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:08,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 06:34:08,725 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:08,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1293866900, now seen corresponding path program 5 times [2020-11-07 06:34:08,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:08,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717358209] [2020-11-07 06:34:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:09,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717358209] [2020-11-07 06:34:09,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:09,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-11-07 06:34:09,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786473492] [2020-11-07 06:34:09,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 06:34:09,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:09,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 06:34:09,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-11-07 06:34:09,294 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 17 states. [2020-11-07 06:34:09,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:09,967 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2020-11-07 06:34:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 06:34:09,968 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-11-07 06:34:09,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:09,970 INFO L225 Difference]: With dead ends: 139 [2020-11-07 06:34:09,971 INFO L226 Difference]: Without dead ends: 100 [2020-11-07 06:34:09,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-11-07 06:34:09,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-07 06:34:09,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-11-07 06:34:09,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-07 06:34:09,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-11-07 06:34:09,990 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 79 [2020-11-07 06:34:09,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:09,991 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-11-07 06:34:09,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 06:34:09,991 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-11-07 06:34:09,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-07 06:34:09,992 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:09,993 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:09,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 06:34:09,993 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:09,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:09,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1220593704, now seen corresponding path program 6 times [2020-11-07 06:34:09,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:09,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015364915] [2020-11-07 06:34:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:10,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:10,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:10,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015364915] [2020-11-07 06:34:10,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:10,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-11-07 06:34:10,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433133000] [2020-11-07 06:34:10,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-07 06:34:10,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:10,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-07 06:34:10,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-11-07 06:34:10,656 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 19 states. [2020-11-07 06:34:11,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:11,423 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2020-11-07 06:34:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 06:34:11,424 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-11-07 06:34:11,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:11,426 INFO L225 Difference]: With dead ends: 145 [2020-11-07 06:34:11,426 INFO L226 Difference]: Without dead ends: 106 [2020-11-07 06:34:11,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 06:34:11,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-07 06:34:11,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-11-07 06:34:11,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-07 06:34:11,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-11-07 06:34:11,464 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 85 [2020-11-07 06:34:11,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:11,465 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-11-07 06:34:11,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-07 06:34:11,465 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-11-07 06:34:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-07 06:34:11,468 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:11,469 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:11,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 06:34:11,472 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:11,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1824478492, now seen corresponding path program 7 times [2020-11-07 06:34:11,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:11,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185337361] [2020-11-07 06:34:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:11,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:11,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:12,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185337361] [2020-11-07 06:34:12,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:12,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-11-07 06:34:12,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582796739] [2020-11-07 06:34:12,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-07 06:34:12,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:12,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-07 06:34:12,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-11-07 06:34:12,269 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 21 states. [2020-11-07 06:34:13,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:13,109 INFO L93 Difference]: Finished difference Result 151 states and 161 transitions. [2020-11-07 06:34:13,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 06:34:13,110 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2020-11-07 06:34:13,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:13,111 INFO L225 Difference]: With dead ends: 151 [2020-11-07 06:34:13,111 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 06:34:13,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 06:34:13,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 06:34:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-11-07 06:34:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-07 06:34:13,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-11-07 06:34:13,148 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 91 [2020-11-07 06:34:13,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:13,148 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-11-07 06:34:13,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-07 06:34:13,149 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-11-07 06:34:13,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-07 06:34:13,150 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:13,155 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:13,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 06:34:13,156 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:13,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:13,156 INFO L82 PathProgramCache]: Analyzing trace with hash -605908832, now seen corresponding path program 8 times [2020-11-07 06:34:13,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:13,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500339592] [2020-11-07 06:34:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:13,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:13,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:14,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500339592] [2020-11-07 06:34:14,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:14,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-11-07 06:34:14,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143631042] [2020-11-07 06:34:14,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 06:34:14,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:14,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 06:34:14,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-11-07 06:34:14,101 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 23 states. [2020-11-07 06:34:15,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:15,094 INFO L93 Difference]: Finished difference Result 157 states and 167 transitions. [2020-11-07 06:34:15,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 06:34:15,102 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 97 [2020-11-07 06:34:15,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:15,104 INFO L225 Difference]: With dead ends: 157 [2020-11-07 06:34:15,104 INFO L226 Difference]: Without dead ends: 118 [2020-11-07 06:34:15,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 06:34:15,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-07 06:34:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-11-07 06:34:15,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-07 06:34:15,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-11-07 06:34:15,124 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 97 [2020-11-07 06:34:15,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:15,126 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-11-07 06:34:15,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 06:34:15,126 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-11-07 06:34:15,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-07 06:34:15,127 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:15,128 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:15,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 06:34:15,128 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:15,129 INFO L82 PathProgramCache]: Analyzing trace with hash 869808476, now seen corresponding path program 9 times [2020-11-07 06:34:15,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:15,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77436398] [2020-11-07 06:34:15,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:15,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:15,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:16,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77436398] [2020-11-07 06:34:16,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:16,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-11-07 06:34:16,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818367903] [2020-11-07 06:34:16,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 06:34:16,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:16,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 06:34:16,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-11-07 06:34:16,140 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 25 states. [2020-11-07 06:34:17,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:17,258 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2020-11-07 06:34:17,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 06:34:17,259 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 103 [2020-11-07 06:34:17,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:17,260 INFO L225 Difference]: With dead ends: 163 [2020-11-07 06:34:17,260 INFO L226 Difference]: Without dead ends: 124 [2020-11-07 06:34:17,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=611, Invalid=1551, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 06:34:17,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-07 06:34:17,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-11-07 06:34:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-07 06:34:17,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-11-07 06:34:17,273 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 103 [2020-11-07 06:34:17,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:17,273 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-11-07 06:34:17,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 06:34:17,273 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-11-07 06:34:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-11-07 06:34:17,278 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:17,279 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:17,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 06:34:17,280 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:17,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:17,280 INFO L82 PathProgramCache]: Analyzing trace with hash -268212968, now seen corresponding path program 10 times [2020-11-07 06:34:17,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:17,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524022681] [2020-11-07 06:34:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:17,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:17,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:18,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524022681] [2020-11-07 06:34:18,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:18,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-11-07 06:34:18,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553775059] [2020-11-07 06:34:18,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 06:34:18,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:18,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 06:34:18,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-11-07 06:34:18,448 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 27 states. [2020-11-07 06:34:19,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:19,789 INFO L93 Difference]: Finished difference Result 169 states and 179 transitions. [2020-11-07 06:34:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 06:34:19,796 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 109 [2020-11-07 06:34:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:19,797 INFO L225 Difference]: With dead ends: 169 [2020-11-07 06:34:19,797 INFO L226 Difference]: Without dead ends: 130 [2020-11-07 06:34:19,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=725, Invalid=1825, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 06:34:19,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-07 06:34:19,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-11-07 06:34:19,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-07 06:34:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-11-07 06:34:19,814 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 109 [2020-11-07 06:34:19,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:19,814 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-11-07 06:34:19,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 06:34:19,814 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-11-07 06:34:19,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 06:34:19,815 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:19,815 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:19,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 06:34:19,816 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:19,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:19,817 INFO L82 PathProgramCache]: Analyzing trace with hash 620090324, now seen corresponding path program 11 times [2020-11-07 06:34:19,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:19,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637614520] [2020-11-07 06:34:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:19,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:19,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:20,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637614520] [2020-11-07 06:34:20,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:20,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-11-07 06:34:20,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996486274] [2020-11-07 06:34:20,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 06:34:20,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:20,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 06:34:20,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-11-07 06:34:20,959 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 29 states. [2020-11-07 06:34:22,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:22,326 INFO L93 Difference]: Finished difference Result 175 states and 185 transitions. [2020-11-07 06:34:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 06:34:22,326 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-11-07 