/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:35:46,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:35:46,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:35:46,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:35:46,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:35:46,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:35:46,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:35:46,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:35:46,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:35:46,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:35:46,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:35:46,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:35:46,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:35:46,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:35:46,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:35:46,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:35:46,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:35:46,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:35:46,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:35:46,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:35:46,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:35:46,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:35:46,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:35:46,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:35:46,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:35:46,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:35:46,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:35:46,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:35:46,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:35:46,936 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:35:46,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:35:46,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:35:46,941 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:35:46,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:35:46,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:35:46,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:35:46,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:35:46,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:35:46,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:35:46,944 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:35:46,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:35:46,944 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:35:46,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:35:46,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:35:46,945 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:35:46,945 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:35:46,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:35:46,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:35:46,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:35:46,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:35:46,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:35:46,946 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:35:47,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:35:47,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:35:47,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:35:47,414 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:35:47,415 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:35:47,416 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-11-07 06:35:47,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66b99a526/cbfce031ff2c4990ae07a7dd185e21f8/FLAGb8f309fa2 [2020-11-07 06:35:48,006 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:35:48,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-11-07 06:35:48,014 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66b99a526/cbfce031ff2c4990ae07a7dd185e21f8/FLAGb8f309fa2 [2020-11-07 06:35:48,379 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66b99a526/cbfce031ff2c4990ae07a7dd185e21f8 [2020-11-07 06:35:48,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:35:48,390 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:35:48,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:48,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:35:48,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:35:48,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57291191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48, skipping insertion in model container [2020-11-07 06:35:48,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:35:48,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:35:48,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:48,673 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:35:48,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:48,707 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:35:48,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48 WrapperNode [2020-11-07 06:35:48,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:48,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:35:48,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:35:48,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:35:48,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:35:48,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:35:48,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:35:48,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:35:48,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:35:48,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:35:48,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:35:48,846 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:35:48,846 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:35:48,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:35:48,846 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:35:48,846 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:35:48,847 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 06:35:48,847 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 06:35:48,847 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:35:48,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:35:48,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:35:48,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:35:48,848 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:35:48,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:35:48,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:35:48,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:35:48,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:35:48,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:35:48,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:35:49,137 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:35:49,138 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-07 06:35:49,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:49 BoogieIcfgContainer [2020-11-07 06:35:49,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:35:49,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:35:49,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:35:49,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:35:49,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:35:48" (1/3) ... [2020-11-07 06:35:49,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f0181a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:49, skipping insertion in model container [2020-11-07 06:35:49,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (2/3) ... [2020-11-07 06:35:49,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f0181a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:49, skipping insertion in model container [2020-11-07 06:35:49,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:49" (3/3) ... [2020-11-07 06:35:49,153 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-11-07 06:35:49,190 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:35:49,197 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:35:49,231 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:35:49,292 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:35:49,292 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:35:49,292 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:35:49,292 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:35:49,293 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:35:49,293 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:35:49,293 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:35:49,293 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:35:49,336 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-11-07 06:35:49,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-07 06:35:49,351 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:49,352 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] [2020-11-07 06:35:49,353 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:49,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:49,360 INFO L82 PathProgramCache]: Analyzing trace with hash -234938568, now seen corresponding path program 1 times [2020-11-07 06:35:49,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:49,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257843475] [2020-11-07 06:35:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:49,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:49,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257843475] [2020-11-07 06:35:49,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:49,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:35:49,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749292670] [2020-11-07 06:35:49,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:35:49,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:49,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:35:49,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:35:49,677 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 3 states. [2020-11-07 06:35:49,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:49,916 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-11-07 06:35:49,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:35:49,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-11-07 06:35:49,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:49,933 INFO L225 Difference]: With dead ends: 73 [2020-11-07 06:35:49,933 INFO L226 Difference]: Without dead ends: 37 [2020-11-07 06:35:49,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:35:49,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-07 06:35:50,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-07 06:35:50,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-07 06:35:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-11-07 06:35:50,017 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 23 [2020-11-07 06:35:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:50,018 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-11-07 06:35:50,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:35:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-11-07 06:35:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-07 06:35:50,021 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:50,022 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] [2020-11-07 06:35:50,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:35:50,023 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:50,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:50,024 INFO L82 PathProgramCache]: Analyzing trace with hash 872969255, now seen corresponding path program 1 times [2020-11-07 06:35:50,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:50,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104919676] [2020-11-07 06:35:50,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:50,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:50,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104919676] [2020-11-07 06:35:50,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:50,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 06:35:50,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874238080] [2020-11-07 06:35:50,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 06:35:50,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:50,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 06:35:50,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 06:35:50,239 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 4 states. [2020-11-07 06:35:50,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:50,445 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-11-07 06:35:50,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 06:35:50,447 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-07 06:35:50,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:50,450 INFO L225 Difference]: With dead ends: 67 [2020-11-07 06:35:50,451 INFO L226 Difference]: Without dead ends: 51 [2020-11-07 06:35:50,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 06:35:50,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-07 06:35:50,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2020-11-07 06:35:50,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-07 06:35:50,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-11-07 06:35:50,479 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 25 [2020-11-07 06:35:50,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:50,480 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-11-07 06:35:50,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 06:35:50,480 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-11-07 06:35:50,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-07 06:35:50,482 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:50,482 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] [2020-11-07 06:35:50,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:35:50,483 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:50,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:50,484 INFO L82 PathProgramCache]: Analyzing trace with hash -568340233, now seen corresponding path program 1 times [2020-11-07 06:35:50,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:50,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678056610] [2020-11-07 06:35:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:50,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:50,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678056610] [2020-11-07 06:35:50,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:50,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-07 06:35:50,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885404609] [2020-11-07 06:35:50,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:35:50,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:50,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:35:50,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:35:50,662 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 6 states. [2020-11-07 06:35:50,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:50,793 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-11-07 06:35:50,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 06:35:50,794 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-11-07 06:35:50,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:50,795 INFO L225 Difference]: With dead ends: 78 [2020-11-07 06:35:50,796 INFO L226 Difference]: Without dead ends: 58 [2020-11-07 06:35:50,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:35:50,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-07 06:35:50,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-11-07 06:35:50,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-07 06:35:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-11-07 06:35:50,806 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 32 [2020-11-07 06:35:50,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:50,807 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-11-07 06:35:50,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:35:50,807 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-11-07 06:35:50,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-07 06:35:50,808 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:50,809 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:50,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:35:50,809 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:50,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:50,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1329424935, now seen corresponding path program 2 times [2020-11-07 06:35:50,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:50,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323138686] [2020-11-07 06:35:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:50,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:50,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323138686] [2020-11-07 06:35:50,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:50,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 06:35:50,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156501699] [2020-11-07 06:35:50,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:35:50,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:50,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:35:50,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:35:50,935 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 6 states. [2020-11-07 06:35:51,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:51,131 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-11-07 06:35:51,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 06:35:51,132 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-11-07 06:35:51,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:51,133 INFO L225 Difference]: With dead ends: 57 [2020-11-07 06:35:51,133 INFO L226 Difference]: Without dead ends: 49 [2020-11-07 06:35:51,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:35:51,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-07 06:35:51,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-11-07 06:35:51,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-07 06:35:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-11-07 06:35:51,144 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 39 [2020-11-07 06:35:51,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:51,145 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-11-07 06:35:51,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:35:51,145 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-11-07 06:35:51,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-07 06:35:51,146 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:51,147 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:51,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:35:51,147 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:51,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:51,148 INFO L82 PathProgramCache]: Analyzing trace with hash 821039234, now seen corresponding path program 1 times [2020-11-07 06:35:51,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:51,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160106680] [2020-11-07 06:35:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:51,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160106680] [2020-11-07 06:35:51,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:51,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-07 06:35:51,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840326847] [2020-11-07 06:35:51,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:35:51,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:51,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:35:51,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:35:51,265 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 8 states. [2020-11-07 06:35:51,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:51,473 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2020-11-07 06:35:51,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 06:35:51,474 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-11-07 06:35:51,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:51,475 INFO L225 Difference]: With dead ends: 69 [2020-11-07 06:35:51,475 INFO L226 Difference]: Without dead ends: 58 [2020-11-07 06:35:51,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:51,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-07 06:35:51,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-11-07 06:35:51,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-07 06:35:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-11-07 06:35:51,487 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 46 [2020-11-07 06:35:51,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:51,488 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-11-07 06:35:51,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:35:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-11-07 06:35:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-07 06:35:51,490 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:51,490 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:51,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:35:51,490 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:51,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:51,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1394712007, now seen corresponding path program 2 times [2020-11-07 06:35:51,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:51,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809697882] [2020-11-07 06:35:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:35:51,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809697882] [2020-11-07 06:35:51,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:51,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-07 06:35:51,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139676642] [2020-11-07 06:35:51,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:35:51,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:51,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:35:51,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:35:51,603 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 8 states. [2020-11-07 06:35:51,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:51,785 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-11-07 06:35:51,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 