/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:32:58,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:32:58,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:32:58,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 18:32:58,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 18:32:58,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 18:32:58,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 18:32:58,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 18:32:58,928 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 18:32:58,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 18:32:58,929 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 18:32:58,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 18:32:58,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:32:58,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:32:58,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:32:58,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:32:58,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:32:58,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:32:58,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:32:58,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:32:58,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:32:58,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:32:58,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:32:58,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:32:58,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:32:58,957 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 18:32:58,975 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:32:58,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:32:58,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:32:58,977 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:32:58,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:32:58,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:32:58,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:32:58,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:32:58,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:32:58,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:32:58,978 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:32:58,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:32:58,980 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:32:58,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:32:58,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:32:58,980 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:32:58,980 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:32:58,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:32:58,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:32:58,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:32:58,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:32:58,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:32:58,982 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:32:59,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:32:59,346 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:32:59,349 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:32:59,351 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:32:59,351 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:32:59,352 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-22 18:32:59,430 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/961f21e4c/48fd1c9621c747f1bb159527d0bd18ef/FLAGdf7dc0ec1 [2020-08-22 18:32:59,905 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:32:59,906 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-22 18:32:59,914 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/961f21e4c/48fd1c9621c747f1bb159527d0bd18ef/FLAGdf7dc0ec1 [2020-08-22 18:33:00,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/961f21e4c/48fd1c9621c747f1bb159527d0bd18ef [2020-08-22 18:33:00,258 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:33:00,260 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:33:00,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:33:00,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:33:00,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:33:00,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:33:00" (1/1) ... [2020-08-22 18:33:00,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49c921ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00, skipping insertion in model container [2020-08-22 18:33:00,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:33:00" (1/1) ... [2020-08-22 18:33:00,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:33:00,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:33:00,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:33:00,592 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:33:00,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:33:00,651 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:33:00,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00 WrapperNode [2020-08-22 18:33:00,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:33:00,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:33:00,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:33:00,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:33:00,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (1/1) ... [2020-08-22 18:33:00,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (1/1) ... [2020-08-22 18:33:00,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (1/1) ... [2020-08-22 18:33:00,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (1/1) ... [2020-08-22 18:33:00,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (1/1) ... [2020-08-22 18:33:00,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (1/1) ... [2020-08-22 18:33:00,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (1/1) ... [2020-08-22 18:33:00,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:33:00,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:33:00,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:33:00,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:33:00,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (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 [2020-08-22 18:33:00,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:33:00,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:33:00,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 18:33:00,853 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-22 18:33:00,854 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-22 18:33:00,854 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-22 18:33:00,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:33:00,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:33:00,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 18:33:00,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 18:33:00,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 18:33:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-22 18:33:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-22 18:33:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-22 18:33:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:33:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:33:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:33:01,356 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:33:01,356 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 18:33:01,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:33:01 BoogieIcfgContainer [2020-08-22 18:33:01,363 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:33:01,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:33:01,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:33:01,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:33:01,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:33:00" (1/3) ... [2020-08-22 18:33:01,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@335cdac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:33:01, skipping insertion in model container [2020-08-22 18:33:01,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:00" (2/3) ... [2020-08-22 18:33:01,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@335cdac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:33:01, skipping insertion in model container [2020-08-22 18:33:01,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:33:01" (3/3) ... [2020-08-22 18:33:01,371 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-08-22 18:33:01,382 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:33:01,389 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:33:01,404 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:33:01,432 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:33:01,432 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:33:01,434 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:33:01,435 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:33:01,435 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:33:01,435 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:33:01,435 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:33:01,436 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:33:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-08-22 18:33:01,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 18:33:01,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:01,485 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:01,486 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:01,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:01,491 INFO L82 PathProgramCache]: Analyzing trace with hash -2062280112, now seen corresponding path program 1 times [2020-08-22 18:33:01,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:01,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014562326] [2020-08-22 18:33:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:01,558 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 18:33:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 18:33:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 18:33:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 18:33:01,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014562326] [2020-08-22 18:33:01,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:01,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 18:33:01,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327615937] [2020-08-22 18:33:01,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 18:33:01,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:01,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 18:33:01,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 18:33:01,958 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 4 states. [2020-08-22 18:33:02,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:02,181 INFO L93 Difference]: Finished difference Result 286 states and 363 transitions. [2020-08-22 18:33:02,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:33:02,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-08-22 18:33:02,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:02,198 INFO L225 Difference]: With dead ends: 286 [2020-08-22 18:33:02,199 INFO L226 Difference]: Without dead ends: 168 [2020-08-22 18:33:02,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:33:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-22 18:33:02,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 145. [2020-08-22 18:33:02,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-08-22 18:33:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 169 transitions. [2020-08-22 18:33:02,294 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 169 transitions. Word has length 100 [2020-08-22 18:33:02,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:02,295 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 169 transitions. [2020-08-22 18:33:02,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 18:33:02,295 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 169 transitions. [2020-08-22 18:33:02,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 18:33:02,301 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:02,303 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:02,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:33:02,303 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:02,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:02,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1947593625, now seen corresponding path program 1 times [2020-08-22 18:33:02,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:02,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831677513] [2020-08-22 18:33:02,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:02,307 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 18:33:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 18:33:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 18:33:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:02,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831677513] [2020-08-22 18:33:02,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:02,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 18:33:02,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122194609] [2020-08-22 18:33:02,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 18:33:02,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:02,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 18:33:02,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 18:33:02,473 INFO L87 Difference]: Start difference. First operand 145 states and 169 transitions. Second operand 4 states. [2020-08-22 18:33:02,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:02,573 INFO L93 Difference]: Finished difference Result 278 states and 331 transitions. [2020-08-22 18:33:02,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 18:33:02,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-08-22 18:33:02,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:02,577 INFO L225 Difference]: With dead ends: 278 [2020-08-22 18:33:02,577 INFO L226 Difference]: Without dead ends: 169 [2020-08-22 18:33:02,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:33:02,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-22 18:33:02,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 157. [2020-08-22 18:33:02,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-22 18:33:02,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 185 transitions. [2020-08-22 18:33:02,608 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 185 transitions. Word has length 103 [2020-08-22 18:33:02,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:02,609 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 185 transitions. [2020-08-22 18:33:02,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 18:33:02,609 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 185 transitions. [2020-08-22 18:33:02,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-22 18:33:02,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:02,613 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:02,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:33:02,614 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:02,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:02,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1622356113, now seen corresponding path program 1 times [2020-08-22 18:33:02,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:02,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118944659] [2020-08-22 18:33:02,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:02,617 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 18:33:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 18:33:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 18:33:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:02,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118944659] [2020-08-22 18:33:02,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:02,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:33:02,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416492393] [2020-08-22 18:33:02,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:33:02,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:02,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:33:02,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:33:02,800 INFO L87 Difference]: Start difference. First operand 157 states and 185 transitions. Second operand 5 states. [2020-08-22 18:33:02,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:02,926 INFO L93 Difference]: Finished difference Result 314 states and 375 transitions. [2020-08-22 18:33:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:33:02,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-08-22 18:33:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:02,934 INFO L225 Difference]: With dead ends: 314 [2020-08-22 18:33:02,934 INFO L226 Difference]: Without dead ends: 192 [2020-08-22 18:33:02,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:02,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-08-22 18:33:02,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 173. [2020-08-22 18:33:02,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-22 18:33:02,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2020-08-22 18:33:02,989 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 108 [2020-08-22 18:33:02,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:02,990 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2020-08-22 18:33:02,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:33:02,990 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2020-08-22 18:33:02,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-22 18:33:02,998 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:02,998 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:02,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 