06:34:22,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:22,327 INFO L225 Difference]: With dead ends: 175 [2020-11-07 06:34:22,328 INFO L226 Difference]: Without dead ends: 136 [2020-11-07 06:34:22,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=849, Invalid=2121, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 06:34:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-11-07 06:34:22,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-11-07 06:34:22,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-07 06:34:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-11-07 06:34:22,349 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 115 [2020-11-07 06:34:22,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:22,350 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-11-07 06:34:22,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 06:34:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-11-07 06:34:22,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-07 06:34:22,351 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:22,351 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:22,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 06:34:22,352 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:22,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:22,352 INFO L82 PathProgramCache]: Analyzing trace with hash 586237328, now seen corresponding path program 12 times [2020-11-07 06:34:22,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:22,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288935331] [2020-11-07 06:34:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:22,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:22,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:23,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288935331] [2020-11-07 06:34:23,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:23,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-11-07 06:34:23,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895281674] [2020-11-07 06:34:23,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 06:34:23,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:23,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 06:34:23,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-11-07 06:34:23,670 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 31 states. [2020-11-07 06:34:25,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:25,316 INFO L93 Difference]: Finished difference Result 181 states and 191 transitions. [2020-11-07 06:34:25,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 06:34:25,317 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2020-11-07 06:34:25,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:25,319 INFO L225 Difference]: With dead ends: 181 [2020-11-07 06:34:25,319 INFO L226 Difference]: Without dead ends: 142 [2020-11-07 06:34:25,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=983, Invalid=2439, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 06:34:25,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-11-07 06:34:25,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-11-07 06:34:25,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-11-07 06:34:25,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-11-07 06:34:25,339 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2020-11-07 06:34:25,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:25,340 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-11-07 06:34:25,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 06:34:25,340 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-11-07 06:34:25,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-11-07 06:34:25,341 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:25,342 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:25,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 06:34:25,342 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:25,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:25,343 INFO L82 PathProgramCache]: Analyzing trace with hash -236488116, now seen corresponding path program 13 times [2020-11-07 06:34:25,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:25,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297465413] [2020-11-07 06:34:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:25,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:25,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:26,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297465413] [2020-11-07 06:34:26,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:26,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-11-07 06:34:26,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791210350] [2020-11-07 06:34:26,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 06:34:26,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:26,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 06:34:26,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 06:34:26,694 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 33 states. [2020-11-07 06:34:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:28,352 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2020-11-07 06:34:28,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-07 06:34:28,353 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 127 [2020-11-07 06:34:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:28,354 INFO L225 Difference]: With dead ends: 187 [2020-11-07 06:34:28,355 INFO L226 Difference]: Without dead ends: 148 [2020-11-07 06:34:28,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1127, Invalid=2779, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 06:34:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-07 06:34:28,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-11-07 06:34:28,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-07 06:34:28,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-11-07 06:34:28,371 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 127 [2020-11-07 06:34:28,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:28,372 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-11-07 06:34:28,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 06:34:28,372 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-11-07 06:34:28,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-11-07 06:34:28,373 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:28,373 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:28,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 06:34:28,373 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:28,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:28,374 INFO L82 PathProgramCache]: Analyzing trace with hash -847629816, now seen corresponding path program 14 times [2020-11-07 06:34:28,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:28,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832145474] [2020-11-07 06:34:28,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:28,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:28,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:30,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832145474] [2020-11-07 06:34:30,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:30,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-11-07 06:34:30,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971338401] [2020-11-07 06:34:30,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 06:34:30,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:30,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 06:34:30,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 06:34:30,133 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 35 states. [2020-11-07 06:34:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:32,288 INFO L93 Difference]: Finished difference Result 193 states and 203 transitions. [2020-11-07 06:34:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-07 06:34:32,289 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2020-11-07 06:34:32,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:32,291 INFO L225 Difference]: With dead ends: 193 [2020-11-07 06:34:32,291 INFO L226 Difference]: Without dead ends: 154 [2020-11-07 06:34:32,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1281, Invalid=3141, Unknown=0, NotChecked=0, Total=4422 [2020-11-07 06:34:32,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-07 06:34:32,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-11-07 06:34:32,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-11-07 06:34:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-11-07 06:34:32,309 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 133 [2020-11-07 06:34:32,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:32,310 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-11-07 06:34:32,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 06:34:32,310 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-11-07 06:34:32,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-11-07 06:34:32,312 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:32,312 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:32,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 06:34:32,312 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:32,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:32,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1594151740, now seen corresponding path program 15 times [2020-11-07 06:34:32,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:32,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868457208] [2020-11-07 06:34:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:32,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:32,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 645 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:34,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868457208] [2020-11-07 06:34:34,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:34,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-11-07 06:34:34,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333974106] [2020-11-07 06:34:34,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 06:34:34,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:34,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 06:34:34,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 06:34:34,080 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 37 states. [2020-11-07 06:34:36,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:36,376 INFO L93 Difference]: Finished difference Result 199 states and 209 transitions. [2020-11-07 06:34:36,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-07 06:34:36,376 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 139 [2020-11-07 06:34:36,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:36,377 INFO L225 Difference]: With dead ends: 199 [2020-11-07 06:34:36,378 INFO L226 Difference]: Without dead ends: 160 [2020-11-07 06:34:36,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1445, Invalid=3525, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 06:34:36,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-07 06:34:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-11-07 06:34:36,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-11-07 06:34:36,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-11-07 06:34:36,405 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 139 [2020-11-07 06:34:36,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:36,406 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-11-07 06:34:36,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 06:34:36,406 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-11-07 06:34:36,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 06:34:36,407 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:36,408 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:36,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 06:34:36,408 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:36,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:36,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2090063232, now seen corresponding path program 16 times [2020-11-07 06:34:36,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:36,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697268028] [2020-11-07 06:34:36,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:36,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:36,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 736 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:38,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697268028] [2020-11-07 06:34:38,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:38,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-11-07 06:34:38,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010311559] [2020-11-07 06:34:38,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 06:34:38,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:38,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 06:34:38,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 06:34:38,421 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 39 states. [2020-11-07 06:34:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:40,683 INFO L93 Difference]: Finished difference Result 205 states and 215 transitions. [2020-11-07 06:34:40,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-11-07 06:34:40,684 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 145 [2020-11-07 06:34:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:40,687 INFO L225 Difference]: With dead ends: 205 [2020-11-07 06:34:40,687 INFO L226 Difference]: Without dead ends: 166 [2020-11-07 06:34:40,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1619, Invalid=3931, Unknown=0, NotChecked=0, Total=5550 [2020-11-07 06:34:40,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-11-07 06:34:40,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-11-07 06:34:40,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-11-07 06:34:40,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2020-11-07 06:34:40,707 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 145 [2020-11-07 06:34:40,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:40,708 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2020-11-07 06:34:40,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 06:34:40,708 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2020-11-07 06:34:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-11-07 06:34:40,710 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:40,710 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:40,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 06:34:40,710 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:40,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:40,711 INFO L82 PathProgramCache]: Analyzing trace with hash 863955772, now seen corresponding path program 17 times [2020-11-07 06:34:40,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:40,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868452435] [2020-11-07 06:34:40,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:40,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:40,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 833 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:42,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868452435] [2020-11-07 06:34:42,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:42,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-11-07 06:34:42,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574382693] [2020-11-07 06:34:42,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 06:34:42,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:42,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 06:34:42,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 06:34:42,870 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand 41 states. [2020-11-07 06:34:45,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:45,207 INFO L93 Difference]: Finished difference Result 211 states and 221 transitions. [2020-11-07 06:34:45,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-07 06:34:45,207 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 151 [2020-11-07 06:34:45,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:45,209 INFO L225 Difference]: With dead ends: 211 [2020-11-07 06:34:45,209 INFO L226 Difference]: Without dead ends: 172 [2020-11-07 06:34:45,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1803, Invalid=4359, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 06:34:45,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-11-07 06:34:45,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-11-07 06:34:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-11-07 06:34:45,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-11-07 06:34:45,240 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 151 [2020-11-07 06:34:45,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:45,240 