06:35:51,785 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-11-07 06:35:51,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:51,787 INFO L225 Difference]: With dead ends: 95 [2020-11-07 06:35:51,787 INFO L226 Difference]: Without dead ends: 68 [2020-11-07 06:35:51,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:51,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-07 06:35:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2020-11-07 06:35:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-07 06:35:51,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-11-07 06:35:51,805 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 53 [2020-11-07 06:35:51,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:51,805 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-11-07 06:35:51,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:35:51,805 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-11-07 06:35:51,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-07 06:35:51,806 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:51,807 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:51,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 06:35:51,809 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:51,809 INFO L82 PathProgramCache]: Analyzing trace with hash -876567913, now seen corresponding path program 3 times [2020-11-07 06:35:51,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:51,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765839827] [2020-11-07 06:35:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:35:51,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765839827] [2020-11-07 06:35:51,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:51,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 06:35:51,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359943155] [2020-11-07 06:35:51,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:35:51,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:51,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:35:51,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:35:51,975 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 10 states. [2020-11-07 06:35:52,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:52,199 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2020-11-07 06:35:52,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 06:35:52,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-11-07 06:35:52,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:52,201 INFO L225 Difference]: With dead ends: 102 [2020-11-07 06:35:52,202 INFO L226 Difference]: Without dead ends: 75 [2020-11-07 06:35:52,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:35:52,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-07 06:35:52,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-11-07 06:35:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-07 06:35:52,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-11-07 06:35:52,213 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 60 [2020-11-07 06:35:52,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:52,214 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-11-07 06:35:52,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:35:52,214 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-11-07 06:35:52,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-07 06:35:52,215 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:52,215 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:52,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 06:35:52,216 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:52,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:52,216 INFO L82 PathProgramCache]: Analyzing trace with hash 501846983, now seen corresponding path program 4 times [2020-11-07 06:35:52,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:52,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247602909] [2020-11-07 06:35:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:52,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:35:52,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247602909] [2020-11-07 06:35:52,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:52,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:35:52,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408372874] [2020-11-07 06:35:52,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:35:52,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:52,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:35:52,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:52,404 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 12 states. [2020-11-07 06:35:52,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:52,699 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2020-11-07 06:35:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 06:35:52,700 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-11-07 06:35:52,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:52,702 INFO L225 Difference]: With dead ends: 109 [2020-11-07 06:35:52,702 INFO L226 Difference]: Without dead ends: 82 [2020-11-07 06:35:52,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:35:52,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-07 06:35:52,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2020-11-07 06:35:52,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-07 06:35:52,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-11-07 06:35:52,715 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 67 [2020-11-07 06:35:52,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:52,715 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-11-07 06:35:52,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:35:52,715 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-11-07 06:35:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-07 06:35:52,716 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:52,717 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:52,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 06:35:52,717 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:52,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:52,718 INFO L82 PathProgramCache]: Analyzing trace with hash 70773911, now seen corresponding path program 5 times [2020-11-07 06:35:52,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:52,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555580672] [2020-11-07 06:35:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:52,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:35:52,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555580672] [2020-11-07 06:35:52,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:52,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-07 06:35:52,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744986900] [2020-11-07 06:35:52,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 06:35:52,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:52,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 06:35:52,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:35:52,912 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 14 states. [2020-11-07 06:35:53,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:53,297 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2020-11-07 06:35:53,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 06:35:53,298 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-11-07 06:35:53,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:53,300 INFO L225 Difference]: With dead ends: 116 [2020-11-07 06:35:53,301 INFO L226 Difference]: Without dead ends: 89 [2020-11-07 06:35:53,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-11-07 06:35:53,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-07 06:35:53,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2020-11-07 06:35:53,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-07 06:35:53,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-11-07 06:35:53,317 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 74 [2020-11-07 06:35:53,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:53,318 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-11-07 06:35:53,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 06:35:53,318 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-11-07 06:35:53,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-07 06:35:53,319 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:53,320 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:53,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 06:35:53,320 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:53,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:53,321 INFO L82 PathProgramCache]: Analyzing trace with hash -661976633, now seen corresponding path program 6 times [2020-11-07 06:35:53,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:53,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010402232] [2020-11-07 06:35:53,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:53,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:35:53,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010402232] [2020-11-07 06:35:53,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:53,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 06:35:53,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902468401] [2020-11-07 06:35:53,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 06:35:53,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:53,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 06:35:53,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:35:53,607 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 16 states. [2020-11-07 06:35:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:54,001 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2020-11-07 06:35:54,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 06:35:54,002 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2020-11-07 06:35:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:54,003 INFO L225 Difference]: With dead ends: 123 [2020-11-07 06:35:54,003 INFO L226 Difference]: Without dead ends: 96 [2020-11-07 06:35:54,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-11-07 06:35:54,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-07 06:35:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2020-11-07 06:35:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-07 06:35:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-11-07 06:35:54,026 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 81 [2020-11-07 06:35:54,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:54,026 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-11-07 06:35:54,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 06:35:54,027 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-11-07 06:35:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-07 06:35:54,033 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:54,033 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:54,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 06:35:54,034 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:54,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:54,035 INFO L82 PathProgramCache]: Analyzing trace with hash 220575383, now seen corresponding path program 7 times [2020-11-07 06:35:54,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:54,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468798610] [2020-11-07 06:35:54,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:54,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:35:54,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468798610] [2020-11-07 06:35:54,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:54,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 06:35:54,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219248231] [2020-11-07 06:35:54,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 06:35:54,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:54,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 06:35:54,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:35:54,323 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 18 states. [2020-11-07 06:35:54,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:54,753 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2020-11-07 06:35:54,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 06:35:54,754 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 88 [2020-11-07 06:35:54,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:54,755 INFO L225 Difference]: With dead ends: 130 [2020-11-07 06:35:54,755 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 06:35:54,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-11-07 06:35:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 06:35:54,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 06:35:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 06:35:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-11-07 06:35:54,784 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 88 [2020-11-07 06:35:54,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:54,788 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-11-07 06:35:54,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 06:35:54,788 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-11-07 06:35:54,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 06:35:54,792 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:54,792 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:54,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 06:35:54,793 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:54,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:54,794 INFO L82 PathProgramCache]: Analyzing trace with hash 140902343, now seen corresponding path program 8 times [2020-11-07 06:35:54,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:54,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911783361] [2020-11-07 06:35:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:55,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:35:55,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911783361] [2020-11-07 06:35:55,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:55,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-07 06:35:55,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080694274] [2020-11-07 06:35:55,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 06:35:55,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:55,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 06:35:55,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:35:55,145 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 20 states. [2020-11-07 06:35:55,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:55,661 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2020-11-07 06:35:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 06:35:55,661 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 95 [2020-11-07 06:35:55,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:55,663 INFO L225 Difference]: With dead ends: 137 [2020-11-07 06:35:55,663 INFO L226 Difference]: Without dead ends: 110 [2020-11-07 06:35:55,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 06:35:55,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-11-07 06:35:55,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2020-11-07 06:35:55,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-07 06:35:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-11-07 06:35:55,687 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 95 [2020-11-07 06:35:55,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:55,689 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-11-07 06:35:55,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 06:35:55,690 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-11-07 06:35:55,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-07 06:35:55,695 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:55,695 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:55,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 06:35:55,702 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:55,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:55,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1792409449, now seen corresponding path program 9 times [2020-11-07 06:35:55,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:55,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337880337] [2020-11-07 06:35:55,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:56,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:35:56,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337880337] [2020-11-07 06:35:56,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:56,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-11-07 06:35:56,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156475426] [2020-11-07 06:35:56,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 06:35:56,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:56,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 06:35:56,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-11-07 06:35:56,097 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 22 states. [2020-11-07 06:35:56,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:56,662 INFO L93 Difference]: Finished difference Result 144 states and 148 transitions. [2020-11-07 06:35:56,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-07 06:35:56,663 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 102 [2020-11-07 06:35:56,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:56,665 INFO L225 Difference]: With dead ends: 144 [2020-11-07 06:35:56,665 INFO L226 Difference]: Without dead ends: 117 [2020-11-07 06:35:56,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:35:56,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-11-07 06:35:56,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-11-07 06:35:56,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-07 06:35:56,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-11-07 06:35:56,679 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 102 [2020-11-07 06:35:56,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:56,679 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-11-07 06:35:56,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 06:35:56,679 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-11-07 06:35:56,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-11-07 06:35:56,683 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:56,683 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:56,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 06:35:56,683 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:56,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:56,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1255830983, now seen corresponding path program 10 times [2020-11-07 06:35:56,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:56,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016900828] [2020-11-07 06:35:56,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:57,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:35:57,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016900828] [2020-11-07 06:35:57,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:57,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-11-07 06:35:57,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793909020] [2020-11-07 06:35:57,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 06:35:57,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:57,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 06:35:57,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-11-07 06:35:57,194 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 24 states. [2020-11-07 06:35:57,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:57,913 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2020-11-07 06:35:57,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-07 06:35:57,914 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 109 [2020-11-07 06:35:57,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:57,916 INFO L225 Difference]: With dead ends: 151 [2020-11-07 06:35:57,916 INFO L226 Difference]: Without dead ends: 124 [2020-11-07 06:35:57,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 06:35:57,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-07 06:35:57,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2020-11-07 06:35:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-07 06:35:57,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-11-07 06:35:57,931 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 109 [2020-11-07 06:35:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:57,932 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-11-07 06:35:57,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 06:35:57,932 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-11-07 06:35:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-07 06:35:57,933 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:57,933 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:57,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 06:35:57,934 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:57,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:57,934 INFO L82 PathProgramCache]: Analyzing trace with hash 853854871, now seen corresponding path program 11 times [2020-11-07 06:35:57,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:57,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803892333] [2020-11-07 06:35:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:58,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:35:58,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803892333] [2020-11-07 06:35:58,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:58,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-11-07 06:35:58,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133658619] [2020-11-07 06:35:58,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 06:35:58,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:58,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 06:35:58,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-11-07 06:35:58,448 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 26 states. [2020-11-07 06:35:59,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:59,288 