/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_10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 23:00:09,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 23:00:09,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 23:00:09,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 23:00:09,784 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 23:00:09,822 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 23:00:09,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 23:00:09,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 23:00:09,827 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 23:00:09,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 23:00:09,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 23:00:09,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 23:00:09,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 23:00:09,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 23:00:09,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 23:00:09,830 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 23:00:09,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 23:00:09,831 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 23:00:09,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 23:00:09,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 23:00:09,831 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 23:00:09,832 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 23:00:09,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 23:00:09,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:00:09,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 23:00:09,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 23:00:09,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 23:00:09,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 23:00:10,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 23:00:10,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 23:00:10,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 23:00:10,257 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 23:00:10,257 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 23:00:10,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2021-02-23 23:00:10,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e03bd5d3/04c8b21b16164767888d2654569bc453/FLAG573af77a2 [2021-02-23 23:00:10,902 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 23:00:10,902 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c [2021-02-23 23:00:10,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e03bd5d3/04c8b21b16164767888d2654569bc453/FLAG573af77a2 [2021-02-23 23:00:11,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e03bd5d3/04c8b21b16164767888d2654569bc453 [2021-02-23 23:00:11,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 23:00:11,283 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 23:00:11,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 23:00:11,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 23:00:11,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 23:00:11,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:00:11" (1/1) ... [2021-02-23 23:00:11,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ffa1579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:11, skipping insertion in model container [2021-02-23 23:00:11,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:00:11" (1/1) ... [2021-02-23 23:00:11,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 23:00:11,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 23:00:11,531 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_10.c[3901,3914] [2021-02-23 23:00:11,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:00:11,546 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 23:00:11,576 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_10.c[3901,3914] [2021-02-23 23:00:11,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:00:11,595 INFO L208 MainTranslator]: Completed translation [2021-02-23 23:00:11,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:11 WrapperNode [2021-02-23 23:00:11,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 23:00:11,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 23:00:11,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 23:00:11,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 23:00:11,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:11" (1/1) ... [2021-02-23 23:00:11,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:11" (1/1) ... [2021-02-23 23:00:11,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:11" (1/1) ... [2021-02-23 23:00:11,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:11" (1/1) ... [2021-02-23 23:00:11,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:11" (1/1) ... [2021-02-23 23:00:11,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:11" (1/1) ... [2021-02-23 23:00:11,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:11" (1/1) ... [2021-02-23 23:00:11,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 23:00:11,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 23:00:11,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 23:00:11,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 23:00:11,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:11" (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 23:00:11,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 23:00:11,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 23:00:11,834 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 23:00:11,834 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 23:00:11,834 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 23:00:11,835 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 23:00:11,835 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 23:00:11,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 23:00:11,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 23:00:11,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 23:00:11,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 23:00:11,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 23:00:11,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 23:00:11,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 23:00:11,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 23:00:11,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 23:00:12,631 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 23:00:12,631 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 23:00:12,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:00:12 BoogieIcfgContainer [2021-02-23 23:00:12,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 23:00:12,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 23:00:12,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 23:00:12,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 23:00:12,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:00:11" (1/3) ... [2021-02-23 23:00:12,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2268c125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:00:12, skipping insertion in model container [2021-02-23 23:00:12,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:00:11" (2/3) ... [2021-02-23 23:00:12,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2268c125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:00:12, skipping insertion in model container [2021-02-23 23:00:12,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:00:12" (3/3) ... [2021-02-23 23:00:12,644 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2021-02-23 23:00:12,653 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 23:00:12,660 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 23:00:12,683 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 23:00:12,710 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 23:00:12,710 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 23:00:12,710 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 23:00:12,711 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 23:00:12,711 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 23:00:12,711 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 23:00:12,711 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 23:00:12,711 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 23:00:12,733 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states. [2021-02-23 23:00:12,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-02-23 23:00:12,748 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:12,750 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] [2021-02-23 23:00:12,750 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:12,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:12,758 INFO L82 PathProgramCache]: Analyzing trace with hash -410987913, now seen corresponding path program 1 times [2021-02-23 23:00:12,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:12,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380173602] [2021-02-23 23:00:12,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:13,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:13,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:13,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:13,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:13,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:13,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:13,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:13,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:13,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:13,175 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 23:00:13,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380173602] [2021-02-23 23:00:13,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:13,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:13,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578155139] [2021-02-23 23:00:13,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:13,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:13,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:13,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:13,239 INFO L87 Difference]: Start difference. First operand 127 states. Second operand 4 states. [2021-02-23 23:00:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:13,768 INFO L93 Difference]: Finished difference Result 266 states and 362 transitions. [2021-02-23 