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-11-07 06:34:45,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 06:34:45,241 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-11-07 06:34:45,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-07 06:34:45,242 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:45,243 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:45,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 06:34:45,243 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:45,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:45,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1818939656, now seen corresponding path program 18 times [2020-11-07 06:34:45,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:45,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021543344] [2020-11-07 06:34:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:45,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:45,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 936 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:47,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021543344] [2020-11-07 06:34:47,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:47,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-11-07 06:34:47,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830598139] [2020-11-07 06:34:47,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-07 06:34:47,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:47,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-07 06:34:47,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 06:34:47,746 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 43 states. [2020-11-07 06:34:50,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:50,387 INFO L93 Difference]: Finished difference Result 217 states and 227 transitions. [2020-11-07 06:34:50,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-07 06:34:50,388 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 157 [2020-11-07 06:34:50,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:50,390 INFO L225 Difference]: With dead ends: 217 [2020-11-07 06:34:50,390 INFO L226 Difference]: Without dead ends: 178 [2020-11-07 06:34:50,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1997, Invalid=4809, Unknown=0, NotChecked=0, Total=6806 [2020-11-07 06:34:50,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-07 06:34:50,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-11-07 06:34:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-11-07 06:34:50,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 179 transitions. [2020-11-07 06:34:50,416 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 179 transitions. Word has length 157 [2020-11-07 06:34:50,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:50,417 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 179 transitions. [2020-11-07 06:34:50,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-07 06:34:50,417 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 179 transitions. [2020-11-07 06:34:50,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-11-07 06:34:50,419 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:50,419 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:50,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 06:34:50,419 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:50,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:50,420 INFO L82 PathProgramCache]: Analyzing trace with hash 633386420, now seen corresponding path program 19 times [2020-11-07 06:34:50,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:50,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093712854] [2020-11-07 06:34:50,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:50,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:50,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 1045 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:52,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093712854] [2020-11-07 06:34:52,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:52,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-11-07 06:34:52,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032044847] [2020-11-07 06:34:52,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-07 06:34:52,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:52,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-07 06:34:52,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 06:34:52,967 INFO L87 Difference]: Start difference. First operand 174 states and 179 transitions. Second operand 45 states. [2020-11-07 06:34:55,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:55,801 INFO L93 Difference]: Finished difference Result 223 states and 233 transitions. [2020-11-07 06:34:55,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-11-07 06:34:55,805 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 163 [2020-11-07 06:34:55,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:55,806 INFO L225 Difference]: With dead ends: 223 [2020-11-07 06:34:55,806 INFO L226 Difference]: Without dead ends: 184 [2020-11-07 06:34:55,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2201, Invalid=5281, Unknown=0, NotChecked=0, Total=7482 [2020-11-07 06:34:55,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-11-07 06:34:55,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2020-11-07 06:34:55,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-11-07 06:34:55,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 185 transitions. [2020-11-07 06:34:55,833 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 185 transitions. Word has length 163 [2020-11-07 06:34:55,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:55,833 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 185 transitions. [2020-11-07 06:34:55,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-07 06:34:55,833 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 185 transitions. [2020-11-07 06:34:55,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-11-07 06:34:55,835 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:55,835 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:55,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 06:34:55,836 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:55,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:55,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2017247376, now seen corresponding path program 20 times [2020-11-07 06:34:55,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:55,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462544484] [2020-11-07 06:34:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:55,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:55,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:55,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 1160 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:58,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462544484] [2020-11-07 06:34:58,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:58,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-11-07 06:34:58,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958547448] [2020-11-07 06:34:58,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-07 06:34:58,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:58,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-07 06:34:58,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 06:34:58,705 INFO L87 Difference]: Start difference. First operand 180 states and 185 transitions. Second operand 47 states. [2020-11-07 06:35:01,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:01,886 INFO L93 Difference]: Finished difference Result 229 states and 239 transitions. [2020-11-07 06:35:01,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-11-07 06:35:01,887 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 169 [2020-11-07 06:35:01,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:01,889 INFO L225 Difference]: With dead ends: 229 [2020-11-07 06:35:01,889 INFO L226 Difference]: Without dead ends: 190 [2020-11-07 06:35:01,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2415, Invalid=5775, Unknown=0, NotChecked=0, Total=8190 [2020-11-07 06:35:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-11-07 06:35:01,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-11-07 06:35:01,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-11-07 06:35:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2020-11-07 06:35:01,921 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 169 [2020-11-07 06:35:01,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:01,922 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2020-11-07 06:35:01,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-07 06:35:01,922 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2020-11-07 06:35:01,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-07 06:35:01,923 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:01,923 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:01,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 06:35:01,923 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:01,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:01,924 INFO L82 PathProgramCache]: Analyzing trace with hash -284259284, now seen corresponding path program 21 times [2020-11-07 06:35:01,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:01,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144656409] [2020-11-07 06:35:01,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:02,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:02,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:35:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 0 proven. 1281 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:05,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144656409] [2020-11-07 06:35:05,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:05,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-11-07 06:35:05,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271394757] [2020-11-07 06:35:05,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-11-07 06:35:05,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:05,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-11-07 06:35:05,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2020-11-07 06:35:05,054 INFO L87 Difference]: Start difference. First operand 186 states and 191 transitions. Second operand 49 states. [2020-11-07 06:35:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:08,353 INFO L93 Difference]: Finished difference Result 235 states and 245 transitions. [2020-11-07 06:35:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-07 06:35:08,354 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 175 [2020-11-07 06:35:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:08,356 INFO L225 Difference]: With dead ends: 235 [2020-11-07 06:35:08,356 INFO L226 Difference]: Without dead ends: 196 [2020-11-07 06:35:08,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2639, Invalid=6291, Unknown=0, NotChecked=0, Total=8930 [2020-11-07 06:35:08,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-11-07 06:35:08,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-11-07 06:35:08,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-11-07 06:35:08,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 197 transitions. [2020-11-07 06:35:08,380 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 197 transitions. Word has length 175 [2020-11-07 06:35:08,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:08,380 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 197 transitions. [2020-11-07 06:35:08,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-11-07 06:35:08,380 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 197 transitions. [2020-11-07 06:35:08,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-11-07 06:35:08,381 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:08,381 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:08,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 06:35:08,381 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:08,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:08,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1530635288, now seen corresponding path program 22 times [2020-11-07 06:35:08,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:08,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645066605] [2020-11-07 06:35:08,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:08,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:08,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:35:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 0 proven. 1408 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:11,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645066605] [2020-11-07 06:35:11,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:11,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-11-07 06:35:11,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371062867] [2020-11-07 06:35:11,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-11-07 06:35:11,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:11,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-11-07 06:35:11,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1922, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 06:35:11,782 INFO L87 Difference]: Start difference. First operand 192 states and 197 transitions. Second operand 51 states. [2020-11-07 06:35:15,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:15,493 INFO L93 Difference]: Finished difference Result 241 states and 251 transitions. [2020-11-07 06:35:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-07 06:35:15,494 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 181 [2020-11-07 06:35:15,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:15,496 INFO L225 Difference]: With dead ends: 241 [2020-11-07 06:35:15,496 INFO L226 Difference]: Without dead ends: 202 [2020-11-07 06:35:15,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2873, Invalid=6829, Unknown=0, NotChecked=0, Total=9702 [2020-11-07 06:35:15,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-11-07 06:35:15,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2020-11-07 06:35:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-11-07 06:35:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2020-11-07 06:35:15,528 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 181 [2020-11-07 06:35:15,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:15,528 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2020-11-07 06:35:15,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-11-07 06:35:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2020-11-07 06:35:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-11-07 06:35:15,529 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:15,530 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:15,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 06:35:15,530 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:15,531 INFO L82 PathProgramCache]: Analyzing trace with hash -2118750556, now seen corresponding path program 23 times [2020-11-07 06:35:15,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:15,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576649487] [2020-11-07 06:35:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:15,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:15,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:35:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1541 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:19,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576649487] [2020-11-07 06:35:19,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:19,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-11-07 06:35:19,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64279783] [2020-11-07 06:35:19,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-11-07 06:35:19,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:19,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-11-07 06:35:19,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=2077, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 06:35:19,073 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand 53 states. [2020-11-07 06:35:23,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:23,123 INFO L93 Difference]: Finished difference Result 247 states and 257 transitions. [2020-11-07 06:35:23,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-11-07 06:35:23,123 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 187 [2020-11-07 06:35:23,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:23,126 INFO L225 Difference]: With dead ends: 247 [2020-11-07 06:35:23,126 INFO L226 Difference]: Without dead ends: 208 [2020-11-07 06:35:23,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=3117, Invalid=7389, Unknown=0, NotChecked=0, Total=10506 [2020-11-07 06:35:23,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-07 06:35:23,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-11-07 06:35:23,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-11-07 06:35:23,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 209 transitions. [2020-11-07 06:35:23,163 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 209 transitions. Word has length 187 [2020-11-07 06:35:23,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:23,163 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 209 transitions. [2020-11-07 06:35:23,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-11-07 06:35:23,163 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 209 transitions. [2020-11-07 06:35:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-11-07 06:35:23,164 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:23,165 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:23,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 06:35:23,165 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:23,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:23,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1785103456, now seen corresponding path program 24 times [2020-11-07 06:35:23,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:23,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071253769] [2020-11-07 06:35:23,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:35:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1689 backedges. 