18:33:02,999 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:02,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:02,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1409900093, now seen corresponding path program 1 times [2020-08-22 18:33:03,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:03,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674357041] [2020-08-22 18:33:03,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:03,002 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 18:33:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 18:33:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 18:33:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:03,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674357041] [2020-08-22 18:33:03,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:03,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:33:03,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768059213] [2020-08-22 18:33:03,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:33:03,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:03,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:33:03,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:33:03,157 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand 5 states. [2020-08-22 18:33:03,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:03,283 INFO L93 Difference]: Finished difference Result 314 states and 375 transitions. [2020-08-22 18:33:03,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:33:03,286 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-08-22 18:33:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:03,292 INFO L225 Difference]: With dead ends: 314 [2020-08-22 18:33:03,292 INFO L226 Difference]: Without dead ends: 194 [2020-08-22 18:33:03,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:03,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-22 18:33:03,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 176. [2020-08-22 18:33:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-22 18:33:03,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 207 transitions. [2020-08-22 18:33:03,339 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 207 transitions. Word has length 108 [2020-08-22 18:33:03,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:03,340 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 207 transitions. [2020-08-22 18:33:03,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:33:03,340 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 207 transitions. [2020-08-22 18:33:03,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 18:33:03,343 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:03,344 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:03,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 18:33:03,345 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:03,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:03,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2129807001, now seen corresponding path program 2 times [2020-08-22 18:33:03,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:03,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441956375] [2020-08-22 18:33:03,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:03,353 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 18:33:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 18:33:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 18:33:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:03,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441956375] [2020-08-22 18:33:03,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:03,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 18:33:03,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616347028] [2020-08-22 18:33:03,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 18:33:03,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:03,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 18:33:03,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:03,537 INFO L87 Difference]: Start difference. First operand 176 states and 207 transitions. Second operand 6 states. [2020-08-22 18:33:03,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:03,657 INFO L93 Difference]: Finished difference Result 348 states and 416 transitions. [2020-08-22 18:33:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 18:33:03,658 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-08-22 18:33:03,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:03,663 INFO L225 Difference]: With dead ends: 348 [2020-08-22 18:33:03,663 INFO L226 Difference]: Without dead ends: 218 [2020-08-22 18:33:03,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:33:03,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-08-22 18:33:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 186. [2020-08-22 18:33:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 18:33:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2020-08-22 18:33:03,693 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 113 [2020-08-22 18:33:03,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:03,694 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2020-08-22 18:33:03,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 18:33:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2020-08-22 18:33:03,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 18:33:03,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:03,696 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:03,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 18:33:03,697 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:03,698 INFO L82 PathProgramCache]: Analyzing trace with hash -902449205, now seen corresponding path program 1 times [2020-08-22 18:33:03,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:03,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017285770] [2020-08-22 18:33:03,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:03,701 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 18:33:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 18:33:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 18:33:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:03,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017285770] [2020-08-22 18:33:03,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:03,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 18:33:03,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143109090] [2020-08-22 18:33:03,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 18:33:03,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:03,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 18:33:03,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:03,873 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand 6 states. [2020-08-22 18:33:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:03,997 INFO L93 Difference]: Finished difference Result 342 states and 410 transitions. [2020-08-22 18:33:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 18:33:03,998 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-08-22 18:33:03,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:04,010 INFO L225 Difference]: With dead ends: 342 [2020-08-22 18:33:04,010 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 18:33:04,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:33:04,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 18:33:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 186. [2020-08-22 18:33:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 18:33:04,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2020-08-22 18:33:04,045 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 113 [2020-08-22 18:33:04,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:04,046 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2020-08-22 18:33:04,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 18:33:04,046 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2020-08-22 18:33:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 18:33:04,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:04,049 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:04,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 18:33:04,049 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:04,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:04,049 INFO L82 PathProgramCache]: Analyzing trace with hash 139965841, now seen corresponding path program 3 times [2020-08-22 18:33:04,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:04,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062298716] [2020-08-22 18:33:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:04,053 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 18:33:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 18:33:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 18:33:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:04,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062298716] [2020-08-22 18:33:04,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:04,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 18:33:04,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503269420] [2020-08-22 18:33:04,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 18:33:04,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:04,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 18:33:04,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:33:04,240 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand 7 states. [2020-08-22 18:33:04,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:04,386 INFO L93 Difference]: Finished difference Result 375 states and 449 transitions. [2020-08-22 18:33:04,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 18:33:04,387 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2020-08-22 18:33:04,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:04,391 INFO L225 Difference]: With dead ends: 375 [2020-08-22 18:33:04,391 INFO L226 Difference]: Without dead ends: 240 [2020-08-22 18:33:04,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:33:04,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-08-22 18:33:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 196. [2020-08-22 18:33:04,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-08-22 18:33:04,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 233 transitions. [2020-08-22 18:33:04,417 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 233 transitions. Word has length 118 [2020-08-22 18:33:04,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:04,418 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 233 transitions. [2020-08-22 18:33:04,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 18:33:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 233 transitions. [2020-08-22 18:33:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 18:33:04,420 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:04,420 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:04,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 18:33:04,422 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:04,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:04,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1402676931, now seen corresponding path program 2 times [2020-08-22 18:33:04,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:04,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121424199] [2020-08-22 18:33:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:04,428 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 18:33:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 18:33:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 18:33:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:04,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121424199] [2020-08-22 18:33:04,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:04,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 18:33:04,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978794909] [2020-08-22 18:33:04,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 18:33:04,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:04,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 18:33:04,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:33:04,604 INFO L87 Difference]: Start difference. First operand 196 states and 233 transitions. Second operand 7 states. [2020-08-22 18:33:04,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:04,760 INFO L93 Difference]: Finished difference Result 361 states and 435 transitions. [2020-08-22 18:33:04,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 18:33:04,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2020-08-22 18:33:04,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:04,763 INFO L225 Difference]: With dead ends: 361 [2020-08-22 18:33:04,763 INFO L226 Difference]: Without dead ends: 228 [2020-08-22 18:33:04,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:33:04,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-08-22 18:33:04,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 196. [2020-08-22 18:33:04,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-08-22 18:33:04,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 233 transitions. [2020-08-22 18:33:04,786 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 233 transitions. Word has length 118 [2020-08-22 18:33:04,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:04,786 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 233 transitions. [2020-08-22 18:33:04,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 18:33:04,787 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 233 transitions. [2020-08-22 18:33:04,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-22 18:33:04,789 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:04,789 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:04,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 18:33:04,789 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:04,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:04,790 INFO L82 PathProgramCache]: Analyzing trace with hash -229056103, now seen corresponding path program 4 times [2020-08-22 18:33:04,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:04,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597992743] [2020-08-22 18:33:04,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:04,792 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 18:33:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 18:33:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 18:33:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:04,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597992743] [2020-08-22 18:33:04,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:04,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 18:33:04,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213837177] [2020-08-22 18:33:04,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 18:33:04,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:04,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 18:33:04,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:33:04,919 INFO L87 Difference]: Start difference. First operand 196 states and 233 transitions. Second operand 8 states. [2020-08-22 18:33:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:05,069 INFO L93 Difference]: Finished difference Result 402 states and 482 transitions. [2020-08-22 18:33:05,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 18:33:05,069 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2020-08-22 18:33:05,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:05,072 INFO L225 Difference]: With dead ends: 402 [2020-08-22 18:33:05,072 INFO L226 Difference]: Without dead ends: 262 [2020-08-22 18:33:05,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 18:33:05,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-22 18:33:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 206. [2020-08-22 18:33:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-22 18:33:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 246 transitions. [2020-08-22 18:33:05,098 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 246 transitions. Word has length 123 [2020-08-22 18:33:05,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:05,098 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 246 transitions. [2020-08-22 18:33:05,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 18:33:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 246 transitions. [2020-08-22 18:33:05,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-22 18:33:05,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:05,102 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:05,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 18:33:05,102 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:05,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:05,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1033654987, now seen corresponding path program 3 times [2020-08-22 18:33:05,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:05,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651819422] [2020-08-22 18:33:05,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:05,105 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 18:33:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 18:33:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 18:33:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:05,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651819422] [2020-08-22 18:33:05,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:05,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 18:33:05,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254162649] [2020-08-22 