23:00:13,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:13,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2021-02-23 23:00:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:13,785 INFO L225 Difference]: With dead ends: 266 [2021-02-23 23:00:13,786 INFO L226 Difference]: Without dead ends: 184 [2021-02-23 23:00:13,790 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 23:00:13,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-02-23 23:00:13,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2021-02-23 23:00:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-02-23 23:00:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 238 transitions. [2021-02-23 23:00:13,883 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 238 transitions. Word has length 81 [2021-02-23 23:00:13,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:13,884 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 238 transitions. [2021-02-23 23:00:13,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:13,884 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 238 transitions. [2021-02-23 23:00:13,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-02-23 23:00:13,888 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:13,888 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] [2021-02-23 23:00:13,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 23:00:13,889 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:13,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:13,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1499658385, now seen corresponding path program 1 times [2021-02-23 23:00:13,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:13,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781055129] [2021-02-23 23:00:13,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:14,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:14,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:14,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:14,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:14,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:14,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:14,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:14,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:14,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:14,094 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 23:00:14,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781055129] [2021-02-23 23:00:14,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:14,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:14,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670894392] [2021-02-23 23:00:14,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:14,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:14,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:14,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:14,102 INFO L87 Difference]: Start difference. First operand 182 states and 238 transitions. Second operand 4 states. [2021-02-23 23:00:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:14,464 INFO L93 Difference]: Finished difference Result 219 states and 291 transitions. [2021-02-23 23:00:14,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:14,464 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2021-02-23 23:00:14,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:14,468 INFO L225 Difference]: With dead ends: 219 [2021-02-23 23:00:14,468 INFO L226 Difference]: Without dead ends: 217 [2021-02-23 23:00:14,469 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 23:00:14,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-02-23 23:00:14,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 182. [2021-02-23 23:00:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-02-23 23:00:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 237 transitions. [2021-02-23 23:00:14,510 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 237 transitions. Word has length 82 [2021-02-23 23:00:14,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:14,511 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 237 transitions. [2021-02-23 23:00:14,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:14,511 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 237 transitions. [2021-02-23 23:00:14,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-02-23 23:00:14,513 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:14,513 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] [2021-02-23 23:00:14,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 23:00:14,514 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:14,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:14,514 INFO L82 PathProgramCache]: Analyzing trace with hash 144520521, now seen corresponding path program 1 times [2021-02-23 23:00:14,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:14,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548157220] [2021-02-23 23:00:14,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:14,573 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:14,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:14,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:14,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:14,578 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:14,579 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:14,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:14,609 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:14,610 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:14,619 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 23:00:14,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548157220] [2021-02-23 23:00:14,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:14,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:14,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354023] [2021-02-23 23:00:14,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:14,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:14,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:14,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:14,622 INFO L87 Difference]: Start difference. First operand 182 states and 237 transitions. Second operand 4 states. [2021-02-23 23:00:14,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:14,973 INFO L93 Difference]: Finished difference Result 434 states and 597 transitions. [2021-02-23 23:00:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:14,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2021-02-23 23:00:14,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:14,980 INFO L225 Difference]: With dead ends: 434 [2021-02-23 23:00:14,981 INFO L226 Difference]: Without dead ends: 305 [2021-02-23 23:00:14,982 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 23:00:14,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-02-23 23:00:15,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 303. [2021-02-23 23:00:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2021-02-23 23:00:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 408 transitions. [2021-02-23 23:00:15,072 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 408 transitions. Word has length 82 [2021-02-23 23:00:15,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:15,072 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 408 transitions. [2021-02-23 23:00:15,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 408 transitions. [2021-02-23 23:00:15,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-02-23 23:00:15,080 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:15,080 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] [2021-02-23 23:00:15,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 23:00:15,081 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:15,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:15,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1463383348, now seen corresponding path program 1 times [2021-02-23 23:00:15,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:15,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30220307] [2021-02-23 23:00:15,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:15,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:15,187 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:15,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:15,191 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:15,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:15,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:15,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:15,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:15,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:15,257 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 23:00:15,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30220307] [2021-02-23 23:00:15,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:15,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:15,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280825727] [2021-02-23 23:00:15,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:15,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:15,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:15,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:15,262 INFO L87 Difference]: Start difference. First operand 303 states and 408 transitions. Second operand 4 states. [2021-02-23 23:00:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:15,570 INFO L93 Difference]: Finished difference Result 369 states and 504 transitions. [2021-02-23 23:00:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:15,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2021-02-23 23:00:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:15,576 INFO L225 Difference]: With dead ends: 369 [2021-02-23 23:00:15,577 INFO L226 Difference]: Without dead ends: 367 [2021-02-23 23:00:15,577 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 23:00:15,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-02-23 23:00:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 303. [2021-02-23 23:00:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2021-02-23 23:00:15,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 406 transitions. [2021-02-23 23:00:15,659 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 406 transitions. Word has length 83 [2021-02-23 23:00:15,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:15,661 