/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/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 23:00:20,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 23:00:20,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 23:00:20,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 23:00:20,994 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 23:00:21,007 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 23:00:21,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 23:00:21,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 23:00:21,010 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 23:00:21,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 23:00:21,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 23:00:21,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 23:00:21,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 23:00:21,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 23:00:21,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 23:00:21,011 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 23:00:21,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 23:00:21,012 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 23:00:21,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 23:00:21,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 23:00:21,012 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 23:00:21,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 23:00:21,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 23:00:21,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:00:21,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 23:00:21,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 23:00:21,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 23:00:21,014 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 23:00:21,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 23:00:21,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 23:00:21,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 23:00:21,442 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 23:00:21,445 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 23:00:21,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2021-02-23 23:00:21,537 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f4921085/facc876d64aa449cac2d62926ed7e50b/FLAG939693ece [2021-02-23 23:00:22,201 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 23:00:22,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2021-02-23 23:00:22,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f4921085/facc876d64aa449cac2d62926ed7e50b/FLAG939693ece [2021-02-23 23:00:22,560 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f4921085/facc876d64aa449cac2d62926ed7e50b [2021-02-23 23:00:22,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 23:00:22,579 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 23:00:22,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 23:00:22,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 23:00:22,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 23:00:22,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:00:22" (1/1) ... [2021-02-23 23:00:22,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cdc2d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:22, skipping insertion in model container [2021-02-23 23:00:22,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:00:22" (1/1) ... [2021-02-23 23:00:22,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 23:00:22,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 23:00:22,794 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c[4246,4259] [2021-02-23 23:00:22,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:00:22,809 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 23:00:22,845 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c[4246,4259] [2021-02-23 23:00:22,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:00:22,865 INFO L208 MainTranslator]: Completed translation [2021-02-23 23:00:22,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:22 WrapperNode [2021-02-23 23:00:22,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 23:00:22,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 23:00:22,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 23:00:22,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 23:00:22,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:22" (1/1) ... [2021-02-23 23:00:22,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:22" (1/1) ... [2021-02-23 23:00:22,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:22" (1/1) ... [2021-02-23 23:00:22,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:22" (1/1) ... [2021-02-23 23:00:22,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:22" (1/1) ... [2021-02-23 23:00:22,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:22" (1/1) ... [2021-02-23 23:00:22,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:22" (1/1) ... [2021-02-23 23:00:22,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 23:00:22,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 23:00:22,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 23:00:22,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 23:00:22,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:00:23,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 23:00:23,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 23:00:23,054 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 23:00:23,054 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 23:00:23,055 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 23:00:23,055 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 23:00:23,055 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 23:00:23,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 23:00:23,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 23:00:23,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 23:00:23,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 23:00:23,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 23:00:23,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 23:00:23,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 23:00:23,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 23:00:23,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 23:00:23,690 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 23:00:23,690 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 23:00:23,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:00:23 BoogieIcfgContainer [2021-02-23 23:00:23,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 23:00:23,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 23:00:23,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 23:00:23,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 23:00:23,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:00:22" (1/3) ... [2021-02-23 23:00:23,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7b9f7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:00:23, skipping insertion in model container [2021-02-23 23:00:23,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:22" (2/3) ... [2021-02-23 23:00:23,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7b9f7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:00:23, skipping insertion in model container [2021-02-23 23:00:23,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:00:23" (3/3) ... [2021-02-23 23:00:23,702 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2021-02-23 23:00:23,709 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 23:00:23,714 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 23:00:23,734 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 23:00:23,761 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 23:00:23,761 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 23:00:23,761 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 23:00:23,762 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 23:00:23,762 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 23:00:23,762 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 23:00:23,762 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 23:00:23,762 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 23:00:23,783 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states. [2021-02-23 23:00:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-02-23 23:00:23,798 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:23,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:23,799 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:23,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:23,807 INFO L82 PathProgramCache]: Analyzing trace with hash -898561761, now seen corresponding path program 1 times [2021-02-23 23:00:23,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:23,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159232035] [2021-02-23 23:00:23,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:24,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:24,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:24,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:24,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:24,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:24,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:24,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:24,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:24,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:24,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159232035] [2021-02-23 23:00:24,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:24,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:24,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620134714] [2021-02-23 23:00:24,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:24,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:24,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:24,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:24,310 