18:33:05,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 18:33:05,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:05,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 18:33:05,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:33:05,319 INFO L87 Difference]: Start difference. First operand 206 states and 246 transitions. Second operand 8 states. [2020-08-22 18:33:05,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:05,523 INFO L93 Difference]: Finished difference Result 380 states and 460 transitions. [2020-08-22 18:33:05,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 18:33:05,525 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2020-08-22 18:33:05,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:05,528 INFO L225 Difference]: With dead ends: 380 [2020-08-22 18:33:05,528 INFO L226 Difference]: Without dead ends: 242 [2020-08-22 18:33:05,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-22 18:33:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-22 18:33:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2020-08-22 18:33:05,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-22 18:33:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 246 transitions. [2020-08-22 18:33:05,559 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 246 transitions. Word has length 123 [2020-08-22 18:33:05,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:05,560 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 246 transitions. [2020-08-22 18:33:05,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 18:33:05,560 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 246 transitions. [2020-08-22 18:33:05,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 18:33:05,562 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:05,562 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:05,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 18:33:05,563 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:05,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:05,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1138358929, now seen corresponding path program 5 times [2020-08-22 18:33:05,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:05,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134280177] [2020-08-22 18:33:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:05,567 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 18:33:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 18:33:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 18:33:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,714 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:05,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134280177] [2020-08-22 18:33:05,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:05,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 18:33:05,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863741700] [2020-08-22 18:33:05,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 18:33:05,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:05,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 18:33:05,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 18:33:05,717 INFO L87 Difference]: Start difference. First operand 206 states and 246 transitions. Second operand 9 states. [2020-08-22 18:33:05,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:05,878 INFO L93 Difference]: Finished difference Result 429 states and 515 transitions. [2020-08-22 18:33:05,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 18:33:05,879 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-08-22 18:33:05,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:05,881 INFO L225 Difference]: With dead ends: 429 [2020-08-22 18:33:05,881 INFO L226 Difference]: Without dead ends: 284 [2020-08-22 18:33:05,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:05,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-08-22 18:33:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 216. [2020-08-22 18:33:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-22 18:33:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 259 transitions. [2020-08-22 18:33:05,905 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 259 transitions. Word has length 128 [2020-08-22 18:33:05,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:05,905 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 259 transitions. [2020-08-22 18:33:05,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 18:33:05,905 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 259 transitions. [2020-08-22 18:33:05,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 18:33:05,907 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:05,907 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:05,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 18:33:05,908 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:05,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1893897277, now seen corresponding path program 4 times [2020-08-22 18:33:05,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:05,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581378695] [2020-08-22 18:33:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:05,910 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:05,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 18:33:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 18:33:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 18:33:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:06,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581378695] [2020-08-22 18:33:06,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:06,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 18:33:06,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013442693] [2020-08-22 18:33:06,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 18:33:06,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:06,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 18:33:06,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 18:33:06,088 INFO L87 Difference]: Start difference. First operand 216 states and 259 transitions. Second operand 9 states. [2020-08-22 18:33:06,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:06,296 INFO L93 Difference]: Finished difference Result 399 states and 485 transitions. [2020-08-22 18:33:06,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 18:33:06,297 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-08-22 18:33:06,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:06,299 INFO L225 Difference]: With dead ends: 399 [2020-08-22 18:33:06,299 INFO L226 Difference]: Without dead ends: 256 [2020-08-22 18:33:06,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:06,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-08-22 18:33:06,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 216. [2020-08-22 18:33:06,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-22 18:33:06,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 259 transitions. [2020-08-22 18:33:06,321 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 259 transitions. Word has length 128 [2020-08-22 18:33:06,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:06,321 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 259 transitions. [2020-08-22 18:33:06,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 18:33:06,322 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 259 transitions. [2020-08-22 18:33:06,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-22 18:33:06,324 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:06,324 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:06,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 18:33:06,324 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:06,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:06,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1450818713, now seen corresponding path program 6 times [2020-08-22 18:33:06,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:06,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031441397] [2020-08-22 18:33:06,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:06,327 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 18:33:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 18:33:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 18:33:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:06,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031441397] [2020-08-22 18:33:06,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:06,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 18:33:06,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779079057] [2020-08-22 18:33:06,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 18:33:06,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:06,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 18:33:06,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:06,481 INFO L87 Difference]: Start difference. First operand 216 states and 259 transitions. Second operand 10 states. [2020-08-22 18:33:06,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:06,643 INFO L93 Difference]: Finished difference Result 456 states and 548 transitions. [2020-08-22 18:33:06,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 18:33:06,644 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-08-22 18:33:06,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:06,647 INFO L225 Difference]: With dead ends: 456 [2020-08-22 18:33:06,647 INFO L226 Difference]: Without dead ends: 306 [2020-08-22 18:33:06,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:33:06,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-22 18:33:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 226. [2020-08-22 18:33:06,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-08-22 18:33:06,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 272 transitions. [2020-08-22 18:33:06,671 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 272 transitions. Word has length 133 [2020-08-22 18:33:06,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:06,671 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 272 transitions. [2020-08-22 18:33:06,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 18:33:06,672 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 272 transitions. [2020-08-22 18:33:06,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-22 18:33:06,674 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:06,674 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:06,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 18:33:06,674 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:06,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:06,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1581437493, now seen corresponding path program 5 times [2020-08-22 18:33:06,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:06,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828837140] [2020-08-22 18:33:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:06,677 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:06,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 18:33:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 18:33:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 18:33:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:06,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828837140] [2020-08-22 18:33:06,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:06,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 18:33:06,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058602673] [2020-08-22 18:33:06,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 18:33:06,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:06,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 18:33:06,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:06,903 INFO L87 Difference]: Start difference. First operand 226 states and 272 transitions. Second operand 10 states. [2020-08-22 18:33:07,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:07,146 INFO L93 Difference]: Finished difference Result 418 states and 510 transitions. [2020-08-22 18:33:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 18:33:07,147 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-08-22 18:33:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:07,150 INFO L225 Difference]: With dead ends: 418 [2020-08-22 18:33:07,150 INFO L226 Difference]: Without dead ends: 270 [2020-08-22 18:33:07,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:33:07,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-08-22 18:33:07,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 226. [2020-08-22 18:33:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-08-22 18:33:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 272 transitions. [2020-08-22 18:33:07,187 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 272 transitions. Word has length 133 [2020-08-22 18:33:07,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:07,187 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 272 transitions. [2020-08-22 18:33:07,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 18:33:07,188 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 272 transitions. [2020-08-22 18:33:07,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-08-22 18:33:07,192 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:07,192 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:07,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 18:33:07,193 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:07,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:07,194 INFO L82 PathProgramCache]: Analyzing trace with hash 688521105, now seen corresponding path program 7 times [2020-08-22 18:33:07,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:07,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138951805] [2020-08-22 18:33:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:07,198 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 18:33:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 18:33:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 18:33:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:07,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138951805] [2020-08-22 18:33:07,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:07,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 18:33:07,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694407806] [2020-08-22 18:33:07,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 18:33:07,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:07,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 18:33:07,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:33:07,398 INFO L87 Difference]: Start difference. First operand 226 states and 272 transitions. Second operand 11 states. [2020-08-22 18:33:07,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:07,567 INFO L93 Difference]: Finished difference Result 483 states and 581 transitions. [2020-08-22 18:33:07,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 18:33:07,568 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 138 [2020-08-22 18:33:07,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:07,571 INFO L225 Difference]: With dead ends: 483 [2020-08-22 18:33:07,571 INFO L226 Difference]: Without dead ends: 328 [2020-08-22 18:33:07,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 18:33:07,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-08-22 18:33:07,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 236. [2020-08-22 18:33:07,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-22 18:33:07,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 285 transitions. [2020-08-22 18:33:07,600 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 285 transitions. Word has length 138 [2020-08-22 18:33:07,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:07,600 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 285 transitions. [2020-08-22 18:33:07,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 18:33:07,600 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 285 transitions. [2020-08-22 18:33:07,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-08-22 18:33:07,602 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:07,602 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:07,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 18:33:07,603 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:07,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:07,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1951232195, now seen corresponding path program 6 times [2020-08-22 18:33:07,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:07,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296537388] [2020-08-22 18:33:07,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:07,607 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 18:33:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 18:33:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 18:33:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:07,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296537388] [2020-08-22 18:33:07,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:07,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 18:33:07,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459876936] [2020-08-22 18:33:07,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 18:33:07,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:07,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 18:33:07,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:33:07,921 INFO L87 Difference]: Start difference. First operand 236 states and 285 transitions. Second operand 11 states. [2020-08-22 