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 406 transitions. [2021-02-23 23:00:15,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:15,661 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 406 transitions. [2021-02-23 23:00:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-02-23 23:00:15,667 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:15,667 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] [2021-02-23 23:00:15,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 23:00:15,668 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:15,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:15,669 INFO L82 PathProgramCache]: Analyzing trace with hash 185413163, now seen corresponding path program 1 times [2021-02-23 23:00:15,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:15,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454201198] [2021-02-23 23:00:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:15,752 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:15,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:15,756 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:15,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:15,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:15,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:15,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:15,803 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:15,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:15,814 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 23:00:15,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454201198] [2021-02-23 23:00:15,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:15,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:15,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140886394] [2021-02-23 23:00:15,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:15,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:15,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:15,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:15,828 INFO L87 Difference]: Start difference. First operand 303 states and 406 transitions. Second operand 4 states. [2021-02-23 23:00:16,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:16,209 INFO L93 Difference]: Finished difference Result 791 states and 1096 transitions. [2021-02-23 23:00:16,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:16,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2021-02-23 23:00:16,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:16,213 INFO L225 Difference]: With dead ends: 791 [2021-02-23 23:00:16,214 INFO L226 Difference]: Without dead ends: 541 [2021-02-23 23:00:16,223 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 23:00:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-02-23 23:00:16,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 539. [2021-02-23 23:00:16,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2021-02-23 23:00:16,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 734 transitions. [2021-02-23 23:00:16,355 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 734 transitions. Word has length 83 [2021-02-23 23:00:16,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:16,362 INFO L480 AbstractCegarLoop]: Abstraction has 539 states and 734 transitions. [2021-02-23 23:00:16,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:16,362 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 734 transitions. [2021-02-23 23:00:16,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-02-23 23:00:16,366 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:16,366 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] [2021-02-23 23:00:16,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 23:00:16,366 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:16,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:16,367 INFO L82 PathProgramCache]: Analyzing trace with hash -338856829, now seen corresponding path program 1 times [2021-02-23 23:00:16,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:16,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638853323] [2021-02-23 23:00:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:16,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:16,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:16,426 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:16,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:16,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:16,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:16,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:16,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:16,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:16,481 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 23:00:16,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638853323] [2021-02-23 23:00:16,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:16,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:16,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997797291] [2021-02-23 23:00:16,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:16,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:16,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:16,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:16,486 INFO L87 Difference]: Start difference. First operand 539 states and 734 transitions. Second operand 4 states. [2021-02-23 23:00:16,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:16,873 INFO L93 Difference]: Finished difference Result 659 states and 908 transitions. [2021-02-23 23:00:16,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:16,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2021-02-23 23:00:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:16,878 INFO L225 Difference]: With dead ends: 659 [2021-02-23 23:00:16,878 INFO L226 Difference]: Without dead ends: 657 [2021-02-23 23:00:16,879 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 23:00:16,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-02-23 23:00:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 539. [2021-02-23 23:00:16,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2021-02-23 23:00:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 730 transitions. [2021-02-23 23:00:16,998 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 730 transitions. Word has length 84 [2021-02-23 23:00:16,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:16,999 INFO L480 AbstractCegarLoop]: Abstraction has 539 states and 730 transitions. [2021-02-23 23:00:16,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:16,999 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 730 transitions. [2021-02-23 23:00:17,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-02-23 23:00:17,001 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:17,001 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] [2021-02-23 23:00:17,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 23:00:17,001 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:17,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:17,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1453085437, now seen corresponding path program 1 times [2021-02-23 23:00:17,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:17,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989865306] [2021-02-23 23:00:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:17,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:17,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:17,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:17,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:17,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:17,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:17,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:17,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:17,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:17,072 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 23:00:17,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989865306] [2021-02-23 23:00:17,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:17,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:17,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550117427] [2021-02-23 23:00:17,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:17,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:17,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:17,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:17,074 INFO L87 Difference]: Start difference. First operand 539 states and 730 transitions. Second operand 4 states. [2021-02-23 23:00:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:17,588 INFO L93 Difference]: Finished difference Result 1487 states and 2052 transitions. [2021-02-23 23:00:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:17,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2021-02-23 23:00:17,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:17,595 INFO L225 Difference]: With dead ends: 1487 [2021-02-23 23:00:17,595 INFO L226 Difference]: Without dead ends: 1001 [2021-02-23 23:00:17,597 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 23:00:17,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-02-23 23:00:17,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 999. [2021-02-23 23:00:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2021-02-23 23:00:17,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1358 transitions. [2021-02-23 23:00:17,751 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1358 transitions. Word has length 84 [2021-02-23 23:00:17,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:17,752 INFO L480 AbstractCegarLoop]: Abstraction has 999 states and 1358 transitions. [2021-02-23 23:00:17,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:17,752 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1358 transitions. [2021-02-23 23:00:17,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-02-23 23:00:17,754 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:17,754 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] [2021-02-23 23:00:17,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 23:00:17,754 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:17,755 INFO L82 PathProgramCache]: Analyzing trace with hash 161727264, now seen corresponding path program 1 times [2021-02-23 