INFO L87 Difference]: Start difference. First operand 137 states. Second operand 4 states. [2021-02-23 23:00:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:25,094 INFO L93 Difference]: Finished difference Result 288 states and 393 transitions. [2021-02-23 23:00:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:25,097 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2021-02-23 23:00:25,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:25,112 INFO L225 Difference]: With dead ends: 288 [2021-02-23 23:00:25,112 INFO L226 Difference]: Without dead ends: 200 [2021-02-23 23:00:25,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:00:25,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-02-23 23:00:25,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2021-02-23 23:00:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-02-23 23:00:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2021-02-23 23:00:25,212 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 87 [2021-02-23 23:00:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:25,213 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2021-02-23 23:00:25,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:25,214 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2021-02-23 23:00:25,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-23 23:00:25,217 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:25,218 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:25,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 23:00:25,218 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:25,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:25,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1510688528, now seen corresponding path program 1 times [2021-02-23 23:00:25,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:25,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841118560] [2021-02-23 23:00:25,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:25,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:25,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:25,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:25,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:25,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:25,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:25,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:25,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:25,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:25,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841118560] [2021-02-23 23:00:25,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:25,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:25,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044128174] [2021-02-23 23:00:25,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:25,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:25,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:25,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:25,364 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand 4 states. [2021-02-23 23:00:25,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:25,811 INFO L93 Difference]: Finished difference Result 238 states and 318 transitions. [2021-02-23 23:00:25,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:25,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2021-02-23 23:00:25,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:25,815 INFO L225 Difference]: With dead ends: 238 [2021-02-23 23:00:25,815 INFO L226 Difference]: Without dead ends: 236 [2021-02-23 23:00:25,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:00:25,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-02-23 23:00:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 198. [2021-02-23 23:00:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-02-23 23:00:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2021-02-23 23:00:25,861 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 88 [2021-02-23 23:00:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:25,862 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2021-02-23 23:00:25,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2021-02-23 23:00:25,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-23 23:00:25,864 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:25,864 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:25,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 23:00:25,865 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:25,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:25,866 INFO L82 PathProgramCache]: Analyzing trace with hash -2085367227, now seen corresponding path program 1 times [2021-02-23 23:00:25,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:25,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907656400] [2021-02-23 23:00:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:25,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:25,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:25,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:25,961 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:25,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:25,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:25,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:26,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:26,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:26,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907656400] [2021-02-23 23:00:26,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:26,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:26,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009385895] [2021-02-23 23:00:26,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:26,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:26,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:26,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:26,054 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand 4 states. [2021-02-23 23:00:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:26,510 INFO L93 Difference]: Finished difference Result 474 states and 655 transitions. [2021-02-23 23:00:26,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:26,511 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2021-02-23 23:00:26,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:26,518 INFO L225 Difference]: With dead ends: 474 [2021-02-23 23:00:26,518 INFO L226 Difference]: Without dead ends: 333 [2021-02-23 23:00:26,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:00:26,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-02-23 23:00:26,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 331. [2021-02-23 23:00:26,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2021-02-23 23:00:26,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 448 transitions. [2021-02-23 23:00:26,588 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 448 transitions. Word has length 88 [2021-02-23 23:00:26,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:26,589 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 448 transitions. [2021-02-23 23:00:26,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:26,589 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 448 transitions. [2021-02-23 23:00:26,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-23 23:00:26,592 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:26,592 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:26,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 23:00:26,592 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:26,593 INFO L82 PathProgramCache]: Analyzing trace with hash 348430457, now seen corresponding path program 1 times [2021-02-23 23:00:26,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:26,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40954564] [2021-02-23 23:00:26,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:26,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:26,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:26,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:26,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:26,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:26,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:26,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:26,692 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:26,694 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:26,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40954564] [2021-02-23 23:00:26,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:26,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:26,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687159367] [2021-02-23 23:00:26,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:26,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:26,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:26,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:26,722 INFO L87 Difference]: Start difference. First operand 331 states and 448 transitions. Second operand 4 states. [2021-02-23 23:00:27,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:27,101 INFO L93 Difference]: Finished difference Result 403 states and 554 transitions. [2021-02-23 23:00:27,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:27,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2021-02-23 23:00:27,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:27,104 INFO L225 Difference]: With dead ends: 403 [2021-02-23 23:00:27,105 INFO L226 Difference]: Without dead ends: 401 [2021-02-23 23:00:27,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:00:27,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-02-23 23:00:27,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 331. [2021-02-23 