18:33:08,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:08,304 INFO L93 Difference]: Finished difference Result 437 states and 535 transitions. [2020-08-22 18:33:08,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 18:33:08,305 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 138 [2020-08-22 18:33:08,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:08,308 INFO L225 Difference]: With dead ends: 437 [2020-08-22 18:33:08,308 INFO L226 Difference]: Without dead ends: 284 [2020-08-22 18:33:08,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-22 18:33:08,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-08-22 18:33:08,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 236. [2020-08-22 18:33:08,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-22 18:33:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 285 transitions. [2020-08-22 18:33:08,348 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 285 transitions. Word has length 138 [2020-08-22 18:33:08,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:08,348 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 285 transitions. [2020-08-22 18:33:08,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 18:33:08,349 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 285 transitions. [2020-08-22 18:33:08,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-22 18:33:08,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:08,353 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:08,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 18:33:08,354 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:08,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:08,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1216030823, now seen corresponding path program 8 times [2020-08-22 18:33:08,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:08,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291958026] [2020-08-22 18:33:08,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:08,358 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:08,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:08,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:08,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:08,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 18:33:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:08,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 18:33:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:08,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-22 18:33:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:08,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291958026] [2020-08-22 18:33:08,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:08,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 18:33:08,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401886428] [2020-08-22 18:33:08,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 18:33:08,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:08,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 18:33:08,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 18:33:08,676 INFO L87 Difference]: Start difference. First operand 236 states and 285 transitions. Second operand 12 states. [2020-08-22 18:33:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:08,915 INFO L93 Difference]: Finished difference Result 510 states and 614 transitions. [2020-08-22 18:33:08,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 18:33:08,918 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 143 [2020-08-22 18:33:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:08,921 INFO L225 Difference]: With dead ends: 510 [2020-08-22 18:33:08,921 INFO L226 Difference]: Without dead ends: 350 [2020-08-22 18:33:08,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 18:33:08,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-08-22 18:33:08,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 246. [2020-08-22 18:33:08,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-08-22 18:33:08,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 298 transitions. [2020-08-22 18:33:08,972 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 298 transitions. Word has length 143 [2020-08-22 18:33:08,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:08,972 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 298 transitions. [2020-08-22 18:33:08,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 18:33:08,972 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 298 transitions. [2020-08-22 18:33:08,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-22 18:33:08,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:08,975 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:08,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 18:33:08,976 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:08,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:08,976 INFO L82 PathProgramCache]: Analyzing trace with hash 46680267, now seen corresponding path program 7 times [2020-08-22 18:33:08,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:08,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072744716] [2020-08-22 18:33:08,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:08,983 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 18:33:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 18:33:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-22 18:33:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:09,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072744716] [2020-08-22 18:33:09,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:09,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 18:33:09,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252689835] [2020-08-22 18:33:09,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 18:33:09,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:09,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 18:33:09,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 18:33:09,255 INFO L87 Difference]: Start difference. First operand 246 states and 298 transitions. Second operand 12 states. [2020-08-22 18:33:09,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:09,558 INFO L93 Difference]: Finished difference Result 456 states and 560 transitions. [2020-08-22 18:33:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 18:33:09,559 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 143 [2020-08-22 18:33:09,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:09,561 INFO L225 Difference]: With dead ends: 456 [2020-08-22 18:33:09,562 INFO L226 Difference]: Without dead ends: 298 [2020-08-22 18:33:09,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-22 18:33:09,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-08-22 18:33:09,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 246. [2020-08-22 18:33:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-08-22 18:33:09,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 298 transitions. [2020-08-22 18:33:09,593 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 298 transitions. Word has length 143 [2020-08-22 18:33:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:09,594 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 298 transitions. [2020-08-22 18:33:09,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 18:33:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 298 transitions. [2020-08-22 18:33:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-22 18:33:09,597 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:09,598 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:09,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 18:33:09,598 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:09,598 INFO L82 PathProgramCache]: Analyzing trace with hash -910703471, now seen corresponding path program 9 times [2020-08-22 18:33:09,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:09,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784620384] [2020-08-22 18:33:09,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:09,602 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 18:33:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 18:33:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 18:33:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:09,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784620384] [2020-08-22 18:33:09,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:09,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 18:33:09,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872709843] [2020-08-22 18:33:09,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 18:33:09,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:09,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 18:33:09,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 18:33:09,842 INFO L87 Difference]: Start difference. First operand 246 states and 298 transitions. Second operand 13 states. [2020-08-22 18:33:10,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:10,131 INFO L93 Difference]: Finished difference Result 537 states and 647 transitions. [2020-08-22 18:33:10,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 18:33:10,131 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 148 [2020-08-22 18:33:10,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:10,135 INFO L225 Difference]: With dead ends: 537 [2020-08-22 18:33:10,135 INFO L226 Difference]: Without dead ends: 372 [2020-08-22 18:33:10,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 18:33:10,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-08-22 18:33:10,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 256. [2020-08-22 18:33:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-22 18:33:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 311 transitions. [2020-08-22 18:33:10,180 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 311 transitions. Word has length 148 [2020-08-22 18:33:10,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:10,181 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 311 transitions. [2020-08-22 18:33:10,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 18:33:10,181 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 311 transitions. [2020-08-22 18:33:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-22 18:33:10,184 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:10,185 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:10,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 18:33:10,185 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:10,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:10,186 INFO L82 PathProgramCache]: Analyzing trace with hash 352007619, now seen corresponding path program 8 times [2020-08-22 18:33:10,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:10,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744958481] [2020-08-22 18:33:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:10,188 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 18:33:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 18:33:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 18:33:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:10,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744958481] [2020-08-22 18:33:10,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:10,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 18:33:10,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501458765] [2020-08-22 18:33:10,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 18:33:10,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:10,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 18:33:10,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-22 18:33:10,505 INFO L87 Difference]: Start difference. First operand 256 states and 311 transitions. Second operand 13 states. [2020-08-22 18:33:10,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:10,881 INFO L93 Difference]: Finished difference Result 475 states and 585 transitions. [2020-08-22 18:33:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 18:33:10,882 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 148 [2020-08-22 18:33:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:10,885 INFO L225 Difference]: With dead ends: 475 [2020-08-22 18:33:10,885 INFO L226 Difference]: Without dead ends: 312 [2020-08-22 18:33:10,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-22 18:33:10,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-08-22 18:33:10,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 256. [2020-08-22 18:33:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-22 18:33:10,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 311 transitions. [2020-08-22 18:33:10,916 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 311 transitions. Word has length 148 [2020-08-22 18:33:10,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:10,916 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 311 transitions. [2020-08-22 18:33:10,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 18:33:10,916 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 311 transitions. [2020-08-22 18:33:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-08-22 18:33:10,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:10,919 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:10,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 18:33:10,920 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:10,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:10,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1515572583, now seen corresponding path program 10 times [2020-08-22 18:33:10,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:10,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865572292] [2020-08-22 18:33:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:10,924 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:10,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 18:33:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-22 18:33:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-22 18:33:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:11,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865572292] [2020-08-22 18:33:11,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:11,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 18:33:11,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745870888] [2020-08-22 18:33:11,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 18:33:11,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:11,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 18:33:11,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 18:33:11,182 INFO L87 Difference]: Start difference. First operand 256 states and 311 transitions. Second operand 14 states. [2020-08-22 18:33:11,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:11,374 INFO L93 Difference]: Finished difference Result 564 states and 680 transitions. [2020-08-22 18:33:11,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 18:33:11,375 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2020-08-22 18:33:11,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:11,378 INFO L225 Difference]: With dead ends: 564 [2020-08-22 18:33:11,378 INFO L226 Difference]: Without dead ends: 394 [2020-08-22 18:33:11,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 18:33:11,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-08-22 18:33:11,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 266. [2020-08-22 18:33:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-08-22 18:33:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 324 transitions. [2020-08-22 18:33:11,408 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 324 transitions. Word has length 153 [2020-08-22 18:33:11,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:11,409 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 324 transitions. [2020-08-22 18:33:11,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 18:33:11,409 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 324 transitions. [2020-08-22 18:33:11,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-08-22 18:33:11,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:11,411 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:11,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 18:33:11,412 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:11,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:11,412 INFO L82 PathProgramCache]: Analyzing trace with hash -252861493, now seen corresponding path program 9 times [2020-08-22 18:33:11,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:11,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178136452] [2020-08-22 18:33:11,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:11,414 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 18:33:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-22 18:33:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-22 18:33:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:11,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178136452] [2020-08-22 18:33:11,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:11,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 18:33:11,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184773921] [2020-08-22 18:33:11,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 18:33:11,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:11,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 18:33:11,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-22 18:33:11,822 INFO L87 Difference]: Start difference. First operand 266 states and 324 transitions. Second operand 14 states. [2020-08-22 18:33:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:12,280 INFO L93 Difference]: Finished difference Result 494 states and 610 transitions. [2020-08-22 18:33:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 18:33:12,282 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2020-08-22 18:33:12,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:12,284 INFO L225 Difference]: With dead ends: 494 [2020-08-22 18:33:12,284 INFO L226 Difference]: Without dead ends: 326 [2020-08-22 18:33:12,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-22 18:33:12,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-08-22 18:33:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 266. [2020-08-22 18:33:12,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-08-22 18:33:12,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 324 transitions. [2020-08-22 18:33:12,315 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 324 transitions. Word has length 153 [2020-08-22 18:33:12,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:12,315 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 324 transitions. [2020-08-22 18:33:12,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 18:33:12,315 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 324 transitions. [2020-08-22 18:33:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-08-22 18:33:12,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:12,318 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:12,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 18:33:12,318 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:12,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:12,319 INFO L82 PathProgramCache]: Analyzing trace with hash 867387793, now seen corresponding path program 11 times [2020-08-22 18:33:12,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:12,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824099754] [2020-08-22 18:33:12,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:12,324 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:12,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:12,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:12,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:12,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-22 18:33:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:12,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 18:33:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:12,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 18:33:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:12,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824099754] [2020-08-22 18:33:12,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:12,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 18:33:12,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426899492] [2020-08-22 18:33:12,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 18:33:12,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:12,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 18:33:12,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 18:33:12,579 INFO L87 Difference]: Start difference. First operand 266 states and 324 transitions. Second operand 15 states. [2020-08-22 18:33:12,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:12,854 INFO L93 Difference]: Finished difference Result 591 states and 713 transitions. [2020-08-22 18:33:12,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 18:33:12,855 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 158 [2020-08-22 18:33:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:12,858 INFO L225 Difference]: With dead ends: 591 [2020-08-22 18:33:12,859 INFO L226 Difference]: Without dead ends: 416 [2020-08-22 18:33:12,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 18:33:12,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-08-22 18:33:12,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 276. [2020-08-22 18:33:12,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-08-22 18:33:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 337 transitions. [2020-08-22 18:33:12,893 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 337 transitions. Word has length 158 [2020-08-22 18:33:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:12,893 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 337 transitions. [2020-08-22 18:33:12,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 18:33:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 337 transitions. [2020-08-22 18:33:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-08-22 18:33:12,895 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:12,896 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:12,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 18:33:12,896 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:12,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:12,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2130098883, now seen corresponding path program 10 times [2020-08-22 18:33:12,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:12,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798759972] [2020-08-22 18:33:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:12,900 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:12,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:12,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:12,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:13,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-22 18:33:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:13,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 18:33:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:13,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 18:33:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:13,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798759972] [2020-08-22 18:33:13,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:13,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 18:33:13,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788135601] [2020-08-22 18:33:13,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 18:33:13,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:13,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 18:33:13,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-22 18:33:13,281 INFO L87 Difference]: Start difference. First operand 276 states and 337 transitions. Second operand 15 states. [2020-08-22 18:33:13,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:13,777 INFO L93 Difference]: Finished difference Result 513 states and 635 transitions. [2020-08-22 18:33:13,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 18:33:13,778 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 158 [2020-08-22 18:33:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:13,781 INFO L225 Difference]: With dead ends: 513 [2020-08-22 18:33:13,781 INFO L226 Difference]: Without dead ends: 340 [2020-08-22 18:33:13,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-08-22 18:33:13,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-08-22 18:33:13,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 276. [2020-08-22 18:33:13,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-08-22 18:33:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 337 transitions. [2020-08-22 18:33:13,819 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 337 transitions. Word has length 158 [2020-08-22 18:33:13,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:13,819 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 337 transitions. [2020-08-22 18:33:13,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 18:33:13,820 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 337 transitions. [2020-08-22 18:33:13,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-22 18:33:13,822 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:13,823 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:13,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 18:33:13,823 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:13,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:13,824 INFO L82 PathProgramCache]: Analyzing trace with hash 890883481, now seen corresponding path program 12 times [2020-08-22 18:33:13,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:13,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142197453] [2020-08-22 18:33:13,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:13,826 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:13,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:13,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:13,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-22 18:33:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-22 18:33:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-22 18:33:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:14,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142197453] [2020-08-22 18:33:14,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:14,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-22 18:33:14,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726058895] [2020-08-22 18:33:14,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 18:33:14,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:14,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 18:33:14,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 18:33:14,096 INFO L87 Difference]: Start difference. First operand 276 states and 337 transitions. Second operand 16 states. [2020-08-22 18:33:14,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:14,368 INFO L93 Difference]: Finished difference Result 618 states and 746 transitions. [2020-08-22 18:33:14,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 18:33:14,369 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 163 [2020-08-22 18:33:14,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:14,372 INFO L225 Difference]: With dead ends: 618 [2020-08-22 18:33:14,372 INFO L226 Difference]: Without dead ends: 438 [2020-08-22 18:33:14,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 18:33:14,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-08-22 18:33:14,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 286. [2020-08-22 18:33:14,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-08-22 18:33:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 350 transitions. [2020-08-22 18:33:14,406 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 350 transitions. Word has length 163 [2020-08-22 18:33:14,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:14,407 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 350 transitions. [2020-08-22 18:33:14,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 18:33:14,407 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 350 transitions. [2020-08-22 18:33:14,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-22 18:33:14,409 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:14,409 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:14,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 18:33:14,410 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:14,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:14,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2141372725, now seen corresponding path program 11 times [2020-08-22 18:33:14,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:14,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533587807] [2020-08-22 18:33:14,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:14,413 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-22 18:33:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-22 18:33:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-22 18:33:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:14,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533587807] [2020-08-22 18:33:14,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:14,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-22 18:33:14,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829730350] [2020-08-22 18:33:14,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 18:33:14,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:14,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 18:33:14,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-22 18:33:14,827 INFO L87 Difference]: Start difference. First operand 286 states and 350 transitions. Second operand 16 states. [2020-08-22 18:33:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:15,413 INFO L93 Difference]: Finished difference Result 532 states and 660 transitions. [2020-08-22 18:33:15,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 18:33:15,413 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 163 [2020-08-22 18:33:15,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:15,416 INFO L225 Difference]: With dead ends: 532 [2020-08-22 18:33:15,416 INFO L226 Difference]: Without dead ends: 354 [2020-08-22 18:33:15,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-08-22 18:33:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-22 18:33:15,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 286. [2020-08-22 18:33:15,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-08-22 18:33:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 350 transitions. [2020-08-22 18:33:15,453 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 350 transitions. Word has length 163 [2020-08-22 18:33:15,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:15,454 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 350 transitions. [2020-08-22 18:33:15,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 18:33:15,454 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 350 transitions. [2020-08-22 18:33:15,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-22 18:33:15,458 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:15,458 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:15,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 18:33:15,459 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:15,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:15,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1892454033, now seen corresponding path program 13 times [2020-08-22 18:33:15,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:15,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495728997] [2020-08-22 18:33:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:15,462 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:15,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:15,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:15,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:15,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 18:33:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:15,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-22 18:33:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:15,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-22 18:33:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:15,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495728997] [2020-08-22 18:33:15,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:15,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-08-22 18:33:15,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512842612] [2020-08-22 18:33:15,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 18:33:15,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:15,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 18:33:15,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 18:33:15,804 INFO L87 Difference]: Start difference. First operand 286 states and 350 transitions. Second operand 17 states. [2020-08-22 18:33:16,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:16,139 INFO L93 Difference]: Finished difference Result 645 states and 779 transitions. [2020-08-22 18:33:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 18:33:16,139 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 168 [2020-08-22 18:33:16,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:16,142 INFO L225 Difference]: With dead ends: 645 [2020-08-22 18:33:16,143 INFO L226 Difference]: Without dead ends: 460 [2020-08-22 18:33:16,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 18:33:16,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-08-22 18:33:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 296. [2020-08-22 18:33:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-22 18:33:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 363 transitions. [2020-08-22 18:33:16,178 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 363 transitions. Word has length 168 [2020-08-22 18:33:16,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:16,178 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 363 transitions. [2020-08-22 18:33:16,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 18:33:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 363 transitions. [2020-08-22 18:33:16,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-22 18:33:16,181 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:16,181 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:16,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 18:33:16,181 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:16,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:16,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1139802173, now seen corresponding path program 12 times [2020-08-22 18:33:16,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:16,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331925027] [2020-08-22 18:33:16,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:16,183 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:16,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:16,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:16,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:16,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 