23:00:17,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:17,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690326821] [2021-02-23 23:00:17,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:17,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:17,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:17,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:17,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:17,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:17,800 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:17,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:17,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:17,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:17,836 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 23:00:17,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690326821] [2021-02-23 23:00:17,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:17,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:17,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372654432] [2021-02-23 23:00:17,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:17,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:17,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:17,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:17,838 INFO L87 Difference]: Start difference. First operand 999 states and 1358 transitions. Second operand 4 states. [2021-02-23 23:00:18,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:18,412 INFO L93 Difference]: Finished difference Result 1219 states and 1672 transitions. [2021-02-23 23:00:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:18,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2021-02-23 23:00:18,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:18,421 INFO L225 Difference]: With dead ends: 1219 [2021-02-23 23:00:18,421 INFO L226 Difference]: Without dead ends: 1217 [2021-02-23 23:00:18,422 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 23:00:18,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-02-23 23:00:18,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 999. [2021-02-23 23:00:18,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2021-02-23 23:00:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1350 transitions. [2021-02-23 23:00:18,635 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1350 transitions. Word has length 85 [2021-02-23 23:00:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:18,635 INFO L480 AbstractCegarLoop]: Abstraction has 999 states and 1350 transitions. [2021-02-23 23:00:18,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1350 transitions. [2021-02-23 23:00:18,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-02-23 23:00:18,638 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:18,638 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] [2021-02-23 23:00:18,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 23:00:18,639 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:18,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:18,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2096220639, now seen corresponding path program 1 times [2021-02-23 23:00:18,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:18,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806749200] [2021-02-23 23:00:18,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:18,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:18,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:18,676 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:18,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:18,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:18,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:18,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:18,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:18,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:18,724 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 23:00:18,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806749200] [2021-02-23 23:00:18,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:18,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:18,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41395873] [2021-02-23 23:00:18,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:18,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:18,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:18,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:18,727 INFO L87 Difference]: Start difference. First operand 999 states and 1350 transitions. Second operand 4 states. [2021-02-23 23:00:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:19,382 INFO L93 Difference]: Finished difference Result 2843 states and 3880 transitions. [2021-02-23 23:00:19,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:19,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2021-02-23 23:00:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:19,393 INFO L225 Difference]: With dead ends: 2843 [2021-02-23 23:00:19,393 INFO L226 Difference]: Without dead ends: 1897 [2021-02-23 23:00:19,396 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 23:00:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2021-02-23 23:00:19,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 1895. [2021-02-23 23:00:19,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1895 states. [2021-02-23 23:00:19,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 2550 transitions. [2021-02-23 23:00:19,684 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 2550 transitions. Word has length 85 [2021-02-23 23:00:19,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:19,684 INFO L480 AbstractCegarLoop]: Abstraction has 1895 states and 2550 transitions. [2021-02-23 23:00:19,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:19,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 2550 transitions. [2021-02-23 23:00:19,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-02-23 23:00:19,687 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:19,687 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] [2021-02-23 23:00:19,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 23:00:19,688 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:19,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:19,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1500034665, now seen corresponding path program 1 times [2021-02-23 23:00:19,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:19,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716681406] [2021-02-23 23:00:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:19,715 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:19,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:19,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:19,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:19,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:19,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:19,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:19,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:19,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:19,756 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 23:00:19,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716681406] [2021-02-23 23:00:19,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:19,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:19,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695223670] [2021-02-23 23:00:19,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:19,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:19,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:19,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:19,759 INFO L87 Difference]: Start difference. First operand 1895 states and 2550 transitions. Second operand 4 states. [2021-02-23 23:00:20,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:20,562 INFO L93 Difference]: Finished difference Result 2299 states and 3112 transitions. [2021-02-23 23:00:20,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:20,563 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2021-02-23 23:00:20,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:20,576 INFO L225 Difference]: With dead ends: 2299 [2021-02-23 23:00:20,577 INFO L226 Difference]: Without dead ends: 2297 [2021-02-23 23:00:20,578 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 23:00:20,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-02-23 23:00:20,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1895. [2021-02-23 23:00:20,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1895 states. [2021-02-23 23:00:20,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 2534 transitions. [2021-02-23 23:00:20,908 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 2534 transitions. Word has length 86 [2021-02-23 23:00:20,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:20,909 INFO L480 AbstractCegarLoop]: Abstraction has 1895 states and 2534 transitions. [2021-02-23 23:00:20,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:20,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 2534 transitions. [2021-02-23 23:00:20,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-02-23 23:00:20,911 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:20,912 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] [2021-02-23 23:00:20,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 23:00:20,912 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:20,913 INFO L82 PathProgramCache]: Analyzing trace with hash 558575793, now seen corresponding path program 1 times [2021-02-23 23:00:20,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:20,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225751379] [2021-02-23 23:00:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:20,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:20,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:20,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:20,935 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:20,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:20,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:20,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:20,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:20,968 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:20,975 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 