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-11-07 06:35:59,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-07 06:35:59,288 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 116 [2020-11-07 06:35:59,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:59,290 INFO L225 Difference]: With dead ends: 158 [2020-11-07 06:35:59,290 INFO L226 Difference]: Without dead ends: 131 [2020-11-07 06:35:59,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 06:35:59,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-07 06:35:59,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2020-11-07 06:35:59,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-07 06:35:59,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-11-07 06:35:59,306 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 116 [2020-11-07 06:35:59,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:59,306 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-11-07 06:35:59,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 06:35:59,306 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-11-07 06:35:59,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-11-07 06:35:59,308 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:59,308 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:59,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 06:35:59,309 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:59,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:59,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1430809543, now seen corresponding path program 12 times [2020-11-07 06:35:59,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:59,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249956474] [2020-11-07 06:35:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:59,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:35:59,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249956474] [2020-11-07 06:35:59,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:59,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-11-07 06:35:59,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462942052] [2020-11-07 06:35:59,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 06:35:59,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:59,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 06:35:59,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-11-07 06:35:59,785 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 28 states. [2020-11-07 06:36:00,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:00,677 INFO L93 Difference]: Finished difference Result 165 states and 169 transitions. [2020-11-07 06:36:00,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-07 06:36:00,677 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 123 [2020-11-07 06:36:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:00,678 INFO L225 Difference]: With dead ends: 165 [2020-11-07 06:36:00,679 INFO L226 Difference]: Without dead ends: 138 [2020-11-07 06:36:00,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 06:36:00,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-07 06:36:00,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2020-11-07 06:36:00,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-07 06:36:00,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2020-11-07 06:36:00,703 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 123 [2020-11-07 06:36:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:00,703 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2020-11-07 06:36:00,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 06:36:00,704 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2020-11-07 06:36:00,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-07 06:36:00,705 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:00,705 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:00,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 06:36:00,706 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:00,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:00,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1693848727, now seen corresponding path program 13 times [2020-11-07 06:36:00,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:00,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556660259] [2020-11-07 06:36:00,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:01,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:36:01,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556660259] [2020-11-07 06:36:01,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:01,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-11-07 06:36:01,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148487463] [2020-11-07 06:36:01,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-07 06:36:01,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:01,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-07 06:36:01,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-11-07 06:36:01,288 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 30 states. [2020-11-07 06:36:02,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:02,352 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2020-11-07 06:36:02,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-07 06:36:02,352 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 130 [2020-11-07 06:36:02,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:02,354 INFO L225 Difference]: With dead ends: 172 [2020-11-07 06:36:02,354 INFO L226 Difference]: Without dead ends: 145 [2020-11-07 06:36:02,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 06:36:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-07 06:36:02,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2020-11-07 06:36:02,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-11-07 06:36:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2020-11-07 06:36:02,373 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 130 [2020-11-07 06:36:02,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:02,373 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2020-11-07 06:36:02,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-07 06:36:02,373 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2020-11-07 06:36:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-11-07 06:36:02,375 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:02,375 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:02,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 06:36:02,376 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:02,376 INFO L82 PathProgramCache]: Analyzing trace with hash -183508537, now seen corresponding path program 14 times [2020-11-07 06:36:02,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:02,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71940186] [2020-11-07 06:36:02,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:02,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:36:02,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71940186] [2020-11-07 06:36:02,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:02,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-11-07 06:36:02,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807880585] [2020-11-07 06:36:02,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-07 06:36:02,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:02,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-07 06:36:02,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-11-07 06:36:02,975 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 32 states. [2020-11-07 06:36:04,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:04,026 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2020-11-07 06:36:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-07 06:36:04,027 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 137 [2020-11-07 06:36:04,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:04,028 INFO L225 Difference]: With dead ends: 179 [2020-11-07 06:36:04,029 INFO L226 Difference]: Without dead ends: 152 [2020-11-07 06:36:04,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 06:36:04,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-11-07 06:36:04,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2020-11-07 06:36:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-11-07 06:36:04,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2020-11-07 06:36:04,044 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 137 [2020-11-07 06:36:04,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:04,045 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2020-11-07 06:36:04,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-07 06:36:04,045 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2020-11-07 06:36:04,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-11-07 06:36:04,047 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:04,047 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:04,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 06:36:04,047 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:04,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:04,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1845633385, now seen corresponding path program 15 times [2020-11-07 06:36:04,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:04,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187597908] [2020-11-07 06:36:04,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:04,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:36:04,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187597908] [2020-11-07 06:36:04,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:04,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-11-07 06:36:04,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180801011] [2020-11-07 06:36:04,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-07 06:36:04,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:04,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-07 06:36:04,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 06:36:04,671 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 34 states. [2020-11-07 06:36:05,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:05,967 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2020-11-07 06:36:05,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-07 06:36:05,969 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 144 [2020-11-07 06:36:05,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:05,970 INFO L225 Difference]: With dead ends: 186 [2020-11-07 06:36:05,970 INFO L226 Difference]: Without dead ends: 159 [2020-11-07 06:36:05,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 06:36:05,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-11-07 06:36:05,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 154. [2020-11-07 06:36:05,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-11-07 06:36:05,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-11-07 06:36:05,988 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 144 [2020-11-07 06:36:05,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:05,988 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-11-07 06:36:05,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-07 06:36:05,988 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-11-07 06:36:05,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-11-07 06:36:05,990 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:05,990 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:05,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 06:36:05,991 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:05,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:05,991 INFO L82 PathProgramCache]: Analyzing trace with hash 261150663, now seen corresponding path program 16 times [2020-11-07 06:36:05,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:05,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401606466] [2020-11-07 06:36:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:06,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:06,695 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:36:06,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401606466] [2020-11-07 06:36:06,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:06,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-11-07 06:36:06,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819313550] [2020-11-07 06:36:06,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 06:36:06,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:06,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 06:36:06,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 06:36:06,698 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 36 states. [2020-11-07 06:36:08,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:08,096 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2020-11-07 06:36:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-07 06:36:08,096 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 151 [2020-11-07 06:36:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:08,098 INFO L225 Difference]: With dead ends: 193 [2020-11-07 06:36:08,098 INFO L226 Difference]: Without dead ends: 166 [2020-11-07 06:36:08,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 06:36:08,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-11-07 06:36:08,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2020-11-07 06:36:08,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-11-07 06:36:08,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2020-11-07 06:36:08,116 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 151 [2020-11-07 06:36:08,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:08,119 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2020-11-07 06:36:08,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 06:36:08,119 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2020-11-07 06:36:08,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-11-07 06:36:08,121 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:08,121 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:08,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 06:36:08,122 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:08,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:08,122 INFO L82 PathProgramCache]: Analyzing trace with hash 144451735, now seen corresponding path program 17 times [2020-11-07 06:36:08,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:08,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385974411] [2020-11-07 06:36:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:08,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:36:09,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385974411] [2020-11-07 06:36:09,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:09,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-11-07 06:36:09,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590016984] [2020-11-07 06:36:09,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-07 06:36:09,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:09,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-07 06:36:09,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 06:36:09,007 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 38 states. [2020-11-07 06:36:10,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:10,552 INFO L93 Difference]: Finished difference Result 200 states and 204 transitions. [2020-11-07 06:36:10,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-07 06:36:10,552 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 158 [2020-11-07 06:36:10,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:10,554 INFO L225 Difference]: With dead ends: 200 [2020-11-07 06:36:10,555 INFO L226 Difference]: Without dead ends: 173 [2020-11-07 06:36:10,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 06:36:10,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-07 06:36:10,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2020-11-07 06:36:10,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-11-07 06:36:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2020-11-07 06:36:10,574 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 158 [2020-11-07 06:36:10,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:10,574 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2020-11-07 06:36:10,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-07 06:36:10,574 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2020-11-07 06:36:10,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 06:36:10,576 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:10,576 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:10,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 06:36:10,577 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:10,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1574220345, now seen corresponding path program 18 times [2020-11-07 06:36:10,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:10,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620567685] [2020-11-07 06:36:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:11,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:36:11,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620567685] [2020-11-07 06:36:11,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:11,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-11-07 06:36:11,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560576688] [2020-11-07 06:36:11,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-07 06:36:11,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:11,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-07 06:36:11,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:36:11,501 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 40 states. [2020-11-07 06:36:13,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:13,219 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2020-11-07 06:36:13,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-07 06:36:13,223 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 165 [2020-11-07 06:36:13,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:13,224 INFO L225 Difference]: With dead ends: 207 [2020-11-07 06:36:13,224 INFO L226 Difference]: Without dead ends: 180 [2020-11-07 06:36:13,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-11-07 06:36:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-11-07 06:36:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2020-11-07 06:36:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-11-07 06:36:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2020-11-07 06:36:13,246 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 165 [2020-11-07 06:36:13,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:13,246 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2020-11-07 06:36:13,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-07 06:36:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2020-11-07 06:36:13,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-11-07 06:36:13,248 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:13,248 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:13,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 06:36:13,249 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:13,249 INFO L82 PathProgramCache]: Analyzing trace with hash -9375081, now seen corresponding path program 19 times [2020-11-07 06:36:13,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:13,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546839993] [2020-11-07 06:36:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:14,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:36:14,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546839993] [2020-11-07 06:36:14,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:14,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-11-07 06:36:14,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808154979] [2020-11-07 06:36:14,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-07 06:36:14,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:14,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-07 06:36:14,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 06:36:14,250 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 42 states. [2020-11-07 06:36:16,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:16,121 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2020-11-07 06:36:16,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-11-07 06:36:16,122 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 172 [2020-11-07 06:36:16,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:16,125 INFO L225 Difference]: With dead ends: 214 [2020-11-07 06:36:16,126 INFO L226 Difference]: Without dead ends: 187 [2020-11-07 06:36:16,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 06:36:16,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-11-07 06:36:16,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 182. [2020-11-07 06:36:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-11-07 06:36:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2020-11-07 06:36:16,149 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 172 [2020-11-07 06:36:16,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:16,150 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2020-11-07 06:36:16,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-07 06:36:16,150 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2020-11-07 06:36:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-11-07 06:36:16,152 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:16,152 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:16,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 06:36:16,152 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:16,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1036041273, now seen corresponding path program 20 times [2020-11-07 06:36:16,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:16,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802952446] [2020-11-07 06:36:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:17,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 1350 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:36:17,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802952446] [2020-11-07 06:36:17,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:17,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-11-07 06:36:17,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606987908] [2020-11-07 06:36:17,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-07 06:36:17,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:17,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-07 06:36:17,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 06:36:17,282 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 44 states. [2020-11-07 06:36:19,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:19,047 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2020-11-07 06:36:19,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-07 06:36:19,047 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 179 [2020-11-07 06:36:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:19,049 INFO L225 Difference]: With dead ends: 221 [2020-11-07 06:36:19,049 INFO L226 Difference]: Without dead ends: 194 [2020-11-07 06:36:19,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 06:36:19,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-11-07 06:36:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 189. [2020-11-07 06:36:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-11-07 06:36:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2020-11-07 06:36:19,076 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 179 [2020-11-07 06:36:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:19,079 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2020-11-07 06:36:19,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-07 06:36:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2020-11-07 06:36:19,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-11-07 06:36:19,080 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:19,080 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:19,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 06:36:19,081 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:19,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:19,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1793311593, now seen corresponding path program 21 times [2020-11-07 06:36:19,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:19,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747673750] [2020-11-07 06:36:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:20,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 0 proven. 