23:00:27,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2021-02-23 23:00:27,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 446 transitions. [2021-02-23 23:00:27,165 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 446 transitions. Word has length 89 [2021-02-23 23:00:27,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:27,166 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 446 transitions. [2021-02-23 23:00:27,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:27,166 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 446 transitions. [2021-02-23 23:00:27,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-23 23:00:27,167 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:27,168 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:27,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 23:00:27,168 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:27,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:27,169 INFO L82 PathProgramCache]: Analyzing trace with hash -221630637, now seen corresponding path program 1 times [2021-02-23 23:00:27,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:27,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676084490] [2021-02-23 23:00:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:27,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:27,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:27,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:27,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:27,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:27,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:27,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:27,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:27,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:27,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676084490] [2021-02-23 23:00:27,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:27,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:27,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482515223] [2021-02-23 23:00:27,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:27,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:27,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:27,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:27,254 INFO L87 Difference]: Start difference. First operand 331 states and 446 transitions. Second operand 4 states. [2021-02-23 23:00:27,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:27,663 INFO L93 Difference]: Finished difference Result 867 states and 1208 transitions. [2021-02-23 23:00:27,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:27,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2021-02-23 23:00:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:27,667 INFO L225 Difference]: With dead ends: 867 [2021-02-23 23:00:27,667 INFO L226 Difference]: Without dead ends: 593 [2021-02-23 23:00:27,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:00:27,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-02-23 23:00:27,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2021-02-23 23:00:27,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2021-02-23 23:00:27,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 810 transitions. [2021-02-23 23:00:27,765 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 810 transitions. Word has length 89 [2021-02-23 23:00:27,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:27,766 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 810 transitions. [2021-02-23 23:00:27,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:27,766 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 810 transitions. [2021-02-23 23:00:27,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-23 23:00:27,768 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:27,768 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:27,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 23:00:27,768 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:27,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:27,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2146544516, now seen corresponding path program 1 times [2021-02-23 23:00:27,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:27,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459354411] [2021-02-23 23:00:27,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:27,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:27,808 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:27,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:27,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:27,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:27,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:27,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:27,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:27,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:27,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459354411] [2021-02-23 23:00:27,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:27,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:27,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339945083] [2021-02-23 23:00:27,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:27,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:27,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:27,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:27,877 INFO L87 Difference]: Start difference. First operand 591 states and 810 transitions. Second operand 4 states. [2021-02-23 23:00:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:28,317 INFO L93 Difference]: Finished difference Result 723 states and 1004 transitions. [2021-02-23 23:00:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:28,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2021-02-23 23:00:28,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:28,323 INFO L225 Difference]: With dead ends: 723 [2021-02-23 23:00:28,323 INFO L226 Difference]: Without dead ends: 721 [2021-02-23 23:00:28,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:00:28,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-02-23 23:00:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 591. [2021-02-23 23:00:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2021-02-23 23:00:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 806 transitions. [2021-02-23 23:00:28,451 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 806 transitions. Word has length 90 [2021-02-23 23:00:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:28,451 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 806 transitions. [2021-02-23 23:00:28,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:28,451 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 806 transitions. [2021-02-23 23:00:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-23 23:00:28,453 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:28,453 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:28,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 23:00:28,454 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:28,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:28,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1719629177, now seen corresponding path program 1 times [2021-02-23 23:00:28,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:28,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430581887] [2021-02-23 23:00:28,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:28,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:28,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:28,525 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:28,527 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:28,533 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:28,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:28,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:28,573 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:28,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:28,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430581887] [2021-02-23 23:00:28,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:28,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:28,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821321076] [2021-02-23 23:00:28,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:28,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:28,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:28,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:28,587 INFO L87 Difference]: Start difference. First operand 591 states and 806 transitions. Second operand 4 states. [2021-02-23 23:00:29,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:29,192 INFO L93 Difference]: Finished difference Result 1635 states and 2272 transitions. [2021-02-23 23:00:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:29,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2021-02-23 23:00:29,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:29,199 INFO L225 Difference]: With dead ends: 1635 [2021-02-23 23:00:29,199 INFO L226 Difference]: Without dead ends: 1101 [2021-02-23 23:00:29,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:00:29,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-02-23 23:00:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1099. [2021-02-23 23:00:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1099 states. [2021-02-23 23:00:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1506 transitions. [2021-02-23 23:00:29,381 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1506 transitions. Word has length 90 [2021-02-23 23:00:29,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:29,382 INFO L480 AbstractCegarLoop]: Abstraction has 1099 states and 1506 transitions. [2021-02-23 23:00:29,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:29,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1506 