23:00:20,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225751379] [2021-02-23 23:00:20,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:20,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:20,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171627461] [2021-02-23 23:00:20,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:20,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:20,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:20,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:20,978 INFO L87 Difference]: Start difference. First operand 1895 states and 2534 transitions. Second operand 4 states. [2021-02-23 23:00:21,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:21,981 INFO L93 Difference]: Finished difference Result 5483 states and 7368 transitions. [2021-02-23 23:00:21,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:21,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2021-02-23 23:00:21,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:22,001 INFO L225 Difference]: With dead ends: 5483 [2021-02-23 23:00:22,002 INFO L226 Difference]: Without dead ends: 3641 [2021-02-23 23:00:22,008 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 23:00:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3641 states. [2021-02-23 23:00:22,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3641 to 3639. [2021-02-23 23:00:22,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3639 states. [2021-02-23 23:00:22,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 4822 transitions. [2021-02-23 23:00:22,539 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 4822 transitions. Word has length 86 [2021-02-23 23:00:22,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:22,539 INFO L480 AbstractCegarLoop]: Abstraction has 3639 states and 4822 transitions. [2021-02-23 23:00:22,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:22,540 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 4822 transitions. [2021-02-23 23:00:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-02-23 23:00:22,544 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:22,544 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 23:00:22,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 23:00:22,544 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:22,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:22,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1475046540, now seen corresponding path program 1 times [2021-02-23 23:00:22,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:22,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908288746] [2021-02-23 23:00:22,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:22,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:22,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:22,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:22,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:22,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:22,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:22,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:22,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:22,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:22,630 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 23:00:22,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908288746] [2021-02-23 23:00:22,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:22,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:22,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832121927] [2021-02-23 23:00:22,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:22,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:22,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:22,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:22,633 INFO L87 Difference]: Start difference. First operand 3639 states and 4822 transitions. Second operand 4 states. [2021-02-23 23:00:23,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:23,587 INFO L93 Difference]: Finished difference Result 4379 states and 5816 transitions. [2021-02-23 23:00:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:23,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2021-02-23 23:00:23,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:23,613 INFO L225 Difference]: With dead ends: 4379 [2021-02-23 23:00:23,613 INFO L226 Difference]: Without dead ends: 4377 [2021-02-23 23:00:23,615 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 23:00:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4377 states. [2021-02-23 23:00:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4377 to 3639. [2021-02-23 23:00:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3639 states. [2021-02-23 23:00:24,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 4790 transitions. [2021-02-23 23:00:24,256 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 4790 transitions. Word has length 87 [2021-02-23 23:00:24,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:24,257 INFO L480 AbstractCegarLoop]: Abstraction has 3639 states and 4790 transitions. [2021-02-23 23:00:24,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 4790 transitions. [2021-02-23 23:00:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-02-23 23:00:24,262 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:24,262 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 23:00:24,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 23:00:24,262 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:24,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:24,263 INFO L82 PathProgramCache]: Analyzing trace with hash 136226195, now seen corresponding path program 1 times [2021-02-23 23:00:24,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:24,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599777405] [2021-02-23 23:00:24,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:24,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:24,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:24,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:24,285 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:24,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:24,289 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:24,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:24,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:24,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:24,324 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 23:00:24,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599777405] [2021-02-23 23:00:24,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:24,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:24,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351107499] [2021-02-23 23:00:24,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:24,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:24,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:24,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:24,326 INFO L87 Difference]: Start difference. First operand 3639 states and 4790 transitions. Second operand 4 states. [2021-02-23 23:00:25,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:25,492 INFO L93 Difference]: Finished difference Result 10619 states and 14008 transitions. [2021-02-23 23:00:25,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:25,493 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2021-02-23 23:00:25,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:25,528 INFO L225 Difference]: With dead ends: 10619 [2021-02-23 23:00:25,528 INFO L226 Difference]: Without dead ends: 7033 [2021-02-23 23:00:25,540 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 23:00:25,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7033 states. [2021-02-23 23:00:26,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7033 to 7031. [2021-02-23 23:00:26,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7031 states. [2021-02-23 23:00:26,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7031 states to 7031 states and 9142 transitions. [2021-02-23 23:00:26,662 INFO L78 Accepts]: Start accepts. Automaton has 7031 states and 9142 transitions. Word has length 87 [2021-02-23 23:00:26,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:26,662 INFO L480 AbstractCegarLoop]: Abstraction has 7031 states and 9142 transitions. [2021-02-23 23:00:26,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:26,663 INFO L276 IsEmpty]: Start isEmpty. Operand 7031 states and 9142 transitions. [2021-02-23 23:00:26,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-23 23:00:26,670 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:26,670 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 23:00:26,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 23:00:26,671 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:26,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:26,671 INFO L82 PathProgramCache]: Analyzing trace with hash -71709083, now seen corresponding path program 1 times [2021-02-23 23:00:26,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:26,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594505243] [2021-02-23 23:00:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:26,694 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 23:00:26,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:26,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:26,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:26,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:26,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:26,734 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:26,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:26,746 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 23:00:26,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594505243] [2021-02-23 23:00:26,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:26,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:26,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153704670] [2021-02-23 23:00:26,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:26,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:26,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:26,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:26,749 INFO L87 Difference]: Start difference. First operand 7031 states and 9142 transitions. Second operand 4 states. [2021-02-23 23:00:28,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:28,772 