1491 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:36:20,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747673750] [2020-11-07 06:36:20,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:20,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-11-07 06:36:20,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945192423] [2020-11-07 06:36:20,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-07 06:36:20,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:20,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-07 06:36:20,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 06:36:20,306 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 46 states. [2020-11-07 06:36:22,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:22,215 INFO L93 Difference]: Finished difference Result 228 states and 232 transitions. [2020-11-07 06:36:22,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-07 06:36:22,216 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 186 [2020-11-07 06:36:22,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:22,218 INFO L225 Difference]: With dead ends: 228 [2020-11-07 06:36:22,219 INFO L226 Difference]: Without dead ends: 201 [2020-11-07 06:36:22,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-11-07 06:36:22,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-11-07 06:36:22,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 196. [2020-11-07 06:36:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-11-07 06:36:22,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2020-11-07 06:36:22,243 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 186 [2020-11-07 06:36:22,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:22,243 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2020-11-07 06:36:22,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-11-07 06:36:22,243 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2020-11-07 06:36:22,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-11-07 06:36:22,245 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:22,245 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:22,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 06:36:22,245 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:22,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:22,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1658013241, now seen corresponding path program 22 times [2020-11-07 06:36:22,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:22,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321278913] [2020-11-07 06:36:22,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:23,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1639 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:36:23,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321278913] [2020-11-07 06:36:23,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:23,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-11-07 06:36:23,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103171778] [2020-11-07 06:36:23,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-07 06:36:23,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:23,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-07 06:36:23,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 06:36:23,576 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 48 states. [2020-11-07 06:36:25,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:25,910 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2020-11-07 06:36:25,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-11-07 06:36:25,910 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 193 [2020-11-07 06:36:25,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:25,913 INFO L225 Difference]: With dead ends: 235 [2020-11-07 06:36:25,913 INFO L226 Difference]: Without dead ends: 208 [2020-11-07 06:36:25,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-11-07 06:36:25,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-07 06:36:25,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2020-11-07 06:36:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-11-07 06:36:25,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2020-11-07 06:36:25,939 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 193 [2020-11-07 06:36:25,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:25,940 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2020-11-07 06:36:25,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-07 06:36:25,940 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2020-11-07 06:36:25,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-11-07 06:36:25,941 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:25,941 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:25,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 06:36:25,942 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:25,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:25,942 INFO L82 PathProgramCache]: Analyzing trace with hash -801241449, now seen corresponding path program 23 times [2020-11-07 06:36:25,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:25,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347158657] [2020-11-07 06:36:25,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:27,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 1794 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:36:27,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347158657] [2020-11-07 06:36:27,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:27,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-11-07 06:36:27,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545614407] [2020-11-07 06:36:27,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-07 06:36:27,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:27,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-07 06:36:27,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 06:36:27,354 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 50 states. [2020-11-07 06:36:29,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:29,867 INFO L93 Difference]: Finished difference Result 242 states and 246 transitions. [2020-11-07 06:36:29,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-11-07 06:36:29,867 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 200 [2020-11-07 06:36:29,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:29,870 INFO L225 Difference]: With dead ends: 242 [2020-11-07 06:36:29,870 INFO L226 Difference]: Without dead ends: 215 [2020-11-07 06:36:29,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-11-07 06:36:29,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-11-07 06:36:29,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2020-11-07 06:36:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-11-07 06:36:29,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2020-11-07 06:36:29,893 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 200 [2020-11-07 06:36:29,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:29,893 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2020-11-07 06:36:29,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-07 06:36:29,893 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2020-11-07 06:36:29,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-11-07 06:36:29,894 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:29,894 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:29,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 06:36:29,895 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:29,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:29,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2018750407, now seen corresponding path program 24 times [2020-11-07 06:36:29,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:29,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011485283] [2020-11-07 06:36:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:31,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1967 backedges. 0 proven. 1956 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:36:31,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011485283] [2020-11-07 06:36:31,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:31,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-11-07 06:36:31,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733140353] [2020-11-07 06:36:31,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-11-07 06:36:31,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:31,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-11-07 06:36:31,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 06:36:31,400 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand 52 states. [2020-11-07 06:36:34,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:34,039 INFO L93 Difference]: Finished difference Result 249 states and 253 transitions. [2020-11-07 06:36:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-07 06:36:34,039 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 207 [2020-11-07 06:36:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:34,041 INFO L225 Difference]: With dead ends: 249 [2020-11-07 06:36:34,041 INFO L226 Difference]: Without dead ends: 222 [2020-11-07 06:36:34,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-11-07 06:36:34,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-11-07 06:36:34,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2020-11-07 06:36:34,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-11-07 06:36:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2020-11-07 06:36:34,072 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 207 [2020-11-07 06:36:34,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:34,072 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2020-11-07 06:36:34,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-11-07 06:36:34,072 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2020-11-07 06:36:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-11-07 06:36:34,074 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:34,074 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:34,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 06:36:34,074 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:34,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:34,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1619636073, now seen corresponding path program 25 times [2020-11-07 06:36:34,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:34,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520216323] [2020-11-07 06:36:34,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:35,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2136 backedges. 0 proven. 2125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:36:35,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520216323] [2020-11-07 06:36:35,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:35,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-11-07 06:36:35,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841003558] [2020-11-07 06:36:35,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-11-07 06:36:35,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:35,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-11-07 06:36:35,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-11-07 06:36:35,740 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 54 states. [2020-11-07 06:36:38,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:38,363 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2020-11-07 06:36:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-07 06:36:38,364 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 214 [2020-11-07 06:36:38,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:38,366 INFO L225 Difference]: With dead ends: 256 [2020-11-07 06:36:38,367 INFO L226 Difference]: Without dead ends: 229 [2020-11-07 06:36:38,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-11-07 06:36:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-11-07 06:36:38,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 224. [2020-11-07 06:36:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-11-07 06:36:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2020-11-07 06:36:38,397 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 214 [2020-11-07 06:36:38,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:38,398 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2020-11-07 06:36:38,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-11-07 06:36:38,398 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2020-11-07 06:36:38,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-11-07 06:36:38,399 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:38,399 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:38,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 06:36:38,400 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:38,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:38,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1324079673, now seen corresponding path program 26 times [2020-11-07 06:36:38,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:38,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213193503] [2020-11-07 06:36:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:40,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:36:40,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213193503] [2020-11-07 06:36:40,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:40,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-11-07 06:36:40,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741941243] [2020-11-07 06:36:40,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-11-07 06:36:40,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:40,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-11-07 06:36:40,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 06:36:40,201 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand 56 states. [2020-11-07 06:36:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:43,315 INFO L93 Difference]: Finished difference Result 263 states and 267 transitions. [2020-11-07 06:36:43,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-11-07 06:36:43,321 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 221 [2020-11-07 06:36:43,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:43,323 INFO L225 Difference]: With dead ends: 263 [2020-11-07 06:36:43,324 INFO L226 Difference]: Without dead ends: 236 [2020-11-07 06:36:43,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-11-07 06:36:43,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-11-07 06:36:43,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 231. [2020-11-07 06:36:43,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-11-07 06:36:43,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2020-11-07 06:36:43,366 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 221 [2020-11-07 06:36:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:43,367 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2020-11-07 06:36:43,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-11-07 06:36:43,367 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2020-11-07 06:36:43,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-11-07 06:36:43,368 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:43,368 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:43,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 06:36:43,369 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:43,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:43,369 INFO L82 PathProgramCache]: Analyzing trace with hash -647685481, now seen corresponding path program 27 times [2020-11-07 06:36:43,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:43,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462792200] [2020-11-07 06:36:43,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:45,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2495 backedges. 0 proven. 2484 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:36:45,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462792200] [2020-11-07 06:36:45,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:45,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-11-07 06:36:45,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355130275] [2020-11-07 06:36:45,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-11-07 06:36:45,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:45,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-11-07 06:36:45,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-11-07 06:36:45,259 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 58 states. [2020-11-07 06:36:48,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:48,627 INFO L93 Difference]: Finished difference Result 270 states and 274 transitions. [2020-11-07 06:36:48,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-11-07 06:36:48,628 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 228 [2020-11-07 06:36:48,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:48,629 INFO L225 Difference]: With dead ends: 270 [2020-11-07 06:36:48,629 INFO L226 Difference]: Without dead ends: 243 [2020-11-07 06:36:48,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3920, Invalid=8512, Unknown=0, NotChecked=0, Total=12432 [2020-11-07 06:36:48,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-11-07 06:36:48,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 238. [2020-11-07 06:36:48,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-11-07 06:36:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 240 transitions. [2020-11-07 06:36:48,666 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 240 transitions. Word has length 228 [2020-11-07 06:36:48,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:48,667 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 240 transitions. [2020-11-07 06:36:48,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-11-07 06:36:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 240 transitions. [2020-11-07 06:36:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-11-07 06:36:48,668 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:48,668 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:48,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 06:36:48,669 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:48,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1127343161, now seen corresponding path program 28 times [2020-11-07 06:36:48,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:48,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361617361] [2020-11-07 06:36:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:50,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2685 backedges. 0 proven. 