0 proven. 1680 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:27,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071253769] [2020-11-07 06:35:27,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:27,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-11-07 06:35:27,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867547298] [2020-11-07 06:35:27,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-11-07 06:35:27,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:27,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-11-07 06:35:27,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=2238, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 06:35:27,125 INFO L87 Difference]: Start difference. First operand 204 states and 209 transitions. Second operand 55 states. [2020-11-07 06:35:31,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:31,501 INFO L93 Difference]: Finished difference Result 253 states and 263 transitions. [2020-11-07 06:35:31,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-11-07 06:35:31,502 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 193 [2020-11-07 06:35:31,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:31,505 INFO L225 Difference]: With dead ends: 253 [2020-11-07 06:35:31,505 INFO L226 Difference]: Without dead ends: 214 [2020-11-07 06:35:31,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=3371, Invalid=7971, Unknown=0, NotChecked=0, Total=11342 [2020-11-07 06:35:31,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-11-07 06:35:31,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2020-11-07 06:35:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-11-07 06:35:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 215 transitions. [2020-11-07 06:35:31,552 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 215 transitions. Word has length 193 [2020-11-07 06:35:31,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:31,553 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 215 transitions. [2020-11-07 06:35:31,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-11-07 06:35:31,553 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 215 transitions. [2020-11-07 06:35:31,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-11-07 06:35:31,554 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:31,555 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:31,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 06:35:31,555 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:31,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:31,555 INFO L82 PathProgramCache]: Analyzing trace with hash -888775396, now seen corresponding path program 25 times [2020-11-07 06:35:31,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:31,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401689928] [2020-11-07 06:35:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:31,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:31,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:35:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1834 backedges. 0 proven. 1825 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:35,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401689928] [2020-11-07 06:35:35,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:35,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-11-07 06:35:35,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166761039] [2020-11-07 06:35:35,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-11-07 06:35:35,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:35,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-11-07 06:35:35,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2020-11-07 06:35:35,654 INFO L87 Difference]: Start difference. First operand 210 states and 215 transitions. Second operand 57 states. [2020-11-07 06:35:40,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:40,177 INFO L93 Difference]: Finished difference Result 259 states and 269 transitions. [2020-11-07 06:35:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-11-07 06:35:40,178 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 199 [2020-11-07 06:35:40,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:40,180 INFO L225 Difference]: With dead ends: 259 [2020-11-07 06:35:40,180 INFO L226 Difference]: Without dead ends: 220 [2020-11-07 06:35:40,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=3635, Invalid=8575, Unknown=0, NotChecked=0, Total=12210 [2020-11-07 06:35:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-11-07 06:35:40,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2020-11-07 06:35:40,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-11-07 06:35:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2020-11-07 06:35:40,224 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 199 [2020-11-07 06:35:40,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:40,225 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2020-11-07 06:35:40,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-11-07 06:35:40,225 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2020-11-07 06:35:40,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-11-07 06:35:40,227 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:40,227 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:40,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 06:35:40,227 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:40,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:40,228 INFO L82 PathProgramCache]: Analyzing trace with hash 326613208, now seen corresponding path program 26 times [2020-11-07 06:35:40,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:40,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157222278] [2020-11-07 06:35:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:40,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:40,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:35:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1976 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:44,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157222278] [2020-11-07 06:35:44,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:44,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-11-07 06:35:44,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985112203] [2020-11-07 06:35:44,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-11-07 06:35:44,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:44,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-11-07 06:35:44,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=2578, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 06:35:44,877 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand 59 states. [2020-11-07 06:35:49,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:49,867 INFO L93 Difference]: Finished difference Result 265 states and 275 transitions. [2020-11-07 06:35:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-11-07 06:35:49,867 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 205 [2020-11-07 06:35:49,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:49,869 INFO L225 Difference]: With dead ends: 265 [2020-11-07 06:35:49,869 INFO L226 Difference]: Without dead ends: 226 [2020-11-07 06:35:49,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=3909, Invalid=9201, Unknown=0, NotChecked=0, Total=13110 [2020-11-07 06:35:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-07 06:35:49,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-11-07 06:35:49,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-11-07 06:35:49,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 227 transitions. [2020-11-07 06:35:49,909 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 227 transitions. Word has length 205 [2020-11-07 06:35:49,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:49,910 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 227 transitions. [2020-11-07 06:35:49,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-11-07 06:35:49,910 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 227 transitions. [2020-11-07 06:35:49,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-11-07 06:35:49,911 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:49,912 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:49,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 06:35:49,912 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:49,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:49,912 INFO L82 PathProgramCache]: Analyzing trace with hash 860641172, now seen corresponding path program 27 times [2020-11-07 06:35:49,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:49,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038559096] [2020-11-07 06:35:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:50,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:50,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:35:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2142 backedges. 0 proven. 2133 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:54,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038559096] [2020-11-07 06:35:54,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:54,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-11-07 06:35:54,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241788675] [2020-11-07 06:35:54,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-11-07 06:35:54,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:54,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-11-07 06:35:54,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=2757, Unknown=0, NotChecked=0, Total=3660 [2020-11-07 06:35:54,947 INFO L87 Difference]: Start difference. First operand 222 states and 227 transitions. Second operand 61 states. [2020-11-07 06:36:00,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:00,383 INFO L93 Difference]: Finished difference Result 271 states and 281 transitions. [2020-11-07 06:36:00,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-11-07 06:36:00,384 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 211 [2020-11-07 06:36:00,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:00,386 INFO L225 Difference]: With dead ends: 271 [2020-11-07 06:36:00,387 INFO L226 Difference]: Without dead ends: 232 [2020-11-07 06:36:00,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=4193, Invalid=9849, Unknown=0, NotChecked=0, Total=14042 [2020-11-07 06:36:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-11-07 06:36:00,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2020-11-07 06:36:00,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-11-07 06:36:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 233 transitions. [2020-11-07 06:36:00,432 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 233 transitions. Word has length 211 [2020-11-07 06:36:00,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:00,432 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 233 transitions. [2020-11-07 06:36:00,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-11-07 06:36:00,432 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 233 transitions. [2020-11-07 06:36:00,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-11-07 06:36:00,434 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:00,434 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:00,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 06:36:00,434 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:00,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:00,435 INFO L82 PathProgramCache]: Analyzing trace with hash 365295952, now seen corresponding path program 28 times [2020-11-07 06:36:00,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:00,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576006987] [2020-11-07 06:36:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:00,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:00,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:36:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 0 proven. 2296 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:36:05,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576006987] [2020-11-07 06:36:05,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:05,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-11-07 06:36:05,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965189883] [2020-11-07 06:36:05,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-07 06:36:05,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:05,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-07 06:36:05,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=2942, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 06:36:05,861 INFO L87 Difference]: Start difference. First operand 228 states and 233 transitions. Second operand 63 states. [2020-11-07 06:36:11,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:11,567 INFO L93 Difference]: Finished difference Result 277 states and 287 transitions. [2020-11-07 06:36:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-11-07 06:36:11,568 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 217 [2020-11-07 06:36:11,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:11,570 INFO L225 Difference]: With dead ends: 277 [2020-11-07 06:36:11,570 INFO L226 Difference]: Without dead ends: 238 [2020-11-07 06:36:11,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=4487, Invalid=10519, Unknown=0, NotChecked=0, Total=15006 [2020-11-07 06:36:11,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-11-07 06:36:11,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2020-11-07 06:36:11,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-11-07 06:36:11,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 239 transitions. [2020-11-07 06:36:11,613 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 239 transitions. Word has length 217 [2020-11-07 06:36:11,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:11,613 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 239 transitions. [2020-11-07 06:36:11,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-07 06:36:11,613 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 239 transitions. [2020-11-07 06:36:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-11-07 06:36:11,615 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:11,615 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:11,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 06:36:11,616 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:11,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:11,616 INFO L82 PathProgramCache]: Analyzing trace with hash 500588044, now seen corresponding path program 29 times [2020-11-07 06:36:11,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:11,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038002184] [2020-11-07 06:36:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:11,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:11,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:36:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 0 proven. 