INFO L93 Difference]: Finished difference Result 20603 states and 26808 transitions. [2021-02-23 23:00:28,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:28,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2021-02-23 23:00:28,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:28,815 INFO L225 Difference]: With dead ends: 20603 [2021-02-23 23:00:28,816 INFO L226 Difference]: Without dead ends: 13625 [2021-02-23 23:00:28,838 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 23:00:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13625 states. [2021-02-23 23:00:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13625 to 13623. [2021-02-23 23:00:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13623 states. [2021-02-23 23:00:30,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13623 states to 13623 states and 17462 transitions. [2021-02-23 23:00:30,507 INFO L78 Accepts]: Start accepts. Automaton has 13623 states and 17462 transitions. Word has length 88 [2021-02-23 23:00:30,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:30,507 INFO L480 AbstractCegarLoop]: Abstraction has 13623 states and 17462 transitions. [2021-02-23 23:00:30,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:30,508 INFO L276 IsEmpty]: Start isEmpty. Operand 13623 states and 17462 transitions. [2021-02-23 23:00:30,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-23 23:00:30,519 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:30,520 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 23:00:30,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-23 23:00:30,520 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:30,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:30,521 INFO L82 PathProgramCache]: Analyzing trace with hash -700414293, now seen corresponding path program 1 times [2021-02-23 23:00:30,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:30,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764869595] [2021-02-23 23:00:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:30,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:30,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:30,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:30,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:30,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:30,550 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:30,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:30,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:30,582 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:30,594 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 23:00:30,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764869595] [2021-02-23 23:00:30,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:30,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:30,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062942386] [2021-02-23 23:00:30,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:30,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:30,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:30,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:30,596 INFO L87 Difference]: Start difference. First operand 13623 states and 17462 transitions. Second operand 4 states. [2021-02-23 23:00:33,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:33,086 INFO L93 Difference]: Finished difference Result 16187 states and 20664 transitions. [2021-02-23 23:00:33,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:33,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2021-02-23 23:00:33,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:33,132 INFO L225 Difference]: With dead ends: 16187 [2021-02-23 23:00:33,132 INFO L226 Difference]: Without dead ends: 16185 [2021-02-23 23:00:33,141 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 23:00:33,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16185 states. [2021-02-23 23:00:34,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16185 to 13623. [2021-02-23 23:00:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13623 states. [2021-02-23 23:00:34,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13623 states to 13623 states and 17334 transitions. [2021-02-23 23:00:34,750 INFO L78 Accepts]: Start accepts. Automaton has 13623 states and 17334 transitions. Word has length 88 [2021-02-23 23:00:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:34,750 INFO L480 AbstractCegarLoop]: Abstraction has 13623 states and 17334 transitions. [2021-02-23 23:00:34,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 13623 states and 17334 transitions. [2021-02-23 23:00:34,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-23 23:00:34,763 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:34,763 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 23:00:34,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-23 23:00:34,764 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:34,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:34,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1838349256, now seen corresponding path program 1 times [2021-02-23 23:00:34,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:34,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089433229] [2021-02-23 23:00:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:34,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:34,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:34,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:34,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:34,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:34,792 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:34,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:34,820 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:34,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:34,828 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 23:00:34,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089433229] [2021-02-23 23:00:34,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:34,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:34,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811884207] [2021-02-23 23:00:34,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:34,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:34,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:34,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:34,831 INFO L87 Difference]: Start difference. First operand 13623 states and 17334 transitions. Second operand 4 states. [2021-02-23 23:00:37,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:37,412 INFO L93 Difference]: Finished difference Result 16059 states and 20280 transitions. [2021-02-23 23:00:37,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:37,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2021-02-23 23:00:37,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:37,458 INFO L225 Difference]: With dead ends: 16059 [2021-02-23 23:00:37,458 INFO L226 Difference]: Without dead ends: 16057 [2021-02-23 23:00:37,471 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 23:00:37,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16057 states. [2021-02-23 23:00:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16057 to 13623. [2021-02-23 23:00:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13623 states. [2021-02-23 23:00:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13623 states to 13623 states and 17206 transitions. [2021-02-23 23:00:39,132 INFO L78 Accepts]: Start accepts. Automaton has 13623 states and 17206 transitions. Word has length 89 [2021-02-23 23:00:39,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:39,133 INFO L480 AbstractCegarLoop]: Abstraction has 13623 states and 17206 transitions. [2021-02-23 23:00:39,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:39,133 INFO L276 IsEmpty]: Start isEmpty. Operand 13623 states and 17206 transitions. [2021-02-23 23:00:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-23 23:00:39,143 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:39,143 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 23:00:39,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-23 23:00:39,143 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:39,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:39,144 INFO L82 PathProgramCache]: Analyzing trace with hash 2072232263, now seen corresponding path program 1 times [2021-02-23 23:00:39,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:39,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043174795] [2021-02-23 23:00:39,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:39,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:39,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:39,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:39,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:39,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:39,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:39,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:39,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:39,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:39,200 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 23:00:39,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043174795] [2021-02-23 23:00:39,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:39,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:39,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217278887] [2021-02-23 23:00:39,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:39,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:39,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:39,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:39,203 INFO L87 Difference]: Start difference. First operand 13623 states and 17206 transitions. Second operand 4 states. [2021-02-23 23:00:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:42,329 INFO L93 Difference]: Finished difference Result 39995 states and 50488 transitions. [2021-02-23 23:00:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:42,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2021-02-23 23:00:42,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:42,398 INFO L225 Difference]: With dead ends: 39995 [2021-02-23 23:00:42,398 INFO L226 Difference]: Without dead ends: 26425 [2021-02-23 23:00:42,444 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 