2674 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:36:50,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361617361] [2020-11-07 06:36:50,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:50,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-11-07 06:36:50,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113000239] [2020-11-07 06:36:50,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-11-07 06:36:50,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:50,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-11-07 06:36:50,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 06:36:50,807 INFO L87 Difference]: Start difference. First operand 238 states and 240 transitions. Second operand 60 states. [2020-11-07 06:36:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:54,191 INFO L93 Difference]: Finished difference Result 277 states and 281 transitions. [2020-11-07 06:36:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-11-07 06:36:54,192 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 235 [2020-11-07 06:36:54,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:54,194 INFO L225 Difference]: With dead ends: 277 [2020-11-07 06:36:54,194 INFO L226 Difference]: Without dead ends: 250 [2020-11-07 06:36:54,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-11-07 06:36:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-11-07 06:36:54,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 245. [2020-11-07 06:36:54,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-11-07 06:36:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2020-11-07 06:36:54,234 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 235 [2020-11-07 06:36:54,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:54,234 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2020-11-07 06:36:54,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-11-07 06:36:54,234 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2020-11-07 06:36:54,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-11-07 06:36:54,236 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:54,236 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:54,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 06:36:54,236 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:54,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1017799831, now seen corresponding path program 29 times [2020-11-07 06:36:54,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:54,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418785343] [2020-11-07 06:36:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:56,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2871 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:36:56,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418785343] [2020-11-07 06:36:56,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:56,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-11-07 06:36:56,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541550373] [2020-11-07 06:36:56,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-11-07 06:36:56,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:56,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-11-07 06:36:56,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2020-11-07 06:36:56,479 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand 62 states. [2020-11-07 06:37:00,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:00,294 INFO L93 Difference]: Finished difference Result 284 states and 288 transitions. [2020-11-07 06:37:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-11-07 06:37:00,295 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 242 [2020-11-07 06:37:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:00,297 INFO L225 Difference]: With dead ends: 284 [2020-11-07 06:37:00,297 INFO L226 Difference]: Without dead ends: 257 [2020-11-07 06:37:00,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4500, Invalid=9780, Unknown=0, NotChecked=0, Total=14280 [2020-11-07 06:37:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-11-07 06:37:00,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 252. [2020-11-07 06:37:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-11-07 06:37:00,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 254 transitions. [2020-11-07 06:37:00,335 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 254 transitions. Word has length 242 [2020-11-07 06:37:00,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:00,336 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 254 transitions. [2020-11-07 06:37:00,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-11-07 06:37:00,336 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 254 transitions. [2020-11-07 06:37:00,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-11-07 06:37:00,337 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:00,337 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:00,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 06:37:00,337 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:00,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:00,338 INFO L82 PathProgramCache]: Analyzing trace with hash 685871559, now seen corresponding path program 30 times [2020-11-07 06:37:00,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:00,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105671252] [2020-11-07 06:37:00,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:02,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3086 backedges. 0 proven. 3075 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:37:02,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105671252] [2020-11-07 06:37:02,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:02,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-11-07 06:37:02,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836466857] [2020-11-07 06:37:02,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-11-07 06:37:02,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:02,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-11-07 06:37:02,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 06:37:02,770 INFO L87 Difference]: Start difference. First operand 252 states and 254 transitions. Second operand 64 states. [2020-11-07 06:37:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:06,904 INFO L93 Difference]: Finished difference Result 291 states and 295 transitions. [2020-11-07 06:37:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-11-07 06:37:06,905 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 249 [2020-11-07 06:37:06,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:06,907 INFO L225 Difference]: With dead ends: 291 [2020-11-07 06:37:06,907 INFO L226 Difference]: Without dead ends: 264 [2020-11-07 06:37:06,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-11-07 06:37:06,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-11-07 06:37:06,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 259. [2020-11-07 06:37:06,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-11-07 06:37:06,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2020-11-07 06:37:06,953 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 249 [2020-11-07 06:37:06,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:06,953 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2020-11-07 06:37:06,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-11-07 06:37:06,954 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2020-11-07 06:37:06,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-11-07 06:37:06,955 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:06,955 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:06,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 06:37:06,956 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:06,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:06,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1877356183, now seen corresponding path program 31 times [2020-11-07 06:37:06,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:06,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112519872] [2020-11-07 06:37:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:09,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3297 backedges. 0 proven. 3286 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:37:09,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112519872] [2020-11-07 06:37:09,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:09,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-11-07 06:37:09,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951988490] [2020-11-07 06:37:09,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-11-07 06:37:09,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:09,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-11-07 06:37:09,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2020-11-07 06:37:09,512 INFO L87 Difference]: Start difference. First operand 259 states and 261 transitions. Second operand 66 states. [2020-11-07 06:37:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:13,912 INFO L93 Difference]: Finished difference Result 298 states and 302 transitions. [2020-11-07 06:37:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-11-07 06:37:13,913 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 256 [2020-11-07 06:37:13,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:13,916 INFO L225 Difference]: With dead ends: 298 [2020-11-07 06:37:13,916 INFO L226 Difference]: Without dead ends: 271 [2020-11-07 06:37:13,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5120, Invalid=11136, Unknown=0, NotChecked=0, Total=16256 [2020-11-07 06:37:13,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-11-07 06:37:13,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 266. [2020-11-07 06:37:13,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-11-07 06:37:13,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 268 transitions. [2020-11-07 06:37:13,955 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 268 transitions. Word has length 256 [2020-11-07 06:37:13,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:13,955 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 268 transitions. [2020-11-07 06:37:13,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-11-07 06:37:13,956 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 268 transitions. [2020-11-07 06:37:13,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-11-07 06:37:13,956 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:13,957 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:13,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 06:37:13,957 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:13,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:13,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1699838009, now seen corresponding path program 32 times [2020-11-07 06:37:13,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:13,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807385240] [2020-11-07 06:37:13,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:16,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 0 proven. 3504 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:37:16,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807385240] [2020-11-07 06:37:16,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:16,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-11-07 06:37:16,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648467615] [2020-11-07 06:37:16,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-11-07 06:37:16,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:16,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-11-07 06:37:16,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 06:37:16,674 INFO L87 Difference]: Start difference. First operand 266 states and 268 transitions. Second operand 68 states. [2020-11-07 06:37:20,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:20,961 INFO L93 Difference]: Finished difference Result 305 states and 309 transitions. [2020-11-07 06:37:20,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-11-07 06:37:20,962 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 263 [2020-11-07 06:37:20,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:20,965 INFO L225 Difference]: With dead ends: 305 [2020-11-07 06:37:20,965 INFO L226 Difference]: Without dead ends: 278 [2020-11-07 06:37:20,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-11-07 06:37:20,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-11-07 06:37:21,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 273. [2020-11-07 06:37:21,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-11-07 06:37:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 275 transitions. [2020-11-07 06:37:21,016 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 275 transitions. Word has length 263 [2020-11-07 06:37:21,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:21,016 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 275 transitions. [2020-11-07 06:37:21,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-11-07 06:37:21,016 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 275 transitions. [2020-11-07 06:37:21,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-11-07 06:37:21,018 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:21,018 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:21,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 06:37:21,018 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:21,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:21,019 INFO L82 PathProgramCache]: Analyzing trace with hash 28866711, now seen corresponding path program 33 times [2020-11-07 06:37:21,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:21,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542824143] [2020-11-07 06:37:21,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:23,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3740 backedges. 0 proven. 3729 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:37:23,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542824143] [2020-11-07 06:37:23,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:23,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-11-07 06:37:23,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543329416] [2020-11-07 06:37:23,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-11-07 06:37:23,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:23,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-11-07 06:37:23,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 06:37:23,963 INFO L87 Difference]: Start difference. First operand 273 states and 275 transitions. Second operand 70 states. [2020-11-07 06:37:28,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:28,934 INFO L93 Difference]: Finished difference Result 312 states and 316 transitions. [2020-11-07 06:37:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-11-07 06:37:28,935 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 270 [2020-11-07 06:37:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:28,938 INFO L225 Difference]: With dead ends: 312 [2020-11-07 06:37:28,938 INFO L226 Difference]: Without dead ends: 285 [2020-11-07 06:37:28,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5780, Invalid=12580, Unknown=0, NotChecked=0, Total=18360 [2020-11-07 06:37:28,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-11-07 06:37:28,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 280. [2020-11-07 06:37:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-11-07 06:37:28,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 282 transitions. [2020-11-07 06:37:28,993 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 282 transitions. Word has length 270 [2020-11-07 06:37:28,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:28,994 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 282 transitions. [2020-11-07 06:37:28,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-11-07 06:37:28,994 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 282 transitions. [2020-11-07 06:37:28,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-11-07 06:37:28,996 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:28,996 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:28,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 06:37:28,996 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:28,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:28,997 INFO L82 PathProgramCache]: Analyzing trace with hash -812319289, now seen corresponding path program 34 times [2020-11-07 06:37:28,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:28,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847747366] [2020-11-07 06:37:28,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:32,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 0 proven. 3961 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:37:32,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847747366] [2020-11-07 06:37:32,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:32,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-11-07 06:37:32,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105212604] [2020-11-07 06:37:32,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-11-07 06:37:32,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:32,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-11-07 06:37:32,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 06:37:32,146 INFO L87 Difference]: Start difference. First operand 280 states and 282 transitions. Second operand 72 states. [2020-11-07 06:37:37,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:37,421 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2020-11-07 06:37:37,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-11-07 06:37:37,422 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 277 [2020-11-07 06:37:37,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:37,424 INFO L225 Difference]: With dead ends: 319 [2020-11-07 06:37:37,425 INFO L226 Difference]: Without dead ends: 292 [2020-11-07 06:37:37,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-11-07 06:37:37,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-11-07 06:37:37,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 287. [2020-11-07 06:37:37,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-07 06:37:37,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 289 transitions. [2020-11-07 06:37:37,473 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 289 transitions. Word has length 277 [2020-11-07 06:37:37,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:37,473 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 289 transitions. [2020-11-07 06:37:37,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-11-07 06:37:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 289 transitions. [2020-11-07 06:37:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-11-07 06:37:37,476 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:37,476 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:37,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 06:37:37,476 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:37,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:37,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1757495959, now seen corresponding path program 35 times [2020-11-07 06:37:37,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:37,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534099835] [2020-11-07 06:37:37,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:40,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4211 backedges. 0 proven. 4200 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:37:40,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534099835] [2020-11-07 06:37:40,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:40,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-11-07 06:37:40,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749171277] [2020-11-07 06:37:40,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-11-07 06:37:40,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:40,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-11-07 06:37:40,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2020-11-07 06:37:40,794 INFO L87 Difference]: Start difference. First operand 287 states and 289 transitions. Second operand 74 states. [2020-11-07 06:37:46,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:46,458 INFO L93 Difference]: Finished difference Result 326 states and 330 transitions. [2020-11-07 06:37:46,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-11-07 06:37:46,459 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 284 [2020-11-07 06:37:46,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:46,461 INFO L225 Difference]: With dead ends: 326 [2020-11-07 06:37:46,461 INFO L226 Difference]: Without dead ends: 299 [2020-11-07 06:37:46,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=6480, Invalid=14112, Unknown=0, NotChecked=0, Total=20592 [2020-11-07 06:37:46,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-11-07 06:37:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 294. [2020-11-07 06:37:46,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-11-07 06:37:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 296 transitions. [2020-11-07 06:37:46,510 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 296 transitions. Word has length 284 [2020-11-07 06:37:46,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:46,510 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 296 transitions. [2020-11-07 06:37:46,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-11-07 06:37:46,510 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 296 transitions. [2020-11-07 06:37:46,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-11-07 06:37:46,511 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:46,511 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:46,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 06:37:46,512 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:46,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:46,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1661668409, now seen corresponding path program 36 times [2020-11-07 06:37:46,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:46,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849373323] [2020-11-07 06:37:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:50,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:50,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4457 backedges. 0 proven. 