transitions. [2021-02-23 23:00:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-02-23 23:00:29,385 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:29,385 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:29,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 23:00:29,386 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:29,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:29,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1769141639, now seen corresponding path program 1 times [2021-02-23 23:00:29,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:29,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301650597] [2021-02-23 23:00:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:29,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:29,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:29,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:29,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:29,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:29,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:29,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:29,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:29,493 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:29,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301650597] [2021-02-23 23:00:29,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:29,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:29,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525862354] [2021-02-23 23:00:29,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:29,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:29,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:29,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:29,512 INFO L87 Difference]: Start difference. First operand 1099 states and 1506 transitions. Second operand 4 states. [2021-02-23 23:00:30,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:30,211 INFO L93 Difference]: Finished difference Result 3135 states and 4340 transitions. [2021-02-23 23:00:30,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:30,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2021-02-23 23:00:30,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:30,223 INFO L225 Difference]: With dead ends: 3135 [2021-02-23 23:00:30,224 INFO L226 Difference]: Without dead ends: 2093 [2021-02-23 23:00:30,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:00:30,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-02-23 23:00:30,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2091. [2021-02-23 23:00:30,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2021-02-23 23:00:30,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 2858 transitions. [2021-02-23 23:00:30,552 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 2858 transitions. Word has length 91 [2021-02-23 23:00:30,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:30,552 INFO L480 AbstractCegarLoop]: Abstraction has 2091 states and 2858 transitions. [2021-02-23 23:00:30,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:30,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 2858 transitions. [2021-02-23 23:00:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-02-23 23:00:30,555 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:30,555 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:30,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 23:00:30,556 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:30,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2053505869, now seen corresponding path program 1 times [2021-02-23 23:00:30,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:30,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957574076] [2021-02-23 23:00:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:30,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:30,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:30,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:30,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:30,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:30,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:30,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:30,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:30,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:30,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957574076] [2021-02-23 23:00:30,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:30,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:30,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949504110] [2021-02-23 23:00:30,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:30,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:30,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:30,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:30,658 INFO L87 Difference]: Start difference. First operand 2091 states and 2858 transitions. Second operand 4 states. [2021-02-23 23:00:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:31,346 INFO L93 Difference]: Finished difference Result 2559 states and 3532 transitions. [2021-02-23 23:00:31,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:31,353 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2021-02-23 23:00:31,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:31,367 INFO L225 Difference]: With dead ends: 2559 [2021-02-23 23:00:31,367 INFO L226 Difference]: Without dead ends: 2557 [2021-02-23 23:00:31,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:00:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-02-23 23:00:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2091. [2021-02-23 23:00:31,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2021-02-23 23:00:31,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 2842 transitions. [2021-02-23 23:00:31,696 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 2842 transitions. Word has length 91 [2021-02-23 23:00:31,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:31,697 INFO L480 AbstractCegarLoop]: Abstraction has 2091 states and 2842 transitions. [2021-02-23 23:00:31,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:31,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 2842 transitions. [2021-02-23 23:00:31,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-02-23 23:00:31,699 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:31,700 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:31,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 23:00:31,700 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:31,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:31,701 INFO L82 PathProgramCache]: Analyzing trace with hash -830691816, now seen corresponding path program 1 times [2021-02-23 23:00:31,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:31,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120234415] [2021-02-23 23:00:31,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:31,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:31,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:31,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:31,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:31,729 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:31,730 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:31,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:31,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:31,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:31,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120234415] [2021-02-23 23:00:31,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:31,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:31,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628921011] [2021-02-23 23:00:31,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:31,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:31,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:31,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:31,767 INFO L87 Difference]: Start difference. First operand 2091 states and 2842 transitions. Second operand 4 states. [2021-02-23 23:00:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:32,527 INFO L93 Difference]: Finished difference Result 2543 states and 3484 transitions. [2021-02-23 23:00:32,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:32,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2021-02-23 23:00:32,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:32,541 INFO L225 Difference]: With dead ends: 2543 [2021-02-23 23:00:32,541 INFO L226 Difference]: Without dead ends: 2541 [2021-02-23 23:00:32,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:00:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-02-23 23:00:32,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2091. [2021-02-23 23:00:32,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2021-02-23 23:00:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 2826 transitions. [2021-02-23 23:00:32,873 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 2826 transitions. Word has length 92 [2021-02-23 23:00:32,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:32,874 INFO L480 AbstractCegarLoop]: Abstraction has 2091 states and 2826 transitions. [2021-02-23 23:00:32,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:32,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 2826 transitions. [2021-02-23 23:00:32,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-02-23 23:00:32,876 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:32,876 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:32,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 23:00:32,877 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:32,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:32,878 INFO L82 PathProgramCache]: Analyzing trace with hash -990938963, now seen corresponding path program 1 times [2021-02-23 23:00:32,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:32,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974226891] [2021-02-23 23:00:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:32,900 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:32,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:32,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:32,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:32,906 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:32,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:32,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:32,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:32,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:32,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974226891] [2021-02-23 23:00:32,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:32,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:32,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520324932] [2021-02-23 23:00:32,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:32,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:32,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:32,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:32,954 INFO L87 Difference]: Start difference. First operand 2091 states and 2826 transitions. Second operand 4 states. [2021-02-23 23:00:33,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:33,876 INFO L93 Difference]: Finished difference Result 6063 states and 8236 transitions. [2021-02-23 23:00:33,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:33,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2021-02-23 23:00:33,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:33,896 INFO L225 Difference]: With dead ends: 6063 [2021-02-23 23:00:33,897 INFO L226 Difference]: Without dead ends: 4029 [2021-02-23 23:00:33,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:00:33,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4029 states. [2021-02-23 23:00:34,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4029 to 4027. [2021-02-23 23:00:34,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4027 states. [2021-02-23 23:00:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4027 states to 4027 states and 5402 transitions. [2021-02-23 23:00:34,547 INFO L78 Accepts]: Start accepts. Automaton has 4027 states and 5402 transitions. Word has length 92 [2021-02-23 23:00:34,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:34,547 INFO L480 AbstractCegarLoop]: Abstraction has 4027 states and 5402 transitions. [2021-02-23 23:00:34,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:34,547 INFO L276 IsEmpty]: Start isEmpty. Operand 4027 states and 5402 transitions. [2021-02-23 23:00:34,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-02-23 23:00:34,551 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:34,552 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:34,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 23:00:34,552 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:34,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:34,553 INFO L82 PathProgramCache]: Analyzing trace with hash -46506463, now seen corresponding path program 1 times [2021-02-23 23:00:34,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:34,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657413514] [2021-02-23 23:00:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:34,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:34,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:34,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:34,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:34,579 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:34,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:34,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:34,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:34,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:34,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657413514] [2021-02-23 23:00:34,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:34,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:34,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225345597] [2021-02-23 23:00:34,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:34,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:34,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:34,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:34,628 INFO L87 Difference]: Start difference. First operand 4027 states and 5402 transitions. Second operand 4 states. [2021-02-23 23:00:35,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:35,387 INFO L93 Difference]: Finished difference Result 4863 states and 6556 transitions. [2021-02-23 23:00:35,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:35,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2021-02-23 23:00:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:35,424 INFO L225 Difference]: With dead ends: 4863 [2021-02-23 23:00:35,424 INFO L226 Difference]: Without dead ends: 4861 [2021-02-23 23:00:35,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:00:35,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-02-23 23:00:36,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 4027. [2021-02-23 23:00:36,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4027 states. [2021-02-23 23:00:36,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4027 states to 4027 states and 5370 transitions. [2021-02-23 23:00:36,134 INFO L78 Accepts]: Start accepts. Automaton has 4027 states and 5370 transitions. Word has length 93 [2021-02-23 23:00:36,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:36,135 INFO L480 AbstractCegarLoop]: Abstraction has 4027 states and 5370 transitions. [2021-02-23 23:00:36,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:36,135 INFO L276 IsEmpty]: Start isEmpty. Operand 4027 states and 5370 transitions. [2021-02-23 23:00:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-02-23 23:00:36,138 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:36,138 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:36,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 23:00:36,138 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:36,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:36,139 INFO L82 PathProgramCache]: Analyzing trace with hash -654091333, now seen corresponding path program 1 times [2021-02-23 23:00:36,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:36,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427444546] [2021-02-23 23:00:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:36,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:36,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:36,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:36,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:36,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:36,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:36,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:36,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:36,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:36,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427444546] [2021-02-23 23:00:36,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:36,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:36,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862823794] [2021-02-23 23:00:36,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:36,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:36,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:36,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:36,212 INFO L87 Difference]: Start difference. First operand 4027 states and 5370 transitions. Second operand 4 states. [2021-02-23 23:00:37,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:37,570 INFO L93 Difference]: Finished difference Result 11775 states and 15740 transitions. [2021-02-23 23:00:37,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:37,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2021-02-23 23:00:37,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:37,602 INFO L225 Difference]: With dead ends: 11775 [2021-02-23 23:00:37,603 INFO L226 Difference]: Without dead ends: 7805 [2021-02-23 23:00:37,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:00:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2021-02-23 23:00:38,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7803. [2021-02-23 23:00:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2021-02-23 23:00:38,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 10298 transitions. [2021-02-23 23:00:38,516 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 10298 transitions. Word has length 93 [2021-02-23 23:00:38,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:38,517 INFO L480 AbstractCegarLoop]: Abstraction has 7803 states and 10298 transitions. [2021-02-23 23:00:38,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:38,517 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 10298 transitions. [2021-02-23 23:00:38,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-02-23 23:00:38,524 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:38,524 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:38,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 23:00:38,524 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:38,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:38,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1506563924, now seen corresponding path program 1 times [2021-02-23 23:00:38,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:38,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412093498] [2021-02-23 