23:00:42,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26425 states. [2021-02-23 23:00:45,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26425 to 26423. [2021-02-23 23:00:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26423 states. [2021-02-23 23:00:45,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26423 states to 26423 states and 32822 transitions. [2021-02-23 23:00:45,935 INFO L78 Accepts]: Start accepts. Automaton has 26423 states and 32822 transitions. Word has length 89 [2021-02-23 23:00:45,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:45,935 INFO L480 AbstractCegarLoop]: Abstraction has 26423 states and 32822 transitions. [2021-02-23 23:00:45,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:45,935 INFO L276 IsEmpty]: Start isEmpty. Operand 26423 states and 32822 transitions. [2021-02-23 23:00:45,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-23 23:00:45,952 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:45,952 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 23:00:45,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-23 23:00:45,952 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:45,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:45,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1064358977, now seen corresponding path program 1 times [2021-02-23 23:00:45,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:45,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210740774] [2021-02-23 23:00:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:45,980 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:45,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:45,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:45,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:45,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:45,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:46,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:46,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:46,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:46,021 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 23:00:46,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210740774] [2021-02-23 23:00:46,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:46,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:46,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12566039] [2021-02-23 23:00:46,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:46,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:46,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:46,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:46,025 INFO L87 Difference]: Start difference. First operand 26423 states and 32822 transitions. Second operand 4 states. [2021-02-23 23:00:49,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:00:49,902 INFO L93 Difference]: Finished difference Result 30779 states and 37688 transitions. [2021-02-23 23:00:49,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:00:49,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2021-02-23 23:00:49,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:00:49,945 INFO L225 Difference]: With dead ends: 30779 [2021-02-23 23:00:49,946 INFO L226 Difference]: Without dead ends: 30777 [2021-02-23 23:00:49,957 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 23:00:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30777 states. [2021-02-23 23:00:53,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30777 to 26423. [2021-02-23 23:00:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26423 states. [2021-02-23 23:00:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26423 states to 26423 states and 32566 transitions. [2021-02-23 23:00:53,498 INFO L78 Accepts]: Start accepts. Automaton has 26423 states and 32566 transitions. Word has length 90 [2021-02-23 23:00:53,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:00:53,499 INFO L480 AbstractCegarLoop]: Abstraction has 26423 states and 32566 transitions. [2021-02-23 23:00:53,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:00:53,499 INFO L276 IsEmpty]: Start isEmpty. Operand 26423 states and 32566 transitions. [2021-02-23 23:00:53,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-23 23:00:53,510 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:00:53,510 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 23:00:53,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-23 23:00:53,510 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:00:53,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:00:53,511 INFO L82 PathProgramCache]: Analyzing trace with hash -185062375, now seen corresponding path program 1 times [2021-02-23 23:00:53,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:00:53,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307593562] [2021-02-23 23:00:53,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:00:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:53,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:53,530 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:53,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:53,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:00:53,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:53,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:53,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:00:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:00:53,561 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:00:53,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:00:53,567 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 23:00:53,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307593562] [2021-02-23 23:00:53,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:00:53,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:00:53,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419653927] [2021-02-23 23:00:53,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:00:53,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:00:53,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:00:53,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:00:53,569 INFO L87 Difference]: Start difference. First operand 26423 states and 32566 transitions. Second operand 4 states. [2021-02-23 23:01:00,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:01:00,557 INFO L93 Difference]: Finished difference Result 77625 states and 95543 transitions. [2021-02-23 23:01:00,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:01:00,557 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2021-02-23 23:01:00,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:01:00,592 INFO L225 Difference]: With dead ends: 77625 [2021-02-23 23:01:00,592 INFO L226 Difference]: Without dead ends: 26423 [2021-02-23 23:01:00,672 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 23:01:00,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26423 states. [2021-02-23 23:01:04,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26423 to 26423. [2021-02-23 23:01:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26423 states. [2021-02-23 23:01:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26423 states to 26423 states and 31542 transitions. [2021-02-23 23:01:04,062 INFO L78 Accepts]: Start accepts. Automaton has 26423 states and 31542 transitions. Word has length 90 [2021-02-23 23:01:04,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:01:04,062 INFO L480 AbstractCegarLoop]: Abstraction has 26423 states and 31542 transitions. [2021-02-23 23:01:04,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:01:04,062 INFO L276 IsEmpty]: Start isEmpty. Operand 26423 states and 31542 transitions. [2021-02-23 23:01:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-02-23 23:01:04,074 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:01:04,074 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 23:01:04,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-23 23:01:04,074 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:01:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:01:04,075 INFO L82 PathProgramCache]: Analyzing trace with hash -854000612, now seen corresponding path program 1 times [2021-02-23 23:01:04,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:01:04,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969535215] [2021-02-23 23:01:04,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:01:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:01:04,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:01:04,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:01:04,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:01:04,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:01:04,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:01:04,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:01:04,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:01:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:01:04,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:01:04,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:01:04,144 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 23:01:04,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969535215] [2021-02-23 23:01:04,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:01:04,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:01:04,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631168664] [2021-02-23 23:01:04,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:01:04,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:01:04,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:01:04,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:01:04,147 INFO L87 Difference]: Start difference. First operand 26423 states and 31542 transitions. Second operand 4 states. [2021-02-23 23:01:07,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:01:07,436 INFO L93 Difference]: Finished difference Result 26423 states and 31542 transitions. [2021-02-23 23:01:07,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:01:07,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2021-02-23 23:01:07,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:01:07,437 INFO L225 Difference]: With dead ends: 26423 [2021-02-23 23:01:07,438 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 23:01:07,477 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 23:01:07,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 