4446 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:37:50,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849373323] [2020-11-07 06:37:50,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:50,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-11-07 06:37:50,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82783811] [2020-11-07 06:37:50,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-11-07 06:37:50,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:50,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-11-07 06:37:50,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-11-07 06:37:50,134 INFO L87 Difference]: Start difference. First operand 294 states and 296 transitions. Second operand 76 states. [2020-11-07 06:37:55,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:55,962 INFO L93 Difference]: Finished difference Result 333 states and 337 transitions. [2020-11-07 06:37:55,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-11-07 06:37:55,968 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 291 [2020-11-07 06:37:55,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:55,970 INFO L225 Difference]: With dead ends: 333 [2020-11-07 06:37:55,970 INFO L226 Difference]: Without dead ends: 306 [2020-11-07 06:37:55,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-11-07 06:37:55,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-11-07 06:37:56,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 301. [2020-11-07 06:37:56,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-11-07 06:37:56,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 303 transitions. [2020-11-07 06:37:56,045 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 303 transitions. Word has length 291 [2020-11-07 06:37:56,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:56,046 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 303 transitions. [2020-11-07 06:37:56,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-11-07 06:37:56,046 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 303 transitions. [2020-11-07 06:37:56,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-11-07 06:37:56,048 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:56,048 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:56,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 06:37:56,049 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:56,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:56,049 INFO L82 PathProgramCache]: Analyzing trace with hash 60853399, now seen corresponding path program 37 times [2020-11-07 06:37:56,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:56,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564012564] [2020-11-07 06:37:56,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:59,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4699 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:37:59,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564012564] [2020-11-07 06:37:59,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:59,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-11-07 06:37:59,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681593171] [2020-11-07 06:37:59,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-11-07 06:37:59,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:59,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-11-07 06:37:59,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2020-11-07 06:37:59,893 INFO L87 Difference]: Start difference. First operand 301 states and 303 transitions. Second operand 78 states. [2020-11-07 06:38:05,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:05,869 INFO L93 Difference]: Finished difference Result 340 states and 344 transitions. [2020-11-07 06:38:05,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-11-07 06:38:05,870 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 298 [2020-11-07 06:38:05,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:05,873 INFO L225 Difference]: With dead ends: 340 [2020-11-07 06:38:05,874 INFO L226 Difference]: Without dead ends: 313 [2020-11-07 06:38:05,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=7220, Invalid=15732, Unknown=0, NotChecked=0, Total=22952 [2020-11-07 06:38:05,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-11-07 06:38:05,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 308. [2020-11-07 06:38:05,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-11-07 06:38:05,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 310 transitions. [2020-11-07 06:38:05,946 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 310 transitions. Word has length 298 [2020-11-07 06:38:05,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:05,946 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 310 transitions. [2020-11-07 06:38:05,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-11-07 06:38:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 310 transitions. [2020-11-07 06:38:05,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-11-07 06:38:05,948 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:05,949 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:05,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 06:38:05,949 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:05,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:05,949 INFO L82 PathProgramCache]: Analyzing trace with hash -265393721, now seen corresponding path program 38 times [2020-11-07 06:38:05,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:05,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666187445] [2020-11-07 06:38:05,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:09,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4959 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:38:10,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666187445] [2020-11-07 06:38:10,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:10,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-11-07 06:38:10,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735130465] [2020-11-07 06:38:10,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-11-07 06:38:10,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:10,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-11-07 06:38:10,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 06:38:10,063 INFO L87 Difference]: Start difference. First operand 308 states and 310 transitions. Second operand 80 states. [2020-11-07 06:38:16,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:16,458 INFO L93 Difference]: Finished difference Result 347 states and 351 transitions. [2020-11-07 06:38:16,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-11-07 06:38:16,459 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 305 [2020-11-07 06:38:16,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:16,461 INFO L225 Difference]: With dead ends: 347 [2020-11-07 06:38:16,462 INFO L226 Difference]: Without dead ends: 320 [2020-11-07 06:38:16,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-11-07 06:38:16,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-11-07 06:38:16,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 315. [2020-11-07 06:38:16,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-11-07 06:38:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 317 transitions. [2020-11-07 06:38:16,512 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 317 transitions. Word has length 305 [2020-11-07 06:38:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:16,513 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 317 transitions. [2020-11-07 06:38:16,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-11-07 06:38:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 317 transitions. [2020-11-07 06:38:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-11-07 06:38:16,515 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:16,515 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:16,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 06:38:16,515 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:16,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:16,516 INFO L82 PathProgramCache]: Analyzing trace with hash 418797207, now seen corresponding path program 39 times [2020-11-07 06:38:16,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:16,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862356191] [2020-11-07 06:38:16,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:20,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5237 backedges. 0 proven. 5226 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:38:20,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862356191] [2020-11-07 06:38:20,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:20,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-11-07 06:38:20,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479807747] [2020-11-07 06:38:20,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-11-07 06:38:20,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:20,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-11-07 06:38:20,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2020-11-07 06:38:20,943 INFO L87 Difference]: Start difference. First operand 315 states and 317 transitions. Second operand 82 states. [2020-11-07 06:38:28,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:28,044 INFO L93 Difference]: Finished difference Result 354 states and 358 transitions. [2020-11-07 06:38:28,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-11-07 06:38:28,045 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 312 [2020-11-07 06:38:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:28,047 INFO L225 Difference]: With dead ends: 354 [2020-11-07 06:38:28,047 INFO L226 Difference]: Without dead ends: 327 [2020-11-07 06:38:28,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4562 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=8000, Invalid=17440, Unknown=0, NotChecked=0, Total=25440 [2020-11-07 06:38:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-11-07 06:38:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 322. [2020-11-07 06:38:28,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-11-07 06:38:28,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 324 transitions. [2020-11-07 06:38:28,127 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 324 transitions. Word has length 312 [2020-11-07 06:38:28,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:28,127 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 324 transitions. [2020-11-07 06:38:28,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-11-07 06:38:28,127 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 324 transitions. [2020-11-07 06:38:28,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-11-07 06:38:28,129 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:28,130 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:28,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 06:38:28,130 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:28,131 INFO L82 PathProgramCache]: Analyzing trace with hash -828284985, now seen corresponding path program 40 times [2020-11-07 06:38:28,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:28,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695411119] [2020-11-07 06:38:28,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:32,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5511 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:38:32,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695411119] [2020-11-07 06:38:32,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:32,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-11-07 06:38:32,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060780353] [2020-11-07 06:38:32,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-11-07 06:38:32,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:32,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-11-07 06:38:32,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 06:38:32,895 INFO L87 Difference]: Start difference. First operand 322 states and 324 transitions. Second operand 84 states. [2020-11-07 06:38:40,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:40,943 INFO L93 Difference]: Finished difference Result 361 states and 365 transitions. [2020-11-07 06:38:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-11-07 06:38:40,944 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 319 [2020-11-07 06:38:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:40,946 INFO L225 Difference]: With dead ends: 361 [2020-11-07 06:38:40,946 INFO L226 Difference]: Without dead ends: 334 [2020-11-07 06:38:40,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-11-07 06:38:40,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-11-07 06:38:41,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 329. [2020-11-07 06:38:41,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-11-07 06:38:41,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 331 transitions. [2020-11-07 06:38:41,033 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 331 transitions. Word has length 319 [2020-11-07 06:38:41,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:41,034 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 331 transitions. [2020-11-07 06:38:41,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-11-07 06:38:41,034 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 331 transitions. [2020-11-07 06:38:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-11-07 06:38:41,036 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:41,036 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:41,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 06:38:41,037 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:41,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:41,037 INFO L82 PathProgramCache]: Analyzing trace with hash -681402217, now seen corresponding path program 41 times [2020-11-07 06:38:41,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:41,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812867008] [2020-11-07 06:38:41,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:46,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5792 backedges. 0 proven. 5781 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:38:46,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812867008] [2020-11-07 06:38:46,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:46,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-11-07 06:38:46,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561951830] [2020-11-07 06:38:46,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-11-07 06:38:46,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:46,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-11-07 06:38:46,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2020-11-07 06:38:46,133 INFO L87 Difference]: Start difference. First operand 329 states and 331 transitions. Second operand 86 states. [2020-11-07 06:38:54,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:54,751 INFO L93 Difference]: Finished difference Result 368 states and 372 transitions. [2020-11-07 06:38:54,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-11-07 06:38:54,752 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 326 [2020-11-07 06:38:54,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:54,754 INFO L225 Difference]: With dead ends: 368 [2020-11-07 06:38:54,754 INFO L226 Difference]: Without dead ends: 341 [2020-11-07 06:38:54,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5042 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=8820, Invalid=19236, Unknown=0, NotChecked=0, Total=28056 [2020-11-07 06:38:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-11-07 06:38:54,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 336. [2020-11-07 06:38:54,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-11-07 06:38:54,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 338 transitions. [2020-11-07 06:38:54,839 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 338 transitions. Word has length 326 [2020-11-07 06:38:54,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:54,839 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 338 transitions. [2020-11-07 06:38:54,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-11-07 06:38:54,840 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 338 transitions. [2020-11-07 06:38:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-11-07 06:38:54,842 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:54,842 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:54,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-07 06:38:54,843 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:54,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:54,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1437455815, now seen corresponding path program 42 times [2020-11-07 06:38:54,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:54,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861296027] [2020-11-07 06:38:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:00,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6080 backedges. 0 proven. 6069 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:39:00,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861296027] [2020-11-07 06:39:00,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:00,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-11-07 06:39:00,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415801771] [2020-11-07 06:39:00,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-11-07 06:39:00,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:00,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-11-07 06:39:00,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-11-07 06:39:00,348 INFO L87 Difference]: Start difference. First operand 336 states and 338 transitions. Second operand 88 states. [2020-11-07 06:39:09,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:09,749 INFO L93 Difference]: Finished difference Result 375 states and 379 transitions. [2020-11-07 06:39:09,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-11-07 06:39:09,750 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 333 [2020-11-07 06:39:09,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:09,752 INFO L225 Difference]: With dead ends: 375 [2020-11-07 06:39:09,752 INFO L226 Difference]: Without dead ends: 348 [2020-11-07 06:39:09,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-11-07 06:39:09,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-11-07 06:39:09,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 343. [2020-11-07 06:39:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-11-07 06:39:09,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 345 transitions. [2020-11-07 06:39:09,839 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 345 transitions. Word has length 333 [2020-11-07 06:39:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:09,839 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 345 transitions. [2020-11-07 06:39:09,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-11-07 06:39:09,839 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 345 transitions. [2020-11-07 06:39:09,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-11-07 06:39:09,841 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:09,842 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:09,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-07 06:39:09,842 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:09,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1434806935, now seen corresponding path program 43 times [2020-11-07 06:39:09,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:09,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250535024] [2020-11-07 06:39:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:15,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 0 proven. 6364 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:39:15,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250535024] [2020-11-07 06:39:15,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:15,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-11-07 06:39:15,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646359499] [2020-11-07 06:39:15,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-11-07 06:39:15,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:15,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-11-07 06:39:15,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2020-11-07 06:39:15,805 INFO L87 Difference]: Start difference. First operand 343 states and 345 transitions. Second operand 90 states. [2020-11-07 06:39:26,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:26,100 INFO L93 Difference]: Finished difference Result 382 states and 386 transitions. [2020-11-07 06:39:26,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-11-07 06:39:26,102 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 340 [2020-11-07 06:39:26,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:26,104 INFO L225 Difference]: With dead ends: 382 [2020-11-07 06:39:26,104 INFO L226 Difference]: Without dead ends: 355 [2020-11-07 06:39:26,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=9680, Invalid=21120, Unknown=0, NotChecked=0, Total=30800 [2020-11-07 06:39:26,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-11-07 06:39:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 350. [2020-11-07 06:39:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-11-07 06:39:26,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 352 transitions. [2020-11-07 06:39:26,182 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 352 transitions. Word has length 340 [2020-11-07 06:39:26,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:26,183 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 352 transitions. [2020-11-07 06:39:26,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-11-07 06:39:26,183 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 352 transitions. [2020-11-07 06:39:26,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-11-07 06:39:26,185 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:26,185 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:26,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-11-07 06:39:26,185 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:26,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:26,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1162622009, now seen corresponding path program 44 times [2020-11-07 06:39:26,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:26,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66773823] [2020-11-07 06:39:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:32,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6677 backedges. 0 proven. 