23:00:38,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:38,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:38,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:38,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:38,549 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:38,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:38,552 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:38,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:38,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:38,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:38,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412093498] [2021-02-23 23:00:38,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:38,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:38,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501288868] [2021-02-23 23:00:38,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:38,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:38,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:38,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:38,593 INFO L87 Difference]: Start difference. First operand 7803 states and 10298 transitions. Second operand 4 states. [2021-02-23 23:00:39,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:39,868 INFO L93 Difference]: Finished difference Result 9343 states and 12348 transitions. [2021-02-23 23:00:39,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:39,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2021-02-23 23:00:39,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:39,890 INFO L225 Difference]: With dead ends: 9343 [2021-02-23 23:00:39,891 INFO L226 Difference]: Without dead ends: 9341 [2021-02-23 23:00:39,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:00:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-02-23 23:00:40,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 7803. [2021-02-23 23:00:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2021-02-23 23:00:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 10234 transitions. [2021-02-23 23:00:40,961 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 10234 transitions. Word has length 94 [2021-02-23 23:00:40,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:40,962 INFO L480 AbstractCegarLoop]: Abstraction has 7803 states and 10234 transitions. [2021-02-23 23:00:40,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:40,962 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 10234 transitions. [2021-02-23 23:00:40,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-02-23 23:00:40,967 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:40,967 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:40,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-23 23:00:40,968 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:40,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:40,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1198250977, now seen corresponding path program 1 times [2021-02-23 23:00:40,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:40,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320195060] [2021-02-23 23:00:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:40,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:40,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:40,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:40,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:40,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:40,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:41,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:41,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:41,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:41,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320195060] [2021-02-23 23:00:41,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:41,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:41,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43138417] [2021-02-23 23:00:41,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:41,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:41,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:41,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:41,041 INFO L87 Difference]: Start difference. First operand 7803 states and 10234 transitions. Second operand 4 states. [2021-02-23 23:00:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:43,077 INFO L93 Difference]: Finished difference Result 22911 states and 30076 transitions. [2021-02-23 23:00:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:43,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2021-02-23 23:00:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:43,110 INFO L225 Difference]: With dead ends: 22911 [2021-02-23 23:00:43,111 INFO L226 Difference]: Without dead ends: 15165 [2021-02-23 23:00:43,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:00:43,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15165 states. [2021-02-23 23:00:44,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15165 to 15163. [2021-02-23 23:00:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15163 states. [2021-02-23 23:00:44,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15163 states to 15163 states and 19642 transitions. [2021-02-23 23:00:44,887 INFO L78 Accepts]: Start accepts. Automaton has 15163 states and 19642 transitions. Word has length 94 [2021-02-23 23:00:44,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:44,888 INFO L480 AbstractCegarLoop]: Abstraction has 15163 states and 19642 transitions. [2021-02-23 23:00:44,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:44,888 INFO L276 IsEmpty]: Start isEmpty. Operand 15163 states and 19642 transitions. [2021-02-23 23:00:44,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-02-23 23:00:44,900 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:44,900 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:44,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-23 23:00:44,900 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:44,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:44,901 INFO L82 PathProgramCache]: Analyzing trace with hash 476295413, now seen corresponding path program 1 times [2021-02-23 23:00:44,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:44,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687050607] [2021-02-23 23:00:44,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:44,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:44,926 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:44,930 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:44,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:44,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:44,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:44,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:44,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:44,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:44,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687050607] [2021-02-23 23:00:44,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:44,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:44,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806478873] [2021-02-23 23:00:44,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:44,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:44,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:44,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:44,992 INFO L87 Difference]: Start difference. First operand 15163 states and 19642 transitions. Second operand 4 states. [2021-02-23 23:00:47,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:47,657 INFO L93 Difference]: Finished difference Result 17983 states and 23228 transitions. [2021-02-23 23:00:47,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:47,659 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2021-02-23 23:00:47,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:47,701 INFO L225 Difference]: With dead ends: 17983 [2021-02-23 23:00:47,701 INFO L226 Difference]: Without dead ends: 17981 [2021-02-23 23:00:47,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:00:47,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17981 states. [2021-02-23 23:00:49,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17981 to 15163. [2021-02-23 23:00:49,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15163 states. [2021-02-23 23:00:49,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15163 states to 15163 states and 19514 transitions. [2021-02-23 23:00:49,917 INFO L78 Accepts]: Start accepts. Automaton has 15163 states and 19514 transitions. Word has length 95 [2021-02-23 23:00:49,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:49,918 INFO L480 AbstractCegarLoop]: Abstraction has 15163 states and 19514 transitions. [2021-02-23 23:00:49,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:49,918 INFO L276 IsEmpty]: Start isEmpty. Operand 15163 states and 19514 transitions. [2021-02-23 23:00:49,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-02-23 23:00:49,931 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:49,931 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:49,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-23 23:00:49,931 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:49,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:49,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1508679185, now seen corresponding path program 1 times [2021-02-23 23:00:49,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:49,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255437278] [2021-02-23 