18:33:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:16,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-22 18:33:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:16,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-22 18:33:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:16,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331925027] [2020-08-22 18:33:16,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:16,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-08-22 18:33:16,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34019169] [2020-08-22 18:33:16,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 18:33:16,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:16,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 18:33:16,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-22 18:33:16,606 INFO L87 Difference]: Start difference. First operand 296 states and 363 transitions. Second operand 17 states. [2020-08-22 18:33:17,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:17,204 INFO L93 Difference]: Finished difference Result 551 states and 685 transitions. [2020-08-22 18:33:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 18:33:17,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 168 [2020-08-22 18:33:17,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:17,207 INFO L225 Difference]: With dead ends: 551 [2020-08-22 18:33:17,208 INFO L226 Difference]: Without dead ends: 368 [2020-08-22 18:33:17,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-08-22 18:33:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-08-22 18:33:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 296. [2020-08-22 18:33:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-22 18:33:17,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 363 transitions. [2020-08-22 18:33:17,243 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 363 transitions. Word has length 168 [2020-08-22 18:33:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:17,244 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 363 transitions. [2020-08-22 18:33:17,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 18:33:17,244 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 363 transitions. [2020-08-22 18:33:17,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-08-22 18:33:17,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:17,247 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:17,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 18:33:17,247 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:17,248 INFO L82 PathProgramCache]: Analyzing trace with hash -33314663, now seen corresponding path program 14 times [2020-08-22 18:33:17,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:17,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840195822] [2020-08-22 18:33:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:17,252 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:17,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:17,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:17,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:17,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-22 18:33:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:17,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-22 18:33:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:17,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-22 18:33:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:17,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840195822] [2020-08-22 18:33:17,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:17,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-08-22 18:33:17,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11835713] [2020-08-22 18:33:17,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 18:33:17,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:17,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 18:33:17,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 18:33:17,579 INFO L87 Difference]: Start difference. First operand 296 states and 363 transitions. Second operand 18 states. [2020-08-22 18:33:17,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:17,978 INFO L93 Difference]: Finished difference Result 672 states and 812 transitions. [2020-08-22 18:33:17,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 18:33:17,978 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 173 [2020-08-22 18:33:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:17,982 INFO L225 Difference]: With dead ends: 672 [2020-08-22 18:33:17,983 INFO L226 Difference]: Without dead ends: 482 [2020-08-22 18:33:17,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 18:33:17,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-08-22 18:33:18,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 306. [2020-08-22 18:33:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-08-22 18:33:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 376 transitions. [2020-08-22 18:33:18,020 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 376 transitions. Word has length 173 [2020-08-22 18:33:18,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:18,021 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 376 transitions. [2020-08-22 18:33:18,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 18:33:18,021 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 376 transitions. [2020-08-22 18:33:18,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-08-22 18:33:18,022 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:18,023 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:18,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 18:33:18,023 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:18,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:18,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1229396427, now seen corresponding path program 13 times [2020-08-22 18:33:18,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:18,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425810766] [2020-08-22 18:33:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:18,027 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-22 18:33:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-22 18:33:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-22 18:33:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:18,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425810766] [2020-08-22 18:33:18,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:18,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-08-22 18:33:18,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314518765] [2020-08-22 18:33:18,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 18:33:18,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:18,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 18:33:18,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-22 18:33:18,463 INFO L87 Difference]: Start difference. First operand 306 states and 376 transitions. Second operand 18 states. [2020-08-22 18:33:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:19,031 INFO L93 Difference]: Finished difference Result 570 states and 710 transitions. [2020-08-22 18:33:19,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 18:33:19,034 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 173 [2020-08-22 18:33:19,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:19,037 INFO L225 Difference]: With dead ends: 570 [2020-08-22 18:33:19,037 INFO L226 Difference]: Without dead ends: 382 [2020-08-22 18:33:19,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-22 18:33:19,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-08-22 18:33:19,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 306. [2020-08-22 18:33:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-08-22 18:33:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 376 transitions. [2020-08-22 18:33:19,070 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 376 transitions. Word has length 173 [2020-08-22 18:33:19,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:19,071 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 376 transitions. [2020-08-22 18:33:19,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 18:33:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 376 transitions. [2020-08-22 18:33:19,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-08-22 18:33:19,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:19,074 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:19,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 18:33:19,074 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:19,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:19,075 INFO L82 PathProgramCache]: Analyzing trace with hash -2032954479, now seen corresponding path program 15 times [2020-08-22 18:33:19,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:19,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101860125] [2020-08-22 18:33:19,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:19,077 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 18:33:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 18:33:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-08-22 18:33:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-22 18:33:19,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101860125] [2020-08-22 18:33:19,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:19,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 18:33:19,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411190804] [2020-08-22 18:33:19,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 18:33:19,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:19,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 18:33:19,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:33:19,160 INFO L87 Difference]: Start difference. First operand 306 states and 376 transitions. Second operand 3 states. [2020-08-22 18:33:19,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:19,188 INFO L93 Difference]: Finished difference Result 321 states and 393 transitions. [2020-08-22 18:33:19,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 18:33:19,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 178 [2020-08-22 18:33:19,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:19,191 INFO L225 Difference]: With dead ends: 321 [2020-08-22 18:33:19,191 INFO L226 Difference]: Without dead ends: 305 [2020-08-22 18:33:19,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:33:19,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-08-22 18:33:19,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2020-08-22 18:33:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-08-22 18:33:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 374 transitions. [2020-08-22 18:33:19,227 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 374 transitions. Word has length 178 [2020-08-22 18:33:19,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:19,228 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 374 transitions. [2020-08-22 18:33:19,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 18:33:19,228 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 374 transitions. [2020-08-22 18:33:19,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-08-22 18:33:19,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:19,230 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:19,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 18:33:19,231 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:19,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:19,231 INFO L82 PathProgramCache]: Analyzing trace with hash 368593816, now seen corresponding path program 1 times [2020-08-22 18:33:19,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:19,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538487944] [2020-08-22 18:33:19,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:19,233 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 18:33:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 18:33:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-22 18:33:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-22 18:33:19,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538487944] [2020-08-22 18:33:19,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:19,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 18:33:19,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219108360] [2020-08-22 18:33:19,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 18:33:19,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:19,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 18:33:19,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 18:33:19,312 INFO L87 Difference]: Start difference. First operand 305 states and 374 transitions. Second operand 4 states. [2020-08-22 18:33:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:19,353 INFO L93 Difference]: Finished difference Result 321 states and 392 transitions. [2020-08-22 18:33:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 18:33:19,353 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 180 [2020-08-22 18:33:19,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:19,355 INFO L225 Difference]: With dead ends: 321 [2020-08-22 18:33:19,356 INFO L226 Difference]: Without dead ends: 304 [2020-08-22 18:33:19,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:33:19,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-08-22 18:33:19,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2020-08-22 18:33:19,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-22 18:33:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 372 transitions. [2020-08-22 18:33:19,394 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 372 transitions. Word has length 180 [2020-08-22 18:33:19,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:19,394 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 372 transitions. [2020-08-22 18:33:19,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 18:33:19,395 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 372 transitions. [2020-08-22 18:33:19,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-08-22 18:33:19,396 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:19,397 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:19,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 18:33:19,397 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:19,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:19,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1683689272, now seen corresponding path program 1 times [2020-08-22 18:33:19,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:19,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867319796] [2020-08-22 18:33:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:19,409 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 18:33:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 18:33:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-22 18:33:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:19,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867319796] [2020-08-22 18:33:19,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:19,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-08-22 18:33:19,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438995770] [2020-08-22 18:33:19,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 18:33:19,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:19,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 18:33:19,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 18:33:19,794 INFO L87 Difference]: Start difference. First operand 304 states and 372 transitions. Second operand 19 states. [2020-08-22 18:33:20,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:20,155 INFO L93 Difference]: Finished difference Result 695 states and 837 transitions. [2020-08-22 18:33:20,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 18:33:20,155 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 180 [2020-08-22 18:33:20,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:20,159 INFO L225 Difference]: With dead ends: 695 [2020-08-22 18:33:20,159 INFO L226 Difference]: Without dead ends: 502 [2020-08-22 18:33:20,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 18:33:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-08-22 18:33:20,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 314. [2020-08-22 18:33:20,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-08-22 18:33:20,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 385 transitions. [2020-08-22 18:33:20,196 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 385 transitions. Word has length 180 [2020-08-22 18:33:20,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:20,196 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 385 transitions. [2020-08-22 18:33:20,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 18:33:20,197 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 385 transitions. [2020-08-22 18:33:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-08-22 18:33:20,198 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:20,199 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:20,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 18:33:20,199 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:20,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:20,199 INFO L82 PathProgramCache]: Analyzing trace with hash -326698006, now seen corresponding path program 1 times [2020-08-22 18:33:20,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:20,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205824534] [2020-08-22 