6666 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:39:32,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66773823] [2020-11-07 06:39:32,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:32,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-11-07 06:39:32,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408058528] [2020-11-07 06:39:32,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-11-07 06:39:32,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:32,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-11-07 06:39:32,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-11-07 06:39:32,902 INFO L87 Difference]: Start difference. First operand 350 states and 352 transitions. Second operand 92 states. [2020-11-07 06:39:43,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:43,849 INFO L93 Difference]: Finished difference Result 389 states and 393 transitions. [2020-11-07 06:39:43,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-11-07 06:39:43,851 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 347 [2020-11-07 06:39:43,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:43,854 INFO L225 Difference]: With dead ends: 389 [2020-11-07 06:39:43,854 INFO L226 Difference]: Without dead ends: 362 [2020-11-07 06:39:43,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-11-07 06:39:43,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-11-07 06:39:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 357. [2020-11-07 06:39:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-11-07 06:39:43,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 359 transitions. [2020-11-07 06:39:43,960 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 359 transitions. Word has length 347 [2020-11-07 06:39:43,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:43,961 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 359 transitions. [2020-11-07 06:39:43,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-11-07 06:39:43,961 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 359 transitions. [2020-11-07 06:39:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-11-07 06:39:43,963 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:43,963 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:43,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-07 06:39:43,964 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:43,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:43,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1845578601, now seen corresponding path program 45 times [2020-11-07 06:39:43,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:43,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74012684] [2020-11-07 06:39:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:51,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6986 backedges. 0 proven. 6975 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:39:51,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74012684] [2020-11-07 06:39:51,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:51,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2020-11-07 06:39:51,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124888371] [2020-11-07 06:39:51,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-11-07 06:39:51,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:51,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-11-07 06:39:51,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2020-11-07 06:39:51,388 INFO L87 Difference]: Start difference. First operand 357 states and 359 transitions. Second operand 94 states. [2020-11-07 06:40:02,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:02,978 INFO L93 Difference]: Finished difference Result 396 states and 400 transitions. [2020-11-07 06:40:02,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-11-07 06:40:02,980 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 354 [2020-11-07 06:40:02,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:02,982 INFO L225 Difference]: With dead ends: 396 [2020-11-07 06:40:02,982 INFO L226 Difference]: Without dead ends: 369 [2020-11-07 06:40:02,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=10580, Invalid=23092, Unknown=0, NotChecked=0, Total=33672 [2020-11-07 06:40:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-11-07 06:40:03,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 364. [2020-11-07 06:40:03,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-11-07 06:40:03,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 366 transitions. [2020-11-07 06:40:03,065 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 366 transitions. Word has length 354 [2020-11-07 06:40:03,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:03,066 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 366 transitions. [2020-11-07 06:40:03,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-11-07 06:40:03,066 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 366 transitions. [2020-11-07 06:40:03,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-11-07 06:40:03,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:03,068 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:03,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-07 06:40:03,068 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:03,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:03,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1259553223, now seen corresponding path program 46 times [2020-11-07 06:40:03,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:03,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138399854] [2020-11-07 06:40:03,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:10,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7302 backedges. 0 proven. 7291 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:40:10,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138399854] [2020-11-07 06:40:10,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:10,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2020-11-07 06:40:10,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547701439] [2020-11-07 06:40:10,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-11-07 06:40:10,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:10,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-11-07 06:40:10,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-11-07 06:40:10,810 INFO L87 Difference]: Start difference. First operand 364 states and 366 transitions. Second operand 96 states. [2020-11-07 06:40:23,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:23,345 INFO L93 Difference]: Finished difference Result 403 states and 407 transitions. [2020-11-07 06:40:23,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2020-11-07 06:40:23,346 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 361 [2020-11-07 06:40:23,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:23,349 INFO L225 Difference]: With dead ends: 403 [2020-11-07 06:40:23,349 INFO L226 Difference]: Without dead ends: 376 [2020-11-07 06:40:23,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-11-07 06:40:23,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-11-07 06:40:23,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 371. [2020-11-07 06:40:23,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-11-07 06:40:23,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 373 transitions. [2020-11-07 06:40:23,443 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 373 transitions. Word has length 361 [2020-11-07 06:40:23,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:23,443 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 373 transitions. [2020-11-07 06:40:23,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-11-07 06:40:23,444 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 373 transitions. [2020-11-07 06:40:23,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-11-07 06:40:23,446 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:23,446 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:23,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-07 06:40:23,446 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:23,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:23,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1936621207, now seen corresponding path program 47 times [2020-11-07 06:40:23,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:23,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873188949] [2020-11-07 06:40:23,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:32,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7625 backedges. 0 proven. 7614 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:40:32,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873188949] [2020-11-07 06:40:32,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:32,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2020-11-07 06:40:32,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414518162] [2020-11-07 06:40:32,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-11-07 06:40:32,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:32,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-11-07 06:40:32,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2020-11-07 06:40:32,216 INFO L87 Difference]: Start difference. First operand 371 states and 373 transitions. Second operand 98 states. [2020-11-07 06:40:46,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:46,135 INFO L93 Difference]: Finished difference Result 410 states and 414 transitions. [2020-11-07 06:40:46,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-11-07 06:40:46,137 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 368 [2020-11-07 06:40:46,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:46,140 INFO L225 Difference]: With dead ends: 410 [2020-11-07 06:40:46,141 INFO L226 Difference]: Without dead ends: 383 [2020-11-07 06:40:46,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=11520, Invalid=25152, Unknown=0, NotChecked=0, Total=36672 [2020-11-07 06:40:46,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-11-07 06:40:46,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 378. [2020-11-07 06:40:46,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-11-07 06:40:46,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 380 transitions. [2020-11-07 06:40:46,223 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 380 transitions. Word has length 368 [2020-11-07 06:40:46,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:46,223 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 380 transitions. [2020-11-07 06:40:46,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-11-07 06:40:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 380 transitions. [2020-11-07 06:40:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-11-07 06:40:46,226 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:46,226 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:46,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-07 06:40:46,227 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:46,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1814837191, now seen corresponding path program 48 times [2020-11-07 06:40:46,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:46,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548056944] [2020-11-07 06:40:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:55,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7955 backedges. 0 proven. 7944 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:40:55,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548056944] [2020-11-07 06:40:55,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:55,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2020-11-07 06:40:55,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193359985] [2020-11-07 06:40:55,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-11-07 06:40:55,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:55,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-11-07 06:40:55,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-11-07 06:40:55,846 INFO L87 Difference]: Start difference. First operand 378 states and 380 transitions. Second operand 100 states. [2020-11-07 06:41:10,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:10,991 INFO L93 Difference]: Finished difference Result 417 states and 421 transitions. [2020-11-07 06:41:10,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-11-07 06:41:10,993 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 375 [2020-11-07 06:41:10,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:10,995 INFO L225 Difference]: With dead ends: 417 [2020-11-07 06:41:10,995 INFO L226 Difference]: Without dead ends: 390 [2020-11-07 06:41:10,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-11-07 06:41:10,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-11-07 06:41:11,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 385. [2020-11-07 06:41:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-11-07 06:41:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 387 transitions. [2020-11-07 06:41:11,122 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 387 transitions. Word has length 375 [2020-11-07 06:41:11,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:11,123 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 387 transitions. [2020-11-07 06:41:11,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-11-07 06:41:11,123 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 387 transitions. [2020-11-07 06:41:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-11-07 06:41:11,125 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:11,126 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:11,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-11-07 06:41:11,126 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:11,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:11,127 INFO L82 PathProgramCache]: Analyzing trace with hash -931870569, now seen corresponding path program 49 times [2020-11-07 06:41:11,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:11,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781928591] [2020-11-07 06:41:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:21,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8292 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:41:21,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781928591] [2020-11-07 06:41:21,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:21,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2020-11-07 06:41:21,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192814973] [2020-11-07 06:41:21,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-11-07 06:41:21,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:21,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-11-07 06:41:21,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2020-11-07 06:41:21,351 INFO L87 Difference]: Start difference. First operand 385 states and 387 transitions. Second operand 102 states. [2020-11-07 06:41:38,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:38,561 INFO L93 Difference]: Finished difference Result 424 states and 428 transitions. [2020-11-07 06:41:38,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-11-07 06:41:38,569 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 382 [2020-11-07 06:41:38,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:38,571 INFO L225 Difference]: With dead ends: 424 [2020-11-07 06:41:38,571 INFO L226 Difference]: Without dead ends: 397 [2020-11-07 06:41:38,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=12500, Invalid=27300, Unknown=0, NotChecked=0, Total=39800 [2020-11-07 06:41:38,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-11-07 06:41:38,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 392. [2020-11-07 06:41:38,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-11-07 06:41:38,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 394 transitions. [2020-11-07 06:41:38,701 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 394 transitions. Word has length 382 [2020-11-07 06:41:38,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:38,701 INFO L481 AbstractCegarLoop]: Abstraction has 392 states and 394 transitions. [2020-11-07 06:41:38,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-11-07 06:41:38,701 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 394 transitions. [2020-11-07 06:41:38,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-11-07 06:41:38,704 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:38,705 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:38,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-11-07 06:41:38,705 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:38,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:38,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1688293945, now seen corresponding path program 50 times [2020-11-07 06:41:38,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:38,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65407265] [2020-11-07 06:41:38,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:49,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8636 backedges. 0 proven. 8625 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:41:49,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65407265] [2020-11-07 06:41:49,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:49,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2020-11-07 06:41:49,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349506435] [2020-11-07 06:41:49,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-11-07 06:41:49,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:49,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-11-07 06:41:49,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-11-07 06:41:49,756 INFO L87 Difference]: Start difference. First operand 392 states and 394 transitions. Second operand 104 states. [2020-11-07 06:42:07,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:07,240 INFO L93 Difference]: Finished difference Result 431 states and 435 transitions. [2020-11-07 06:42:07,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2020-11-07 06:42:07,242 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 389 [2020-11-07 06:42:07,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:07,245 INFO L225 Difference]: With dead ends: 431 [2020-11-07 06:42:07,245 INFO L226 Difference]: Without dead ends: 404 [2020-11-07 06:42:07,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-11-07 06:42:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-11-07 06:42:07,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 399. [2020-11-07 06:42:07,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-11-07 06:42:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 401 transitions. [2020-11-07 06:42:07,338 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 401 transitions. Word has length 389 [2020-11-07 06:42:07,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:07,338 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 401 transitions. [2020-11-07 06:42:07,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-11-07 06:42:07,339 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 401 transitions. [2020-11-07 06:42:07,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-11-07 06:42:07,341 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:07,341 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:07,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-11-07 06:42:07,341 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:07,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1202819735, now seen corresponding path program 51 times [2020-11-07 06:42:07,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:07,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525658634] [2020-11-07 06:42:07,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:19,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8987 backedges. 0 proven. 8976 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:42:19,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525658634] [2020-11-07 06:42:19,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:19,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2020-11-07 06:42:19,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997085486] [2020-11-07 06:42:19,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-11-07 06:42:19,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:19,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-11-07 06:42:19,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2020-11-07 06:42:19,512 INFO L87 Difference]: Start difference. First operand 399 states and 401 transitions. Second operand 106 states. [2020-11-07 06:42:39,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:39,075 INFO L93 Difference]: Finished difference Result 438 states and 442 transitions. [2020-11-07 06:42:39,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-11-07 06:42:39,077 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 396 [2020-11-07 06:42:39,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:39,080 INFO L225 Difference]: With dead ends: 438 [2020-11-07 06:42:39,080 INFO L226 Difference]: Without dead ends: 411 [2020-11-07 06:42:39,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=13520, Invalid=29536, Unknown=0, NotChecked=0, Total=43056 [2020-11-07 06:42:39,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-11-07 06:42:39,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 406. [2020-11-07 06:42:39,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-11-07 06:42:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 408 transitions. [2020-11-07 06:42:39,193 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 408 transitions. Word has length 396 [2020-11-07 06:42:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:39,193 INFO L481 AbstractCegarLoop]: Abstraction has 406 states and 408 transitions. [2020-11-07 06:42:39,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-11-07 06:42:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 408 transitions. [2020-11-07 06:42:39,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2020-11-07 06:42:39,196 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:39,196 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:39,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-11-07 06:42:39,197 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:39,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:39,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1846191047, now seen corresponding path program 52 times [2020-11-07 06:42:39,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:39,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085066326] [2020-11-07 06:42:39,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:52,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9345 backedges. 0 proven. 