23:01:07,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 23:01:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 23:01:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 23:01:07,478 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 91 [2021-02-23 23:01:07,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:01:07,478 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 23:01:07,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:01:07,478 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 23:01:07,478 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 23:01:07,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-23 23:01:07,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 23:01:10,555 WARN L202 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 1085 DAG size of output: 65 [2021-02-23 23:01:21,633 WARN L202 SmtUtils]: Spent 11.06 s on a formula simplification. DAG size of input: 2619 DAG size of output: 31 [2021-02-23 23:01:21,960 WARN L202 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 31 [2021-02-23 23:01:24,266 WARN L202 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 1286 DAG size of output: 65 [2021-02-23 23:01:25,709 WARN L202 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 964 DAG size of output: 47 [2021-02-23 23:01:31,532 WARN L202 SmtUtils]: Spent 5.82 s on a formula simplification. DAG size of input: 2308 DAG size of output: 34 [2021-02-23 23:01:33,471 WARN L202 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 1089 DAG size of output: 121 [2021-02-23 23:01:33,796 WARN L202 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 45 [2021-02-23 23:01:41,247 WARN L202 SmtUtils]: Spent 7.45 s on a formula simplification. DAG size of input: 1100 DAG size of output: 581 [2021-02-23 23:01:42,380 WARN L202 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 592 DAG size of output: 191 [2021-02-23 23:01:42,984 WARN L202 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 87 [2021-02-23 23:01:55,106 WARN L202 SmtUtils]: Spent 12.11 s on a formula simplification. DAG size of input: 2793 DAG size of output: 31 [2021-02-23 23:01:59,493 WARN L202 SmtUtils]: Spent 4.38 s on a formula simplification. DAG size of input: 1093 DAG size of output: 321 [2021-02-23 23:01:59,889 WARN L202 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 65 [2021-02-23 23:02:03,859 WARN L202 SmtUtils]: Spent 3.96 s on a formula simplification. DAG size of input: 1670 DAG size of output: 53 [2021-02-23 23:02:08,874 WARN L202 SmtUtils]: Spent 5.01 s on a formula simplification. DAG size of input: 1540 DAG size of output: 41 [2021-02-23 23:02:15,135 WARN L202 SmtUtils]: Spent 6.25 s on a formula simplification. DAG size of input: 2233 DAG size of output: 31 [2021-02-23 23:02:28,895 WARN L202 SmtUtils]: Spent 13.75 s on a formula simplification that was a NOOP. DAG size: 1097 [2021-02-23 23:02:33,131 WARN L202 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 1106 DAG size of output: 321 [2021-02-23 23:02:33,812 WARN L202 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 575 DAG size of output: 121 [2021-02-23 23:02:34,619 WARN L202 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 123 [2021-02-23 23:02:35,236 WARN L202 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 676 DAG size of output: 67 [2021-02-23 23:02:36,345 WARN L202 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 1079 DAG size of output: 39 [2021-02-23 23:02:51,312 WARN L202 SmtUtils]: Spent 14.95 s on a formula simplification. DAG size of input: 2820 DAG size of output: 31 [2021-02-23 23:02:52,424 WARN L202 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 1076 DAG size of output: 31 [2021-02-23 23:02:54,294 WARN L202 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 579 DAG size of output: 321 [2021-02-23 23:03:00,972 WARN L202 SmtUtils]: Spent 6.67 s on a formula simplification. DAG size of input: 2054 DAG size of output: 45 [2021-02-23 23:03:04,687 WARN L202 SmtUtils]: Spent 3.71 s on a formula simplification that was a NOOP. DAG size: 583 [2021-02-23 23:03:10,266 WARN L202 SmtUtils]: Spent 5.57 s on a formula simplification. DAG size of input: 2308 DAG size of output: 34 [2021-02-23 23:03:24,943 WARN L202 SmtUtils]: Spent 14.67 s on a formula simplification. DAG size of input: 2820 DAG size of output: 31 [2021-02-23 23:03:26,138 WARN L202 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 1083 DAG size of output: 53 [2021-02-23 23:03:37,142 WARN L202 SmtUtils]: Spent 11.00 s on a formula simplification. DAG size of input: 2767 DAG size of output: 31 [2021-02-23 23:03:39,893 WARN L202 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 1118 DAG size of output: 189 [2021-02-23 23:03:40,492 WARN L202 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 87 [2021-02-23 23:03:41,226 WARN L202 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 772 DAG size of output: 55 [2021-02-23 23:03:42,703 WARN L202 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 1087 DAG size of output: 85 [2021-02-23 23:03:46,694 WARN L202 SmtUtils]: Spent 3.99 s on a formula simplification. DAG size of input: 1847 DAG size of output: 31 [2021-02-23 23:03:46,994 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 565 DAG size of output: 39 [2021-02-23 23:04:02,822 WARN L202 SmtUtils]: Spent 15.82 s on a formula simplification. DAG size of input: 2822 DAG size of output: 39 [2021-02-23 23:04:04,826 WARN L202 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 586 DAG size of output: 323 [2021-02-23 23:04:18,860 WARN L202 SmtUtils]: Spent 14.02 s on a formula simplification. DAG size of input: 2815 DAG size of output: 31 [2021-02-23 23:04:21,362 WARN L202 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 1091 DAG size of output: 189 [2021-02-23 23:04:21,711 WARN L202 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 53 [2021-02-23 23:04:23,762 WARN L202 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 1142 DAG size of output: 121 [2021-02-23 23:04:24,333 WARN L202 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 676 DAG size of output: 67 [2021-02-23 23:04:25,726 WARN L202 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 964 DAG size of output: 47 [2021-02-23 23:04:35,918 WARN L202 SmtUtils]: Spent 10.18 s on a formula simplification. DAG size of input: 2717 DAG size of output: 31 [2021-02-23 23:04:43,297 WARN L202 SmtUtils]: Spent 7.37 s on a formula simplification. DAG size of input: 1095 DAG size of output: 581 [2021-02-23 23:04:43,788 WARN L202 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 85 [2021-02-23 23:04:47,540 WARN L202 SmtUtils]: Spent 3.75 s on a formula simplification that was a NOOP. DAG size: 583 [2021-02-23 23:05:02,446 WARN L202 SmtUtils]: Spent 14.90 s on a formula simplification. DAG size of input: 2820 DAG size of output: 31 [2021-02-23 23:05:03,600 WARN L202 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 592 DAG size of output: 191 [2021-02-23 23:05:18,642 WARN L202 SmtUtils]: Spent 15.03 s on a formula simplification. DAG size of input: 2820 DAG size of output: 31 [2021-02-23 23:05:33,684 WARN L202 SmtUtils]: Spent 15.03 s on a formula simplification. DAG size of input: 2820 DAG size of output: 31 [2021-02-23 23:05:48,415 WARN L202 SmtUtils]: Spent 14.72 s on a formula simplification. DAG size of input: 2820 DAG size of output: 31 [2021-02-23 23:05:49,498 WARN L202 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 1076 DAG size of output: 31 [2021-02-23 23:05:50,504 WARN L202 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 577 DAG size of output: 189 [2021-02-23 23:05:52,262 WARN L202 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 1190 DAG size of output: 85 [2021-02-23 23:05:52,994 WARN L202 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 772 DAG size of output: 55 [2021-02-23 23:05:58,022 WARN L202 SmtUtils]: Spent 5.02 s on a formula simplification. DAG size of input: 1540 DAG size of output: 41 [2021-02-23 23:05:59,184 WARN L202 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 1081 DAG size of output: 45 [2021-02-23 23:06:12,261 WARN L202 SmtUtils]: Spent 13.07 s on a formula simplification. DAG size of input: 2807 DAG size of output: 31 [2021-02-23 23:06:15,794 WARN L202 SmtUtils]: Spent 3.53 s on a formula simplification that was a NOOP. DAG size: 581 [2021-02-23 23:06:17,772 WARN L202 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 586 DAG size of output: 323 [2021-02-23 23:06:18,580 WARN L202 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 123 [2021-02-23 23:06:19,077 WARN L202 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-02-23 23:06:19,572 WARN L202 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-02-23 23:06:19,679 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 17 [2021-02-23 23:06:22,838 WARN L202 SmtUtils]: Spent 3.14 s on a formula simplification. DAG size of input: 111 DAG size of output: 91 [2021-02-23 23:06:22,945 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 15 [2021-02-23 23:07:41,022 WARN L202 SmtUtils]: Spent 1.30 m on a formula simplification. DAG size of input: 571 DAG size of output: 551 [2021-02-23 23:07:50,238 WARN L202 SmtUtils]: Spent 9.21 s on a formula simplification. DAG size of input: 181 DAG size of output: 161 [2021-02-23 23:07:51,681 WARN L202 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-02-23 23:08:15,892 WARN L202 SmtUtils]: Spent 24.19 s on a formula simplification. DAG size of input: 311 DAG size of output: 291 [2021-02-23 23:08:16,436 WARN L202 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-02-23 23:08:16,674 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-02-23 23:12:43,448 WARN L202 SmtUtils]: Spent 4.44 m on a formula simplification. DAG size of input: 1087 DAG size of output: 1067 [2021-02-23 23:13:07,630 WARN L202 SmtUtils]: Spent 24.17 s on a formula simplification. DAG size of input: 311 DAG size of output: 291 [2021-02-23 23:13:10,750 WARN L202 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 111 DAG size of output: 91 [2021-02-23 23:13:14,244 WARN L202 SmtUtils]: Spent 3.48 s on a formula simplification. DAG size of input: 113 DAG size of output: 93 [2021-02-23 23:13:14,868 WARN L202 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-02-23 23:13:39,060 WARN L202 SmtUtils]: Spent 24.12 s on a formula simplification. DAG size of input: 311 DAG size of output: 291 [2021-02-23 23:13:39,169 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 15