23:00:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:49,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:49,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:49,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:49,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:49,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:49,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:49,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:49,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:49,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:49,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255437278] [2021-02-23 23:00:49,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:49,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:49,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291577514] [2021-02-23 23:00:49,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:49,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:49,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:49,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:49,996 INFO L87 Difference]: Start difference. First operand 15163 states and 19514 transitions. Second operand 4 states. [2021-02-23 23:00:53,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:53,540 INFO L93 Difference]: Finished difference Result 44607 states and 57404 transitions. [2021-02-23 23:00:53,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:53,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2021-02-23 23:00:53,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:53,585 INFO L225 Difference]: With dead ends: 44607 [2021-02-23 23:00:53,586 INFO L226 Difference]: Without dead ends: 29501 [2021-02-23 23:00:53,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:00:53,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29501 states. [2021-02-23 23:00:57,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29501 to 29499. [2021-02-23 23:00:57,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29499 states. [2021-02-23 23:00:58,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29499 states to 29499 states and 37434 transitions. [2021-02-23 23:00:58,022 INFO L78 Accepts]: Start accepts. Automaton has 29499 states and 37434 transitions. Word has length 95 [2021-02-23 23:00:58,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:58,022 INFO L480 AbstractCegarLoop]: Abstraction has 29499 states and 37434 transitions. [2021-02-23 23:00:58,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 29499 states and 37434 transitions. [2021-02-23 23:00:58,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-02-23 23:00:58,042 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:58,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:00:58,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-23 23:00:58,043 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:58,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:58,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1815393088, now seen corresponding path program 1 times [2021-02-23 23:00:58,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:58,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188427739] [2021-02-23 23:00:58,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:58,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:58,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:58,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:58,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:58,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:58,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:58,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:58,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:58,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:00:58,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188427739] [2021-02-23 23:00:58,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:58,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:58,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436271457] [2021-02-23 23:00:58,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:58,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:58,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:58,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:58,114 INFO L87 Difference]: Start difference. First operand 29499 states and 37434 transitions. Second operand 4 states. [2021-02-23 23:01:02,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:01:02,912 INFO L93 Difference]: Finished difference Result 34623 states and 43580 transitions. [2021-02-23 23:01:02,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:01:02,913 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2021-02-23 23:01:02,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:01:02,963 INFO L225 Difference]: With dead ends: 34623 [2021-02-23 23:01:02,963 INFO L226 Difference]: Without dead ends: 34621 [2021-02-23 23:01:02,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:01:03,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34621 states. [2021-02-23 23:01:07,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34621 to 29499. [2021-02-23 23:01:07,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29499 states. [2021-02-23 23:01:07,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29499 states to 29499 states and 37178 transitions. [2021-02-23 23:01:07,348 INFO L78 Accepts]: Start accepts. Automaton has 29499 states and 37178 transitions. Word has length 96 [2021-02-23 23:01:07,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:01:07,348 INFO L480 AbstractCegarLoop]: Abstraction has 29499 states and 37178 transitions. [2021-02-23 23:01:07,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:01:07,349 INFO L276 IsEmpty]: Start isEmpty. Operand 29499 states and 37178 transitions. [2021-02-23 23:01:07,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-02-23 23:01:07,363 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:01:07,363 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:01:07,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-23 23:01:07,363 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:01:07,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:01:07,364 INFO L82 PathProgramCache]: Analyzing trace with hash 475832085, now seen corresponding path program 1 times [2021-02-23 23:01:07,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:01:07,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971474123] [2021-02-23 23:01:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:01:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:01:07,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:01:07,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:01:07,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:01:07,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:01:07,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:01:07,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:01:07,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:01:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:01:07,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:01:07,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:01:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:01:07,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971474123] [2021-02-23 23:01:07,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:01:07,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:01:07,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236418529] [2021-02-23 23:01:07,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:01:07,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:01:07,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:01:07,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:01:07,445 INFO L87 Difference]: Start difference. First operand 29499 states and 37178 transitions. Second operand 4 states. [2021-02-23 23:01:15,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:01:15,608 INFO L93 Difference]: Finished difference Result 86847 states and 109372 transitions. [2021-02-23 23:01:15,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:01:15,609 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2021-02-23 23:01:15,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:01:15,697 INFO L225 Difference]: With dead ends: 86847 [2021-02-23 23:01:15,697 INFO L226 Difference]: Without dead ends: 57405 [2021-02-23 23:01:15,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:01:15,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57405 states. [2021-02-23 23:01:23,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57405 to 57403. [2021-02-23 23:01:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57403 states. [2021-02-23 23:01:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57403 states to 57403 states and 71226 transitions. [2021-02-23 23:01:23,171 INFO L78 Accepts]: Start accepts. Automaton has 57403 states and 71226 transitions. Word has length 96 [2021-02-23 23:01:23,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:01:23,171 INFO L480 AbstractCegarLoop]: Abstraction has 57403 states and 71226 transitions. [2021-02-23 23:01:23,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:01:23,171 INFO L276 IsEmpty]: Start isEmpty. Operand 57403 states and 71226 transitions. [2021-02-23 23:01:23,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-02-23 23:01:23,192 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:01:23,193 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:01:23,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-23 23:01:23,193 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:01:23,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:01:23,194 INFO L82 PathProgramCache]: Analyzing trace with hash 377748425, now seen corresponding path program 1 times [2021-02-23 23:01:23,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:01:23,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491316707] [2021-02-23 