9334 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:42:52,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085066326] [2020-11-07 06:42:52,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:52,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2020-11-07 06:42:52,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861810667] [2020-11-07 06:42:52,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-11-07 06:42:52,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:52,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-11-07 06:42:52,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2020-11-07 06:42:52,389 INFO L87 Difference]: Start difference. First operand 406 states and 408 transitions. Second operand 108 states. [2020-11-07 06:43:14,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:43:14,127 INFO L93 Difference]: Finished difference Result 445 states and 449 transitions. [2020-11-07 06:43:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2020-11-07 06:43:14,128 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 403 [2020-11-07 06:43:14,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:43:14,131 INFO L225 Difference]: With dead ends: 445 [2020-11-07 06:43:14,131 INFO L226 Difference]: Without dead ends: 418 [2020-11-07 06:43:14,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=14045, Invalid=30687, Unknown=0, NotChecked=0, Total=44732 [2020-11-07 06:43:14,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-11-07 06:43:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 413. [2020-11-07 06:43:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-11-07 06:43:14,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 415 transitions. [2020-11-07 06:43:14,242 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 415 transitions. Word has length 403 [2020-11-07 06:43:14,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:43:14,243 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 415 transitions. [2020-11-07 06:43:14,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-11-07 06:43:14,243 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 415 transitions. [2020-11-07 06:43:14,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-11-07 06:43:14,244 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:43:14,245 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:43:14,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-11-07 06:43:14,245 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:43:14,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:43:14,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1882923881, now seen corresponding path program 53 times [2020-11-07 06:43:14,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:43:14,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572626947] [2020-11-07 06:43:14,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:43:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:28,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9710 backedges. 0 proven. 9699 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:43:28,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572626947] [2020-11-07 06:43:28,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:28,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2020-11-07 06:43:28,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373989535] [2020-11-07 06:43:28,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-11-07 06:43:28,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:28,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-11-07 06:43:28,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2020-11-07 06:43:28,752 INFO L87 Difference]: Start difference. First operand 413 states and 415 transitions. Second operand 110 states. [2020-11-07 06:43:52,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:43:52,099 INFO L93 Difference]: Finished difference Result 452 states and 456 transitions. [2020-11-07 06:43:52,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-11-07 06:43:52,101 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 410 [2020-11-07 06:43:52,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:43:52,104 INFO L225 Difference]: With dead ends: 452 [2020-11-07 06:43:52,105 INFO L226 Difference]: Without dead ends: 425 [2020-11-07 06:43:52,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8426 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=14580, Invalid=31860, Unknown=0, NotChecked=0, Total=46440 [2020-11-07 06:43:52,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-11-07 06:43:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2020-11-07 06:43:52,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-11-07 06:43:52,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 422 transitions. [2020-11-07 06:43:52,217 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 422 transitions. Word has length 410 [2020-11-07 06:43:52,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:43:52,217 INFO L481 AbstractCegarLoop]: Abstraction has 420 states and 422 transitions. [2020-11-07 06:43:52,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-11-07 06:43:52,217 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 422 transitions. [2020-11-07 06:43:52,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-11-07 06:43:52,219 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:43:52,220 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:43:52,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-11-07 06:43:52,220 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:43:52,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:43:52,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1852827193, now seen corresponding path program 54 times [2020-11-07 06:43:52,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:43:52,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514141303] [2020-11-07 06:43:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:43:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:08,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:44:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10082 backedges. 0 proven. 10071 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:44:08,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514141303] [2020-11-07 06:44:08,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:44:08,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2020-11-07 06:44:08,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742987454] [2020-11-07 06:44:08,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-11-07 06:44:08,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:44:08,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-11-07 06:44:08,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2020-11-07 06:44:08,617 INFO L87 Difference]: Start difference. First operand 420 states and 422 transitions. Second operand 112 states. [2020-11-07 06:44:35,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:44:35,660 INFO L93 Difference]: Finished difference Result 459 states and 463 transitions. [2020-11-07 06:44:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-11-07 06:44:35,664 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 417 [2020-11-07 06:44:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:44:35,667 INFO L225 Difference]: With dead ends: 459 [2020-11-07 06:44:35,667 INFO L226 Difference]: Without dead ends: 432 [2020-11-07 06:44:35,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8747 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=15125, Invalid=33055, Unknown=0, NotChecked=0, Total=48180 [2020-11-07 06:44:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-11-07 06:44:35,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 427. [2020-11-07 06:44:35,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-11-07 06:44:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 429 transitions. [2020-11-07 06:44:35,775 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 429 transitions. Word has length 417 [2020-11-07 06:44:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:44:35,776 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 429 transitions. [2020-11-07 06:44:35,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-11-07 06:44:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 429 transitions. [2020-11-07 06:44:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-11-07 06:44:35,778 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:44:35,779 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:44:35,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-11-07 06:44:35,779 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:44:35,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:44:35,780 INFO L82 PathProgramCache]: Analyzing trace with hash 659465879, now seen corresponding path program 55 times [2020-11-07 06:44:35,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:44:35,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732146361] [2020-11-07 06:44:35,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:44:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:53,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:44:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10461 backedges. 0 proven. 10450 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:44:53,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732146361] [2020-11-07 06:44:53,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:44:53,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2020-11-07 06:44:53,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492923279] [2020-11-07 06:44:53,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-11-07 06:44:53,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:44:53,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-11-07 06:44:53,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2020-11-07 06:44:53,662 INFO L87 Difference]: Start difference. First operand 427 states and 429 transitions. Second operand 114 states. [2020-11-07 06:45:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:45:22,272 INFO L93 Difference]: Finished difference Result 466 states and 470 transitions. [2020-11-07 06:45:22,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-11-07 06:45:22,276 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 424 [2020-11-07 06:45:22,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:45:22,279 INFO L225 Difference]: With dead ends: 466 [2020-11-07 06:45:22,279 INFO L226 Difference]: Without dead ends: 439 [2020-11-07 06:45:22,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9074 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=15680, Invalid=34272, Unknown=0, NotChecked=0, Total=49952 [2020-11-07 06:45:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-11-07 06:45:22,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 434. [2020-11-07 06:45:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-11-07 06:45:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 436 transitions. [2020-11-07 06:45:22,433 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 436 transitions. Word has length 424 [2020-11-07 06:45:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:45:22,434 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 436 transitions. [2020-11-07 06:45:22,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-11-07 06:45:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 436 transitions. [2020-11-07 06:45:22,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-11-07 06:45:22,436 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:45:22,436 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:45:22,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-11-07 06:45:22,437 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:45:22,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:45:22,437 INFO L82 PathProgramCache]: Analyzing trace with hash -884011065, now seen corresponding path program 56 times [2020-11-07 06:45:22,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:45:22,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274676460] [2020-11-07 06:45:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:45:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:42,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:45:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10847 backedges. 0 proven. 10836 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:45:42,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274676460] [2020-11-07 06:45:42,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:45:42,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2020-11-07 06:45:42,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032345479] [2020-11-07 06:45:42,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-11-07 06:45:42,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:45:42,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-11-07 06:45:42,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2020-11-07 06:45:42,723 INFO L87 Difference]: Start difference. First operand 434 states and 436 transitions. Second operand 116 states. [2020-11-07 06:46:17,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:46:17,775 INFO L93 Difference]: Finished difference Result 473 states and 477 transitions. [2020-11-07 06:46:17,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-11-07 06:46:17,780 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 431 [2020-11-07 06:46:17,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:46:17,783 INFO L225 Difference]: With dead ends: 473 [2020-11-07 06:46:17,783 INFO L226 Difference]: Without dead ends: 446 [2020-11-07 06:46:17,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 50.2s TimeCoverageRelationStatistics Valid=16245, Invalid=35511, Unknown=0, NotChecked=0, Total=51756 [2020-11-07 06:46:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-11-07 06:46:17,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 441. [2020-11-07 06:46:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-11-07 06:46:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 443 transitions. [2020-11-07 06:46:17,927 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 443 transitions. Word has length 431 [2020-11-07 06:46:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:46:17,927 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 443 transitions. [2020-11-07 06:46:17,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-11-07 06:46:17,927 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 443 transitions. [2020-11-07 06:46:17,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-11-07 06:46:17,930 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:46:17,930 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:46:17,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-11-07 06:46:17,930 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:46:17,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:46:17,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2096033943, now seen corresponding path program 57 times [2020-11-07 06:46:17,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:46:17,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313019100] [2020-11-07 06:46:17,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:46:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:40,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:46:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11240 backedges. 0 proven. 11229 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:46:41,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313019100] [2020-11-07 06:46:41,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:46:41,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2020-11-07 06:46:41,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283625613] [2020-11-07 06:46:41,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-11-07 06:46:41,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:46:41,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-11-07 06:46:41,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2020-11-07 06:46:41,153 INFO L87 Difference]: Start difference. First operand 441 states and 443 transitions. Second operand 118 states. [2020-11-07 06:47:17,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:47:17,259 INFO L93 Difference]: Finished difference Result 480 states and 484 transitions. [2020-11-07 06:47:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2020-11-07 06:47:17,264 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 438 [2020-11-07 06:47:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:47:17,267 INFO L225 Difference]: With dead ends: 480 [2020-11-07 06:47:17,268 INFO L226 Difference]: Without dead ends: 453 [2020-11-07 06:47:17,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9746 ImplicationChecksByTransitivity, 56.4s TimeCoverageRelationStatistics Valid=16820, Invalid=36772, Unknown=0, NotChecked=0, Total=53592 [2020-11-07 06:47:17,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-11-07 06:47:17,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 448. [2020-11-07 06:47:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-11-07 06:47:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 450 transitions. [2020-11-07 06:47:17,431 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 450 transitions. Word has length 438 [2020-11-07 06:47:17,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:47:17,432 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 450 transitions. [2020-11-07 06:47:17,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-11-07 06:47:17,432 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 450 transitions. [2020-11-07 06:47:17,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2020-11-07 06:47:17,434 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:47:17,435 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:47:17,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-11-07 06:47:17,435 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:47:17,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:47:17,436 INFO L82 PathProgramCache]: Analyzing trace with hash -123238969, now seen corresponding path program 58 times [2020-11-07 06:47:17,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:47:17,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518704226] [2020-11-07 06:47:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:47:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:47:42,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:47:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:47:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11640 backedges. 0 proven. 11629 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:47:42,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518704226] [2020-11-07 06:47:42,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:47:42,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2020-11-07 06:47:42,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738443268] [2020-11-07 06:47:42,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-11-07 06:47:42,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:47:42,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-11-07 06:47:42,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2020-11-07 06:47:42,775 INFO L87 Difference]: Start difference. First operand 448 states and 450 transitions. Second operand 120 states. [2020-11-07 06:48:26,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:48:26,248 INFO L93 Difference]: Finished difference Result 487 states and 491 transitions. [2020-11-07 06:48:26,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-11-07 06:48:26,254 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 445 [2020-11-07 06:48:26,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:48:26,256 INFO L225 Difference]: With dead ends: 487 [2020-11-07 06:48:26,257 INFO L226 Difference]: Without dead ends: 460 [2020-11-07 06:48:26,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 62.5s TimeCoverageRelationStatistics Valid=17405, Invalid=38055, Unknown=0, NotChecked=0, Total=55460 [2020-11-07 06:48:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-11-07 06:48:26,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 455. [2020-11-07 06:48:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-11-07 06:48:26,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 457 transitions. [2020-11-07 06:48:26,397 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 457 transitions. Word has length 445 [2020-11-07 06:48:26,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:48:26,398 INFO L481 AbstractCegarLoop]: Abstraction has 455 states and 457 transitions. [2020-11-07 06:48:26,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-11-07 06:48:26,398 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 457 transitions. [2020-11-07 06:48:26,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-11-07 06:48:26,401 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:48:26,401 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:48:26,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-11-07 06:48:26,402 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:48:26,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:48:26,402 INFO L82 PathProgramCache]: Analyzing trace with hash -414860649, now seen corresponding path program 59 times [2020-11-07 06:48:26,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:48:26,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880843062] [2020-11-07 06:48:26,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:48:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:48:47,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:48:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:48:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12047 backedges. 0 proven. 12036 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:48:47,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880843062] [2020-11-07 06:48:47,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:48:47,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2020-11-07 06:48:47,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453383473] [2020-11-07 06:48:47,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 122 states [2020-11-07 06:48:47,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:48:47,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2020-11-07 06:48:47,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3722, Invalid=11040, Unknown=0, NotChecked=0, Total=14762 [2020-11-07 06:48:47,818 INFO L87 Difference]: Start difference. First operand 455 states and 457 transitions. Second operand 122 states.