2465 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:36:17,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038002184] [2020-11-07 06:36:17,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:17,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-11-07 06:36:17,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138258557] [2020-11-07 06:36:17,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-11-07 06:36:17,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:17,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-11-07 06:36:17,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=3133, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 06:36:17,326 INFO L87 Difference]: Start difference. First operand 234 states and 239 transitions. Second operand 65 states. [2020-11-07 06:36:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:23,530 INFO L93 Difference]: Finished difference Result 283 states and 293 transitions. [2020-11-07 06:36:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-11-07 06:36:23,532 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 223 [2020-11-07 06:36:23,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:23,534 INFO L225 Difference]: With dead ends: 283 [2020-11-07 06:36:23,534 INFO L226 Difference]: Without dead ends: 244 [2020-11-07 06:36:23,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=4791, Invalid=11211, Unknown=0, NotChecked=0, Total=16002 [2020-11-07 06:36:23,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-11-07 06:36:23,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2020-11-07 06:36:23,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-11-07 06:36:23,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2020-11-07 06:36:23,575 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 223 [2020-11-07 06:36:23,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:23,575 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2020-11-07 06:36:23,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-11-07 06:36:23,575 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2020-11-07 06:36:23,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-11-07 06:36:23,576 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:23,577 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:23,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 06:36:23,577 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:23,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:23,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1575008824, now seen corresponding path program 30 times [2020-11-07 06:36:23,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:23,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73680086] [2020-11-07 06:36:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:23,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:23,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:36:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2649 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:36:29,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73680086] [2020-11-07 06:36:29,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:29,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-11-07 06:36:29,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810716054] [2020-11-07 06:36:29,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-11-07 06:36:29,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:29,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-11-07 06:36:29,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=3330, Unknown=0, NotChecked=0, Total=4422 [2020-11-07 06:36:29,793 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand 67 states. [2020-11-07 06:36:36,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:36,708 INFO L93 Difference]: Finished difference Result 289 states and 299 transitions. [2020-11-07 06:36:36,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-11-07 06:36:36,709 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 229 [2020-11-07 06:36:36,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:36,712 INFO L225 Difference]: With dead ends: 289 [2020-11-07 06:36:36,712 INFO L226 Difference]: Without dead ends: 250 [2020-11-07 06:36:36,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3063 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=5105, Invalid=11925, Unknown=0, NotChecked=0, Total=17030 [2020-11-07 06:36:36,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-11-07 06:36:36,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2020-11-07 06:36:36,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-11-07 06:36:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 251 transitions. [2020-11-07 06:36:36,764 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 251 transitions. Word has length 229 [2020-11-07 06:36:36,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:36,764 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 251 transitions. [2020-11-07 06:36:36,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-11-07 06:36:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 251 transitions. [2020-11-07 06:36:36,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-11-07 06:36:36,766 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:36,766 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:36,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 06:36:36,767 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:36,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:36,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1760718980, now seen corresponding path program 31 times [2020-11-07 06:36:36,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:36,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878412292] [2020-11-07 06:36:36,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:36,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:36,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:36:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2830 backedges. 0 proven. 2821 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:36:43,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878412292] [2020-11-07 06:36:43,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:43,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-11-07 06:36:43,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372002002] [2020-11-07 06:36:43,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-11-07 06:36:43,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:43,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-11-07 06:36:43,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2020-11-07 06:36:43,452 INFO L87 Difference]: Start difference. First operand 246 states and 251 transitions. Second operand 69 states. [2020-11-07 06:36:50,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:50,463 INFO L93 Difference]: Finished difference Result 295 states and 305 transitions. [2020-11-07 06:36:50,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-11-07 06:36:50,465 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 235 [2020-11-07 06:36:50,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:50,466 INFO L225 Difference]: With dead ends: 295 [2020-11-07 06:36:50,467 INFO L226 Difference]: Without dead ends: 256 [2020-11-07 06:36:50,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=5429, Invalid=12661, Unknown=0, NotChecked=0, Total=18090 [2020-11-07 06:36:50,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-11-07 06:36:50,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2020-11-07 06:36:50,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-11-07 06:36:50,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 257 transitions. [2020-11-07 06:36:50,506 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 257 transitions. Word has length 235 [2020-11-07 06:36:50,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:50,506 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 257 transitions. [2020-11-07 06:36:50,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-11-07 06:36:50,506 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 257 transitions. [2020-11-07 06:36:50,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-11-07 06:36:50,508 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:50,508 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:50,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 06:36:50,508 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:50,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:50,508 INFO L82 PathProgramCache]: Analyzing trace with hash 609328704, now seen corresponding path program 32 times [2020-11-07 06:36:50,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:50,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215216954] [2020-11-07 06:36:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:50,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:50,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:36:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3017 backedges. 0 proven. 3008 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:36:57,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215216954] [2020-11-07 06:36:57,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:57,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-11-07 06:36:57,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073618606] [2020-11-07 06:36:57,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-11-07 06:36:57,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:57,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-11-07 06:36:57,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=3742, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 06:36:57,498 INFO L87 Difference]: Start difference. First operand 252 states and 257 transitions. Second operand 71 states. [2020-11-07 06:37:05,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:05,812 INFO L93 Difference]: Finished difference Result 301 states and 311 transitions. [2020-11-07 06:37:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-11-07 06:37:05,814 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 241 [2020-11-07 06:37:05,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:05,816 INFO L225 Difference]: With dead ends: 301 [2020-11-07 06:37:05,816 INFO L226 Difference]: Without dead ends: 262 [2020-11-07 06:37:05,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3459 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=5763, Invalid=13419, Unknown=0, NotChecked=0, Total=19182 [2020-11-07 06:37:05,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-11-07 06:37:05,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2020-11-07 06:37:05,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-11-07 06:37:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 263 transitions. [2020-11-07 06:37:05,886 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 263 transitions. Word has length 241 [2020-11-07 06:37:05,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:05,886 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 263 transitions. [2020-11-07 06:37:05,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-11-07 06:37:05,886 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 263 transitions. [2020-11-07 06:37:05,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-11-07 06:37:05,888 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:05,888 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:05,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 06:37:05,888 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:05,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:05,889 INFO L82 PathProgramCache]: Analyzing trace with hash -303132932, now seen corresponding path program 33 times [2020-11-07 06:37:05,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:05,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779219292] [2020-11-07 06:37:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:06,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:06,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:37:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3201 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:37:13,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779219292] [2020-11-07 06:37:13,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:13,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-11-07 06:37:13,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113969992] [2020-11-07 06:37:13,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-11-07 06:37:13,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:13,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-11-07 06:37:13,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=3957, Unknown=0, NotChecked=0, Total=5256 [2020-11-07 06:37:13,513 INFO L87 Difference]: Start difference. First operand 258 states and 263 transitions. Second operand 73 states. [2020-11-07 06:37:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:22,592 INFO L93 Difference]: Finished difference Result 307 states and 317 transitions. [2020-11-07 06:37:22,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-11-07 06:37:22,594 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 247 [2020-11-07 06:37:22,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:22,596 INFO L225 Difference]: With dead ends: 307 [2020-11-07 06:37:22,596 INFO L226 Difference]: Without dead ends: 268 [2020-11-07 06:37:22,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3666 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=6107, Invalid=14199, Unknown=0, NotChecked=0, Total=20306 [2020-11-07 06:37:22,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-11-07 06:37:22,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2020-11-07 06:37:22,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-11-07 06:37:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 269 transitions. [2020-11-07 06:37:22,684 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 269 transitions. Word has length 247 [2020-11-07 06:37:22,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:22,684 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 269 transitions. [2020-11-07 06:37:22,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-11-07 06:37:22,684 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 269 transitions. [2020-11-07 06:37:22,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-11-07 06:37:22,686 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:22,686 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:22,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 06:37:22,687 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:22,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:22,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1020591432, now seen corresponding path program 34 times [2020-11-07 06:37:22,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:22,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991109629] [2020-11-07 06:37:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:22,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:22,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:37:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3409 backedges. 0 proven. 3400 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:37:30,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991109629] [2020-11-07 06:37:30,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:30,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-11-07 06:37:30,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565317314] [2020-11-07 06:37:30,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-11-07 06:37:30,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:30,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-11-07 06:37:30,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1372, Invalid=4178, Unknown=0, NotChecked=0, Total=5550 [2020-11-07 06:37:30,717 INFO L87 Difference]: Start difference. First operand 264 states and 269 transitions. Second operand 75 states. [2020-11-07 06:37:39,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:39,559 INFO L93 Difference]: Finished difference Result 313 states and 323 transitions. [2020-11-07 06:37:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-11-07 06:37:39,563 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 253 [2020-11-07 06:37:39,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:39,565 INFO L225 Difference]: With dead ends: 313 [2020-11-07 06:37:39,565 INFO L226 Difference]: Without dead ends: 274 [2020-11-07 06:37:39,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=6461, Invalid=15001, Unknown=0, NotChecked=0, Total=21462 [2020-11-07 06:37:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-11-07 06:37:39,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2020-11-07 06:37:39,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-11-07 06:37:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 275 transitions. [2020-11-07 06:37:39,613 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 275 transitions. Word has length 253 [2020-11-07 06:37:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:39,613 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 275 transitions. [2020-11-07 06:37:39,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-11-07 06:37:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 275 transitions. [2020-11-07 06:37:39,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-11-07 06:37:39,615 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:39,615 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:39,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 06:37:39,615 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:39,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:39,616 INFO L82 PathProgramCache]: Analyzing trace with hash 18397556, now seen corresponding path program 35 times [2020-11-07 06:37:39,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:39,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744234886] [2020-11-07 06:37:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:39,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:39,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:37:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3614 backedges. 