18:33:20,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:20,201 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 18:33:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 18:33:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-22 18:33:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:20,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205824534] [2020-08-22 18:33:20,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:20,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-08-22 18:33:20,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804154765] [2020-08-22 18:33:20,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 18:33:20,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:20,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 18:33:20,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-22 18:33:20,675 INFO L87 Difference]: Start difference. First operand 314 states and 385 transitions. Second operand 19 states. [2020-08-22 18:33:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:21,318 INFO L93 Difference]: Finished difference Result 585 states and 727 transitions. [2020-08-22 18:33:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 18:33:21,324 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 180 [2020-08-22 18:33:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:21,327 INFO L225 Difference]: With dead ends: 585 [2020-08-22 18:33:21,327 INFO L226 Difference]: Without dead ends: 394 [2020-08-22 18:33:21,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-08-22 18:33:21,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-08-22 18:33:21,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 314. [2020-08-22 18:33:21,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-08-22 18:33:21,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 385 transitions. [2020-08-22 18:33:21,368 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 385 transitions. Word has length 180 [2020-08-22 18:33:21,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:21,370 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 385 transitions. [2020-08-22 18:33:21,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 18:33:21,371 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 385 transitions. [2020-08-22 18:33:21,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-08-22 18:33:21,373 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:21,373 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:21,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 18:33:21,373 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:21,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:21,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1714201280, now seen corresponding path program 2 times [2020-08-22 18:33:21,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:21,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512850342] [2020-08-22 18:33:21,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:21,388 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:21,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:21,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:21,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:21,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-22 18:33:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:21,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-22 18:33:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:21,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-08-22 18:33:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:21,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512850342] [2020-08-22 18:33:21,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:21,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-08-22 18:33:21,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752108599] [2020-08-22 18:33:21,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 18:33:21,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:21,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 18:33:21,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 18:33:21,811 INFO L87 Difference]: Start difference. First operand 314 states and 385 transitions. Second operand 20 states. [2020-08-22 18:33:22,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:22,185 INFO L93 Difference]: Finished difference Result 722 states and 870 transitions. [2020-08-22 18:33:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 18:33:22,189 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 185 [2020-08-22 18:33:22,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:22,193 INFO L225 Difference]: With dead ends: 722 [2020-08-22 18:33:22,193 INFO L226 Difference]: Without dead ends: 524 [2020-08-22 18:33:22,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 18:33:22,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-08-22 18:33:22,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 324. [2020-08-22 18:33:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-08-22 18:33:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 398 transitions. [2020-08-22 18:33:22,234 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 398 transitions. Word has length 185 [2020-08-22 18:33:22,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:22,234 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 398 transitions. [2020-08-22 18:33:22,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 18:33:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 398 transitions. [2020-08-22 18:33:22,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-08-22 18:33:22,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:22,237 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:22,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 18:33:22,237 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:22,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:22,238 INFO L82 PathProgramCache]: Analyzing trace with hash 570378738, now seen corresponding path program 2 times [2020-08-22 18:33:22,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:22,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830123593] [2020-08-22 18:33:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:22,240 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:22,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:22,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:22,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:22,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-22 18:33:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:22,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-22 18:33:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:22,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-08-22 18:33:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:22,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830123593] [2020-08-22 18:33:22,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:22,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-08-22 18:33:22,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699462129] [2020-08-22 18:33:22,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 18:33:22,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:22,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 18:33:22,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-22 18:33:22,780 INFO L87 Difference]: Start difference. First operand 324 states and 398 transitions. Second operand 20 states. [2020-08-22 18:33:23,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:23,564 INFO L93 Difference]: Finished difference Result 604 states and 752 transitions. [2020-08-22 18:33:23,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 18:33:23,565 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 185 [2020-08-22 18:33:23,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:23,567 INFO L225 Difference]: With dead ends: 604 [2020-08-22 18:33:23,567 INFO L226 Difference]: Without dead ends: 408 [2020-08-22 18:33:23,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-22 18:33:23,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-08-22 18:33:23,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 324. [2020-08-22 18:33:23,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-08-22 18:33:23,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 398 transitions. [2020-08-22 18:33:23,605 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 398 transitions. Word has length 185 [2020-08-22 18:33:23,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:23,605 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 398 transitions. [2020-08-22 18:33:23,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 18:33:23,606 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 398 transitions. [2020-08-22 18:33:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-08-22 18:33:23,607 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:23,608 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:23,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 18:33:23,608 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:23,608 INFO L82 PathProgramCache]: Analyzing trace with hash 922915896, now seen corresponding path program 3 times [2020-08-22 18:33:23,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:23,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914735544] [2020-08-22 18:33:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:23,610 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:23,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:23,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:23,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:23,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-08-22 18:33:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:23,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-08-22 18:33:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:23,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-22 18:33:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:24,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914735544] [2020-08-22 18:33:24,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:24,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-08-22 18:33:24,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451908844] [2020-08-22 18:33:24,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 18:33:24,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:24,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 18:33:24,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 18:33:24,022 INFO L87 Difference]: Start difference. First operand 324 states and 398 transitions. Second operand 21 states. [2020-08-22 18:33:24,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:24,456 INFO L93 Difference]: Finished difference Result 749 states and 903 transitions. [2020-08-22 18:33:24,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 18:33:24,456 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 190 [2020-08-22 18:33:24,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:24,460 INFO L225 Difference]: With dead ends: 749 [2020-08-22 18:33:24,460 INFO L226 Difference]: Without dead ends: 546 [2020-08-22 18:33:24,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 18:33:24,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-22 18:33:24,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 334. [2020-08-22 18:33:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-08-22 18:33:24,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 411 transitions. [2020-08-22 18:33:24,506 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 411 transitions. Word has length 190 [2020-08-22 18:33:24,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:24,506 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 411 transitions. [2020-08-22 18:33:24,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 18:33:24,506 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 411 transitions. [2020-08-22 18:33:24,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-08-22 18:33:24,508 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:24,508 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:24,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 18:33:24,509 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:24,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:24,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1087471382, now seen corresponding path program 3 times [2020-08-22 18:33:24,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:24,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718722538] [2020-08-22 18:33:24,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:24,511 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:24,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:24,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:24,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:24,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-08-22 18:33:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:24,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-08-22 18:33:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:24,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-22 18:33:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:25,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718722538] [2020-08-22 18:33:25,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:25,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-08-22 18:33:25,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210938765] [2020-08-22 18:33:25,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 18:33:25,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:25,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 18:33:25,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-22 18:33:25,041 INFO L87 Difference]: Start difference. First operand 334 states and 411 transitions. Second operand 21 states. [2020-08-22 18:33:25,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:25,940 INFO L93 Difference]: Finished difference Result 623 states and 777 transitions. [2020-08-22 18:33:25,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 18:33:25,944 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 190 [2020-08-22 18:33:25,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:25,947 INFO L225 Difference]: With dead ends: 623 [2020-08-22 18:33:25,947 INFO L226 Difference]: Without dead ends: 422 [2020-08-22 18:33:25,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-08-22 18:33:25,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-08-22 18:33:25,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 334. [2020-08-22 18:33:25,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-08-22 18:33:25,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 411 transitions. [2020-08-22 18:33:25,990 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 411 transitions. Word has length 190 [2020-08-22 18:33:25,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:25,991 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 411 transitions. [2020-08-22 18:33:25,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 18:33:25,991 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 411 transitions. [2020-08-22 18:33:25,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-08-22 18:33:25,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:25,993 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:25,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 18:33:25,993 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:25,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:25,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1276573760, now seen corresponding path program 4 times [2020-08-22 18:33:25,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:25,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767668917] [2020-08-22 18:33:25,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:25,995 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:26,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:26,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:26,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:26,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-22 18:33:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:26,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-22 18:33:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:26,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-22 18:33:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:26,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767668917] [2020-08-22 18:33:26,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:26,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-08-22 18:33:26,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279551027] [2020-08-22 18:33:26,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 18:33:26,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:26,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 18:33:26,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 18:33:26,437 INFO L87 Difference]: Start difference. First operand 334 states and 411 transitions. Second operand 22 states. [2020-08-22 18:33:26,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:26,772 INFO L93 Difference]: Finished difference Result 776 states and 936 transitions. [2020-08-22 18:33:26,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 18:33:26,773 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 195 [2020-08-22 18:33:26,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:26,776 INFO L225 Difference]: With dead ends: 776 [2020-08-22 18:33:26,776 INFO L226 Difference]: Without dead ends: 568 [2020-08-22 18:33:26,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 