23:01:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:01:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:01:23,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:01:23,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:01:23,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:01:23,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:01:23,253 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:01:23,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:01:23,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:01:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:01:23,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:01:23,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:01:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:01:23,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491316707] [2021-02-23 23:01:23,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:01:23,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:01:23,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451506408] [2021-02-23 23:01:23,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:01:23,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:01:23,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:01:23,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:01:23,290 INFO L87 Difference]: Start difference. First operand 57403 states and 71226 transitions. Second operand 4 states. [2021-02-23 23:01:31,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:01:31,764 INFO L93 Difference]: Finished difference Result 66623 states and 81468 transitions. [2021-02-23 23:01:31,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:01:31,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2021-02-23 23:01:31,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:01:31,860 INFO L225 Difference]: With dead ends: 66623 [2021-02-23 23:01:31,860 INFO L226 Difference]: Without dead ends: 66621 [2021-02-23 23:01:31,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:01:31,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66621 states. [2021-02-23 23:01:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66621 to 57403. [2021-02-23 23:01:39,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57403 states. [2021-02-23 23:01:39,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57403 states to 57403 states and 70714 transitions. [2021-02-23 23:01:39,260 INFO L78 Accepts]: Start accepts. Automaton has 57403 states and 70714 transitions. Word has length 97 [2021-02-23 23:01:39,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:01:39,261 INFO L480 AbstractCegarLoop]: Abstraction has 57403 states and 70714 transitions. [2021-02-23 23:01:39,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:01:39,261 INFO L276 IsEmpty]: Start isEmpty. Operand 57403 states and 70714 transitions. [2021-02-23 23:01:39,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-02-23 23:01:39,285 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:01:39,285 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:01:39,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-23 23:01:39,285 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:01:39,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:01:39,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1866139683, now seen corresponding path program 1 times [2021-02-23 23:01:39,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:01:39,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640436755] [2021-02-23 23:01:39,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:01:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:01:39,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:01:39,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:01:39,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:01:39,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:01:39,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:01:39,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:01:39,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:01:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:01:39,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:01:39,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:01:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:01:39,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640436755] [2021-02-23 23:01:39,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:01:39,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:01:39,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267547671] [2021-02-23 23:01:39,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:01:39,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:01:39,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:01:39,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:01:39,371 INFO L87 Difference]: Start difference. First operand 57403 states and 70714 transitions. Second operand 4 states. [2021-02-23 23:01:54,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:01:54,504 INFO L93 Difference]: Finished difference Result 169021 states and 207931 transitions. [2021-02-23 23:01:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:01:54,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2021-02-23 23:01:54,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:01:54,625 INFO L225 Difference]: With dead ends: 169021 [2021-02-23 23:01:54,626 INFO L226 Difference]: Without dead ends: 57403 [2021-02-23 23:01:54,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:01:54,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57403 states. [2021-02-23 23:02:02,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57403 to 57403. [2021-02-23 23:02:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57403 states. [2021-02-23 23:02:02,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57403 states to 57403 states and 68666 transitions. [2021-02-23 23:02:02,304 INFO L78 Accepts]: Start accepts. Automaton has 57403 states and 68666 transitions. Word has length 97 [2021-02-23 23:02:02,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:02:02,304 INFO L480 AbstractCegarLoop]: Abstraction has 57403 states and 68666 transitions. [2021-02-23 23:02:02,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:02:02,304 INFO L276 IsEmpty]: Start isEmpty. Operand 57403 states and 68666 transitions. [2021-02-23 23:02:02,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-02-23 23:02:02,328 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:02:02,328 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:02:02,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-02-23 23:02:02,328 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:02:02,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:02:02,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1239562796, now seen corresponding path program 1 times [2021-02-23 23:02:02,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:02:02,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846853950] [2021-02-23 23:02:02,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:02:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:02:02,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:02:02,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:02:02,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:02:02,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:02:02,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:02:02,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:02:02,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:02:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:02:02,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:02:02,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:02:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:02:02,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846853950] [2021-02-23 23:02:02,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:02:02,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:02:02,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987303368] [2021-02-23 23:02:02,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:02:02,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:02:02,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:02:02,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:02:02,395 INFO L87 Difference]: Start difference. First operand 57403 states and 68666 transitions. Second operand 4 states. [2021-02-23 23:02:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:02:10,033 INFO L93 Difference]: Finished difference Result 57403 states and 68666 transitions. [2021-02-23 23:02:10,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:02:10,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2021-02-23 23:02:10,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:02:10,035 INFO L225 Difference]: With dead ends: 57403 [2021-02-23 23:02:10,035 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 23:02:10,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:02:10,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 23:02:10,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 23:02:10,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 23:02:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 23:02:10,095 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 98 [2021-02-23 23:02:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:02:10,095 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 23:02:10,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:02:10,095 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 23:02:10,095 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 23:02:10,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-02-23 23:02:10,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 23:02:32,462 WARN L202 SmtUtils]: Spent 22.22 s on a formula simplification. DAG size of input: 4192 DAG size of output: 34 [2021-02-23 23:02:37,628 WARN L202 SmtUtils]: Spent 5.14 s on a formula simplification. DAG size of input: 2102 DAG size of output: 31