0 proven. 3605 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:37:48,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744234886] [2020-11-07 06:37:48,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:48,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-11-07 06:37:48,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252461794] [2020-11-07 06:37:48,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-11-07 06:37:48,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:48,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-11-07 06:37:48,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1447, Invalid=4405, Unknown=0, NotChecked=0, Total=5852 [2020-11-07 06:37:48,248 INFO L87 Difference]: Start difference. First operand 270 states and 275 transitions. Second operand 77 states. [2020-11-07 06:37:58,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:58,348 INFO L93 Difference]: Finished difference Result 319 states and 329 transitions. [2020-11-07 06:37:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-11-07 06:37:58,355 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 259 [2020-11-07 06:37:58,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:58,356 INFO L225 Difference]: With dead ends: 319 [2020-11-07 06:37:58,356 INFO L226 Difference]: Without dead ends: 280 [2020-11-07 06:37:58,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=6825, Invalid=15825, Unknown=0, NotChecked=0, Total=22650 [2020-11-07 06:37:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-11-07 06:37:58,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2020-11-07 06:37:58,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-11-07 06:37:58,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 281 transitions. [2020-11-07 06:37:58,441 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 281 transitions. Word has length 259 [2020-11-07 06:37:58,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:58,441 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 281 transitions. [2020-11-07 06:37:58,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-11-07 06:37:58,442 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 281 transitions. [2020-11-07 06:37:58,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-11-07 06:37:58,443 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:58,444 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:58,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 06:37:58,444 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:58,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:58,444 INFO L82 PathProgramCache]: Analyzing trace with hash -528911568, now seen corresponding path program 36 times [2020-11-07 06:37:58,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:58,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754145987] [2020-11-07 06:37:58,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:58,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:58,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:37:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3825 backedges. 0 proven. 3816 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:38:07,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754145987] [2020-11-07 06:38:07,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:07,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-11-07 06:38:07,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828386671] [2020-11-07 06:38:07,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-11-07 06:38:07,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:07,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-11-07 06:38:07,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 06:38:07,978 INFO L87 Difference]: Start difference. First operand 276 states and 281 transitions. Second operand 79 states. [2020-11-07 06:38:18,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:18,972 INFO L93 Difference]: Finished difference Result 325 states and 335 transitions. [2020-11-07 06:38:18,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-11-07 06:38:18,973 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 265 [2020-11-07 06:38:18,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:18,975 INFO L225 Difference]: With dead ends: 325 [2020-11-07 06:38:18,976 INFO L226 Difference]: Without dead ends: 286 [2020-11-07 06:38:18,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=7199, Invalid=16671, Unknown=0, NotChecked=0, Total=23870 [2020-11-07 06:38:18,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-11-07 06:38:19,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2020-11-07 06:38:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-11-07 06:38:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 287 transitions. [2020-11-07 06:38:19,040 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 287 transitions. Word has length 265 [2020-11-07 06:38:19,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:19,040 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 287 transitions. [2020-11-07 06:38:19,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-11-07 06:38:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 287 transitions. [2020-11-07 06:38:19,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-11-07 06:38:19,042 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:19,042 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:19,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 06:38:19,042 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:19,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:19,043 INFO L82 PathProgramCache]: Analyzing trace with hash -239144980, now seen corresponding path program 37 times [2020-11-07 06:38:19,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:19,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883697665] [2020-11-07 06:38:19,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:19,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:19,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:38:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4042 backedges. 0 proven. 4033 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:38:29,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883697665] [2020-11-07 06:38:29,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:29,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-11-07 06:38:29,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038599658] [2020-11-07 06:38:29,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-11-07 06:38:29,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:29,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-11-07 06:38:29,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=4877, Unknown=0, NotChecked=0, Total=6480 [2020-11-07 06:38:29,348 INFO L87 Difference]: Start difference. First operand 282 states and 287 transitions. Second operand 81 states. [2020-11-07 06:38:41,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:41,698 INFO L93 Difference]: Finished difference Result 331 states and 341 transitions. [2020-11-07 06:38:41,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-11-07 06:38:41,699 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 271 [2020-11-07 06:38:41,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:41,701 INFO L225 Difference]: With dead ends: 331 [2020-11-07 06:38:41,701 INFO L226 Difference]: Without dead ends: 292 [2020-11-07 06:38:41,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=7583, Invalid=17539, Unknown=0, NotChecked=0, Total=25122 [2020-11-07 06:38:41,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-11-07 06:38:41,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2020-11-07 06:38:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-11-07 06:38:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 293 transitions. [2020-11-07 06:38:41,766 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 293 transitions. Word has length 271 [2020-11-07 06:38:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:41,767 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 293 transitions. [2020-11-07 06:38:41,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-11-07 06:38:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 293 transitions. [2020-11-07 06:38:41,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-11-07 06:38:41,769 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:41,769 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:41,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 06:38:41,769 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:41,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:41,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1727336536, now seen corresponding path program 38 times [2020-11-07 06:38:41,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:41,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444575088] [2020-11-07 06:38:41,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:41,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:41,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:38:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4265 backedges. 0 proven. 4256 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:38:52,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444575088] [2020-11-07 06:38:52,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:52,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-11-07 06:38:52,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6125836] [2020-11-07 06:38:52,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-11-07 06:38:52,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:52,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-11-07 06:38:52,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=5122, Unknown=0, NotChecked=0, Total=6806 [2020-11-07 06:38:52,792 INFO L87 Difference]: Start difference. First operand 288 states and 293 transitions. Second operand 83 states. [2020-11-07 06:39:05,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:05,257 INFO L93 Difference]: Finished difference Result 337 states and 347 transitions. [2020-11-07 06:39:05,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-11-07 06:39:05,259 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 277 [2020-11-07 06:39:05,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:05,261 INFO L225 Difference]: With dead ends: 337 [2020-11-07 06:39:05,262 INFO L226 Difference]: Without dead ends: 298 [2020-11-07 06:39:05,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=7977, Invalid=18429, Unknown=0, NotChecked=0, Total=26406 [2020-11-07 06:39:05,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-11-07 06:39:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2020-11-07 06:39:05,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-11-07 06:39:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 299 transitions. [2020-11-07 06:39:05,352 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 299 transitions. Word has length 277 [2020-11-07 06:39:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:05,352 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 299 transitions. [2020-11-07 06:39:05,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-11-07 06:39:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 299 transitions. [2020-11-07 06:39:05,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-11-07 06:39:05,354 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:05,355 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:05,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 06:39:05,355 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:05,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:05,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1976618396, now seen corresponding path program 39 times [2020-11-07 06:39:05,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:05,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961752495] [2020-11-07 06:39:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:05,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:05,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:39:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4494 backedges. 0 proven. 4485 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:39:17,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961752495] [2020-11-07 06:39:17,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:17,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-11-07 06:39:17,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744376597] [2020-11-07 06:39:17,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-11-07 06:39:17,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:17,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-11-07 06:39:17,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=5373, Unknown=0, NotChecked=0, Total=7140 [2020-11-07 06:39:17,481 INFO L87 Difference]: Start difference. First operand 294 states and 299 transitions. Second operand 85 states. [2020-11-07 06:39:29,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:29,626 INFO L93 Difference]: Finished difference Result 343 states and 353 transitions. [2020-11-07 06:39:29,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-11-07 06:39:29,629 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 283 [2020-11-07 06:39:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:29,631 INFO L225 Difference]: With dead ends: 343 [2020-11-07 06:39:29,631 INFO L226 Difference]: Without dead ends: 304 [2020-11-07 06:39:29,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=8381, Invalid=19341, Unknown=0, NotChecked=0, Total=27722 [2020-11-07 06:39:29,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-11-07 06:39:29,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2020-11-07 06:39:29,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-11-07 06:39:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 305 transitions. [2020-11-07 06:39:29,703 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 305 transitions. Word has length 283 [2020-11-07 06:39:29,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:29,703 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 305 transitions. [2020-11-07 06:39:29,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-11-07 06:39:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 305 transitions. [2020-11-07 06:39:29,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-11-07 06:39:29,705 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:29,705 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:29,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 06:39:29,706 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:29,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:29,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1152219168, now seen corresponding path program 40 times [2020-11-07 06:39:29,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:29,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891799460] [2020-11-07 06:39:29,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:29,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:29,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:39:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4729 backedges. 0 proven. 4720 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:39:41,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891799460] [2020-11-07 06:39:41,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:41,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2020-11-07 06:39:41,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417645725] [2020-11-07 06:39:41,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-11-07 06:39:41,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:41,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-11-07 06:39:41,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1852, Invalid=5630, Unknown=0, NotChecked=0, Total=7482 [2020-11-07 06:39:41,766 INFO L87 Difference]: Start difference. First operand 300 states and 305 transitions. Second operand 87 states. [2020-11-07 06:39:55,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:55,077 INFO L93 Difference]: Finished difference Result 349 states and 359 transitions. [2020-11-07 06:39:55,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-11-07 06:39:55,079 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 289 [2020-11-07 06:39:55,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:55,081 INFO L225 Difference]: With dead ends: 349 [2020-11-07 06:39:55,081 INFO L226 Difference]: Without dead ends: 310 [2020-11-07 06:39:55,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=8795, Invalid=20275, Unknown=0, NotChecked=0, Total=29070 [2020-11-07 06:39:55,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-11-07 06:39:55,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2020-11-07 06:39:55,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-11-07 06:39:55,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 311 transitions. [2020-11-07 06:39:55,157 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 311 transitions. Word has length 289 [2020-11-07 06:39:55,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:55,158 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 311 transitions. [2020-11-07 06:39:55,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-11-07 06:39:55,158 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 311 transitions. [2020-11-07 06:39:55,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-11-07 06:39:55,160 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:55,160 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:55,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 06:39:55,160 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:55,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1883799332, now seen corresponding path program 41 times [2020-11-07 06:39:55,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:55,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023095649] [2020-11-07 06:39:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:55,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:55,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:39:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4961 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:40:08,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023095649] [2020-11-07 06:40:08,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:08,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-11-07 06:40:08,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93616512] [2020-11-07 06:40:08,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-11-07 06:40:08,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:08,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-11-07 06:40:08,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1939, Invalid=5893, Unknown=0, NotChecked=0, Total=7832 [2020-11-07 06:40:08,258 INFO L87 Difference]: Start difference. First operand 306 states and 311 transitions. Second operand 89 states. [2020-11-07 06:40:22,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:22,336 INFO L93 Difference]: Finished difference Result 355 states and 365 transitions. [2020-11-07 06:40:22,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-11-07 06:40:22,338 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 295 [2020-11-07 06:40:22,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:22,340 INFO L225 Difference]: With dead ends: 355 [2020-11-07 06:40:22,340 INFO L226 Difference]: Without dead ends: 316 [2020-11-07 06:40:22,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5538 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=9219, Invalid=21231, Unknown=0, NotChecked=0, Total=30450 [2020-11-07 06:40:22,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-11-07 06:40:22,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2020-11-07 06:40:22,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-11-07 06:40:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 317 transitions. [2020-11-07 06:40:22,395 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 317 transitions. Word has length 295 [2020-11-07 06:40:22,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:22,395 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 317 transitions. [2020-11-07 06:40:22,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-11-07 06:40:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 317 transitions. [2020-11-07 06:40:22,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-11-07 06:40:22,397 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:22,398 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:22,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 06:40:22,398 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:22,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:22,398 INFO L82 PathProgramCache]: Analyzing trace with hash -164688744, now seen corresponding path program 42 times [2020-11-07 06:40:22,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:22,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543261339] [2020-11-07 06:40:22,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:22,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:22,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:40:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5217 backedges. 0 proven. 5208 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:40:37,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543261339] [2020-11-07 06:40:37,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:37,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2020-11-07 06:40:37,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950988368] [2020-11-07 06:40:37,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-11-07 06:40:37,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:37,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-11-07 06:40:37,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2028, Invalid=6162, Unknown=0, NotChecked=0, Total=8190 [2020-11-07 06:40:37,127 INFO L87 Difference]: Start difference. First operand 312 states and 317 transitions. Second operand 91 states. [2020-11-07 06:40:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:54,512 INFO L93 Difference]: Finished difference Result 361 states and 371 transitions. [2020-11-07 06:40:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-11-07 06:40:54,514 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 301 [2020-11-07 06:40:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:54,516 INFO L225 Difference]: With dead ends: 361 [2020-11-07 06:40:54,516 INFO L226 Difference]: Without dead ends: 322 [2020-11-07 06:40:54,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=9653, Invalid=22209, Unknown=0, NotChecked=0, Total=31862 [2020-11-07 06:40:54,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-11-07 06:40:54,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2020-11-07 06:40:54,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-11-07 06:40:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 323 transitions. [2020-11-07 06:40:54,597 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 323 transitions. Word has length 301 [2020-11-07 06:40:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:54,597 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 323 transitions. [2020-11-07 06:40:54,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-11-07 06:40:54,597 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 323 transitions. [2020-11-07 06:40:54,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-11-07 06:40:54,599 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:54,600 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:54,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-07 06:40:54,600 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:54,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:54,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1118165844, now seen corresponding path program 43 times [2020-11-07 06:40:54,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:54,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218044554] [2020-11-07 06:40:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:54,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:54,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:40:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5470 backedges. 0 proven. 5461 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:41:11,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218044554] [2020-11-07 06:41:11,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:11,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2020-11-07 06:41:11,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115609122] [2020-11-07 06:41:11,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-11-07 06:41:11,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:11,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-11-07 06:41:11,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2119, Invalid=6437, Unknown=0, NotChecked=0, Total=8556 [2020-11-07 06:41:11,215 INFO L87 Difference]: Start difference. First operand 318 states and 323 transitions. Second operand 93 states. [2020-11-07 06:41:30,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:30,158 INFO L93 Difference]: Finished difference Result 367 states and 377 transitions. [2020-11-07 06:41:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2020-11-07 06:41:30,161 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 307 [2020-11-07 06:41:30,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:30,163 INFO L225 Difference]: With dead ends: 367 [2020-11-07 06:41:30,163 INFO L226 Difference]: Without dead ends: 328 [2020-11-07 06:41:30,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6066 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=10097, Invalid=23209, Unknown=0, NotChecked=0, Total=33306 [2020-11-07 06:41:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-11-07 06:41:30,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2020-11-07 06:41:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-11-07 06:41:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 329 transitions. [2020-11-07 06:41:30,253 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 329 transitions. Word has length 307 [2020-11-07 06:41:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:30,253 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 329 transitions. [2020-11-07 06:41:30,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-11-07 06:41:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 329 transitions. [2020-11-07 06:41:30,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-11-07 06:41:30,260 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:30,260 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:30,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-07 06:41:30,261 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:30,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:30,261 INFO L82 PathProgramCache]: Analyzing trace with hash -77746928, now seen corresponding path program 44 times [2020-11-07 06:41:30,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:30,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940987816] [2020-11-07 06:41:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:30,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:30,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:41:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5729 backedges. 0 proven. 5720 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:41:48,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940987816] [2020-11-07 06:41:48,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:48,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2020-11-07 06:41:48,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100353626] [2020-11-07 06:41:48,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-11-07 06:41:48,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:48,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-11-07 06:41:48,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=6718, Unknown=0, NotChecked=0, Total=8930 [2020-11-07 06:41:48,982 INFO L87 Difference]: Start difference. First operand 324 states and 329 transitions. Second operand 95 states. [2020-11-07 06:42:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:10,283 INFO L93 Difference]: Finished difference Result 373 states and 383 transitions. [2020-11-07 06:42:10,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2020-11-07 06:42:10,286 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 313 [2020-11-07 06:42:10,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:10,288 INFO L225 Difference]: With dead ends: 373 [2020-11-07 06:42:10,288 INFO L226 Difference]: Without dead ends: 334 [2020-11-07 06:42:10,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6339 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=10551, Invalid=24231, Unknown=0, NotChecked=0, Total=34782 [2020-11-07 06:42:10,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-11-07 06:42:10,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 330. [2020-11-07 06:42:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-11-07 06:42:10,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 335 transitions. [2020-11-07 06:42:10,364 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 335 transitions. Word has length 313 [2020-11-07 06:42:10,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:10,365 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 335 transitions. [2020-11-07 06:42:10,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-11-07 06:42:10,365 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 335 transitions. [2020-11-07 06:42:10,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-11-07 06:42:10,367 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:10,367 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:10,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-11-07 06:42:10,367 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:10,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:10,368 INFO L82 PathProgramCache]: Analyzing trace with hash -565689908, now seen corresponding path program 45 times [2020-11-07 06:42:10,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:10,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084197437] [2020-11-07 06:42:10,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:10,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:10,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:42:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5994 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:42:32,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084197437] [2020-11-07 06:42:32,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:32,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2020-11-07 06:42:32,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948185972] [2020-11-07 06:42:32,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-11-07 06:42:32,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:32,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-11-07 06:42:32,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=7005, Unknown=0, NotChecked=0, Total=9312 [2020-11-07 06:42:32,066 INFO L87 Difference]: Start difference. First operand 330 states and 335 transitions. Second operand 97 states. [2020-11-07 06:42:54,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:54,098 INFO L93 Difference]: Finished difference Result 379 states and 389 transitions. [2020-11-07 06:42:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2020-11-07 06:42:54,102 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 319 [2020-11-07 06:42:54,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:54,104 INFO L225 Difference]: With dead ends: 379 [2020-11-07 06:42:54,104 INFO L226 Difference]: Without dead ends: 340 [2020-11-07 06:42:54,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6618 ImplicationChecksByTransitivity, 41.4s TimeCoverageRelationStatistics Valid=11015, Invalid=25275, Unknown=0, NotChecked=0, Total=36290 [2020-11-07 06:42:54,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-11-07 06:42:54,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2020-11-07 06:42:54,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-11-07 06:42:54,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 341 transitions. [2020-11-07 06:42:54,176 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 341 transitions. Word has length 319 [2020-11-07 06:42:54,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:54,176 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 341 transitions. [2020-11-07 06:42:54,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-11-07 06:42:54,176 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 341 transitions. [2020-11-07 06:42:54,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-07 06:42:54,178 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:54,178 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:54,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-07 06:42:54,178 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:54,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:54,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1560762760, now seen corresponding path program 46 times [2020-11-07 06:42:54,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:54,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656153584] [2020-11-07 06:42:54,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:54,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:54,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:42:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6265 backedges. 0 proven. 6256 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:43:18,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656153584] [2020-11-07 06:43:18,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:18,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2020-11-07 06:43:18,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313853957] [2020-11-07 06:43:18,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-11-07 06:43:18,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:18,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-11-07 06:43:18,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2404, Invalid=7298, Unknown=0, NotChecked=0, Total=9702 [2020-11-07 06:43:18,823 INFO L87 Difference]: Start difference. First operand 336 states and 341 transitions. Second operand 99 states. [2020-11-07 06:43:44,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:43:44,859 INFO L93 Difference]: Finished difference Result 385 states and 395 transitions. [2020-11-07 06:43:44,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2020-11-07 06:43:44,863 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 325 [2020-11-07 06:43:44,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:43:44,865 INFO L225 Difference]: With dead ends: 385 [2020-11-07 06:43:44,865 INFO L226 Difference]: Without dead ends: 346 [2020-11-07 06:43:44,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6903 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=11489, Invalid=26341, Unknown=0, NotChecked=0, Total=37830 [2020-11-07 06:43:44,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-11-07 06:43:44,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 342. [2020-11-07 06:43:44,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-11-07 06:43:44,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 347 transitions. [2020-11-07 06:43:44,964 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 347 transitions. Word has length 325 [2020-11-07 06:43:44,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:43:44,965 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 347 transitions. [2020-11-07 06:43:44,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-11-07 06:43:44,965 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 347 transitions. [2020-11-07 06:43:44,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-11-07 06:43:44,967 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:43:44,967 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:43:44,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-07 06:43:44,967 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:43:44,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:43:44,968 INFO L82 PathProgramCache]: Analyzing trace with hash 418165828, now seen corresponding path program 47 times [2020-11-07 06:43:44,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:43:44,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324315818] [2020-11-07 06:43:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:43:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:45,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:45,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:45,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:43:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6542 backedges. 0 proven. 6533 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:44:14,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324315818] [2020-11-07 06:44:14,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:44:14,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2020-11-07 06:44:14,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278116144] [2020-11-07 06:44:14,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-11-07 06:44:14,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:44:14,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-11-07 06:44:14,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2503, Invalid=7597, Unknown=0, NotChecked=0, Total=10100 [2020-11-07 06:44:14,288 INFO L87 Difference]: Start difference. First operand 342 states and 347 transitions. Second operand 101 states. [2020-11-07 06:44:44,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:44:44,633 INFO L93 Difference]: Finished difference Result 391 states and 401 transitions. [2020-11-07 06:44:44,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2020-11-07 06:44:44,638 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 331 [2020-11-07 06:44:44,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:44:44,640 INFO L225 Difference]: With dead ends: 391 [2020-11-07 06:44:44,640 INFO L226 Difference]: Without dead ends: 352 [2020-11-07 06:44:44,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7194 ImplicationChecksByTransitivity, 55.9s TimeCoverageRelationStatistics Valid=11973, Invalid=27429, Unknown=0, NotChecked=0, Total=39402 [2020-11-07 06:44:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-11-07 06:44:44,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 348. [2020-11-07 06:44:44,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-11-07 06:44:44,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 353 transitions. [2020-11-07 06:44:44,739 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 353 transitions. Word has length 331 [2020-11-07 06:44:44,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:44:44,740 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 353 transitions. [2020-11-07 06:44:44,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-11-07 06:44:44,740 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 353 transitions. [2020-11-07 06:44:44,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-11-07 06:44:44,742 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:44:44,742 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:44:44,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-07 06:44:44,743 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:44:44,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:44:44,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1593446912, now seen corresponding path program 48 times [2020-11-07 06:44:44,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:44:44,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64456592] [2020-11-07 06:44:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:44:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:44,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:44:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:44,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:44:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:49,952 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:44:50,502 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:44:58,184 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:03,145 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:10,957 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6825 backedges. 0 proven. 6816 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:45:19,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64456592] [2020-11-07 06:45:19,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:45:19,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2020-11-07 06:45:19,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276043560] [2020-11-07 06:45:19,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-11-07 06:45:19,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:45:19,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-11-07 06:45:19,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2604, Invalid=7902, Unknown=0, NotChecked=0, Total=10506 [2020-11-07 06:45:19,535 INFO L87 Difference]: Start difference. First operand 348 states and 353 transitions. Second operand 103 states. [2020-11-07 06:45:20,880 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-11-07 06:45:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:45:55,692 INFO L93 Difference]: Finished difference Result 397 states and 407 transitions. [2020-11-07 06:45:55,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2020-11-07 06:45:55,697 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 337 [2020-11-07 06:45:55,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:45:55,700 INFO L225 Difference]: With dead ends: 397 [2020-11-07 06:45:55,700 INFO L226 Difference]: Without dead ends: 358 [2020-11-07 06:45:55,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7491 ImplicationChecksByTransitivity, 66.8s TimeCoverageRelationStatistics Valid=12467, Invalid=28539, Unknown=0, NotChecked=0, Total=41006 [2020-11-07 06:45:55,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-11-07 06:45:55,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2020-11-07 06:45:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-11-07 06:45:55,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 359 transitions. [2020-11-07 06:45:55,766 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 359 transitions. Word has length 337 [2020-11-07 06:45:55,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:45:55,766 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 359 transitions. [2020-11-07 06:45:55,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-11-07 06:45:55,766 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 359 transitions. [2020-11-07 06:45:55,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-11-07 06:45:55,768 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:45:55,768 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:45:55,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-07 06:45:55,769 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:45:55,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:45:55,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1545522500, now seen corresponding path program 49 times [2020-11-07 06:45:55,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:45:55,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822807709] [2020-11-07 06:45:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:45:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:55,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:45:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:55,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:45:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:56,298 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:56,438 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:56,582 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:56,732 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:56,888 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:57,051 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:57,218 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:57,391 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:57,566 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:57,755 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:57,947 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:58,138 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:58,338 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:58,546 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:58,756 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:58,973 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:59,192 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:59,438 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:59,668 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:59,909 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:00,150 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:00,402 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:00,655 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:01,171 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:01,442 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:01,946 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:02,247 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:02,547 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:02,859 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:03,173 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:03,498 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:03,827 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:04,158 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:04,765 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:05,102 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:05,450 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:05,803 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:06,172 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:06,527 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:06,892 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:07,282 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:07,689 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:08,068 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:08,456 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:08,842 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:09,264 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:09,664 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:10,067 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:10,867 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:11,676 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:12,537 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:13,006 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:13,490 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:13,972 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:14,492 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:14,994 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:15,493 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:16,004 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:16,517 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:17,039 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:17,570 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:18,108 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:18,642 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:19,116 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:19,649 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:21,166 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:22,239 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:23,307 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:23,861 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:24,419 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:26,154 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:27,919 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:28,570 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:29,219 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:29,875 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:30,535 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:31,207 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:31,873 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:32,554 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:33,255 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:33,947 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:34,636 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:35,342 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:36,054 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:36,768 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7114 backedges. 0 proven. 7105 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:46:37,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822807709] [2020-11-07 06:46:37,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:46:37,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2020-11-07 06:46:37,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332949340] [2020-11-07 06:46:37,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 105 states [2020-11-07 06:46:37,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:46:37,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2020-11-07 06:46:37,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2707, Invalid=8213, Unknown=0, NotChecked=0, Total=10920 [2020-11-07 06:46:37,393 INFO L87 Difference]: Start difference. First operand 354 states and 359 transitions. Second operand 105 states. [2020-11-07 06:46:39,151 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-11-07 06:46:39,755 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 45