18:33:26,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-08-22 18:33:26,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 344. [2020-08-22 18:33:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-22 18:33:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 424 transitions. [2020-08-22 18:33:26,832 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 424 transitions. Word has length 195 [2020-08-22 18:33:26,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:26,833 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 424 transitions. [2020-08-22 18:33:26,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 18:33:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 424 transitions. [2020-08-22 18:33:26,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-08-22 18:33:26,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:26,837 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:26,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 18:33:26,837 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:26,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:26,837 INFO L82 PathProgramCache]: Analyzing trace with hash -733813518, now seen corresponding path program 4 times [2020-08-22 18:33:26,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:26,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645224119] [2020-08-22 18:33:26,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:26,843 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:26,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:26,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:26,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:27,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-22 18:33:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:27,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-22 18:33:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:27,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-22 18:33:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:27,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645224119] [2020-08-22 18:33:27,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:27,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-08-22 18:33:27,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704008495] [2020-08-22 18:33:27,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 18:33:27,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:27,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 18:33:27,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-22 18:33:27,487 INFO L87 Difference]: Start difference. First operand 344 states and 424 transitions. Second operand 22 states. [2020-08-22 18:33:28,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:28,409 INFO L93 Difference]: Finished difference Result 642 states and 802 transitions. [2020-08-22 18:33:28,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 18:33:28,413 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 195 [2020-08-22 18:33:28,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:28,417 INFO L225 Difference]: With dead ends: 642 [2020-08-22 18:33:28,417 INFO L226 Difference]: Without dead ends: 436 [2020-08-22 18:33:28,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-22 18:33:28,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-08-22 18:33:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 344. [2020-08-22 18:33:28,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-22 18:33:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 424 transitions. [2020-08-22 18:33:28,459 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 424 transitions. Word has length 195 [2020-08-22 18:33:28,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:28,459 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 424 transitions. [2020-08-22 18:33:28,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 18:33:28,459 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 424 transitions. [2020-08-22 18:33:28,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-08-22 18:33:28,461 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:28,461 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:28,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 18:33:28,461 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:28,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:28,462 INFO L82 PathProgramCache]: Analyzing trace with hash -171452104, now seen corresponding path program 5 times [2020-08-22 18:33:28,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:28,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956784641] [2020-08-22 18:33:28,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:28,464 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:28,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:28,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:28,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:28,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-22 18:33:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:28,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-22 18:33:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:28,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-22 18:33:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:28,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956784641] [2020-08-22 18:33:28,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:28,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-08-22 18:33:28,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592753338] [2020-08-22 18:33:28,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 18:33:28,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:28,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 18:33:28,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 18:33:28,990 INFO L87 Difference]: Start difference. First operand 344 states and 424 transitions. Second operand 23 states. [2020-08-22 18:33:29,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:29,475 INFO L93 Difference]: Finished difference Result 803 states and 969 transitions. [2020-08-22 18:33:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 18:33:29,476 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2020-08-22 18:33:29,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:29,479 INFO L225 Difference]: With dead ends: 803 [2020-08-22 18:33:29,480 INFO L226 Difference]: Without dead ends: 590 [2020-08-22 18:33:29,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 18:33:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-08-22 18:33:29,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 354. [2020-08-22 18:33:29,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-08-22 18:33:29,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 437 transitions. [2020-08-22 18:33:29,524 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 437 transitions. Word has length 200 [2020-08-22 18:33:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:29,525 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 437 transitions. [2020-08-22 18:33:29,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 18:33:29,525 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 437 transitions. [2020-08-22 18:33:29,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-08-22 18:33:29,527 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:29,527 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:29,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 18:33:29,527 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:29,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:29,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2113127914, now seen corresponding path program 5 times [2020-08-22 18:33:29,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:29,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620856181] [2020-08-22 18:33:29,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:29,530 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:29,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:29,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:29,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:30,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-22 18:33:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:30,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-22 18:33:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:30,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-22 18:33:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:30,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620856181] [2020-08-22 18:33:30,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:30,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-08-22 18:33:30,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716404914] [2020-08-22 18:33:30,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 18:33:30,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:30,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 18:33:30,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-22 18:33:30,120 INFO L87 Difference]: Start difference. First operand 354 states and 437 transitions. Second operand 23 states. [2020-08-22 18:33:31,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:31,117 INFO L93 Difference]: Finished difference Result 661 states and 827 transitions. [2020-08-22 18:33:31,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 18:33:31,118 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2020-08-22 18:33:31,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:31,121 INFO L225 Difference]: With dead ends: 661 [2020-08-22 18:33:31,121 INFO L226 Difference]: Without dead ends: 450 [2020-08-22 18:33:31,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-22 18:33:31,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-22 18:33:31,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 354. [2020-08-22 18:33:31,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-08-22 18:33:31,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 437 transitions. [2020-08-22 18:33:31,166 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 437 transitions. Word has length 200 [2020-08-22 18:33:31,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:31,166 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 437 transitions. [2020-08-22 18:33:31,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 18:33:31,166 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 437 transitions. [2020-08-22 18:33:31,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-08-22 18:33:31,168 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:31,168 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:31,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 18:33:31,169 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:31,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:31,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1093348544, now seen corresponding path program 6 times [2020-08-22 18:33:31,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:31,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166465884] [2020-08-22 18:33:31,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:31,171 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:31,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:31,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:31,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:31,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-22 18:33:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:31,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-08-22 18:33:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:31,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-22 18:33:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:31,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166465884] [2020-08-22 18:33:31,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:31,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-08-22 18:33:31,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840682327] [2020-08-22 18:33:31,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 18:33:31,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:31,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 18:33:31,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 18:33:31,720 INFO L87 Difference]: Start difference. First operand 354 states and 437 transitions. Second operand 24 states. [2020-08-22 18:33:32,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:32,195 INFO L93 Difference]: Finished difference Result 830 states and 1002 transitions. [2020-08-22 18:33:32,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 18:33:32,196 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 205 [2020-08-22 18:33:32,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:32,199 INFO L225 Difference]: With dead ends: 830 [2020-08-22 18:33:32,199 INFO L226 Difference]: Without dead ends: 612 [2020-08-22 18:33:32,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 18:33:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-08-22 18:33:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 364. [2020-08-22 18:33:32,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-08-22 18:33:32,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 450 transitions. [2020-08-22 18:33:32,245 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 450 transitions. Word has length 205 [2020-08-22 18:33:32,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:32,246 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 450 transitions. [2020-08-22 18:33:32,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 18:33:32,246 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 450 transitions. [2020-08-22 18:33:32,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-08-22 18:33:32,248 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:32,248 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:32,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 18:33:32,248 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:32,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:32,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1191231474, now seen corresponding path program 6 times [2020-08-22 18:33:32,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:32,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794662416] [2020-08-22 18:33:32,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:32,251 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:32,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:32,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:32,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:32,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-22 18:33:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:32,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-08-22 18:33:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:32,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-22 18:33:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:32,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794662416] [2020-08-22 18:33:32,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:32,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-08-22 18:33:32,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857509421] [2020-08-22 18:33:32,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 18:33:32,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:32,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 18:33:32,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-22 18:33:32,890 INFO L87 Difference]: Start difference. First operand 364 states and 450 transitions. Second operand 24 states. [2020-08-22 18:33:34,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:34,044 INFO L93 Difference]: Finished difference Result 680 states and 852 transitions. [2020-08-22 18:33:34,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 18:33:34,045 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 205 [2020-08-22 18:33:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:34,047 INFO L225 Difference]: With dead ends: 680 [2020-08-22 18:33:34,048 INFO L226 Difference]: Without dead ends: 464 [2020-08-22 18:33:34,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-22 18:33:34,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-08-22 18:33:34,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 364. [2020-08-22 18:33:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-08-22 18:33:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 450 transitions. [2020-08-22 18:33:34,096 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 450 transitions. Word has length 205 [2020-08-22 18:33:34,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:34,096 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 450 transitions. [2020-08-22 18:33:34,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 18:33:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 450 transitions. [2020-08-22 18:33:34,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-08-22 18:33:34,098 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:34,099 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:34,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 18:33:34,099 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:34,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:34,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1719328312, now seen corresponding path program 7 times [2020-08-22 18:33:34,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:34,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343244724] [2020-08-22 18:33:34,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:34,101 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:34,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:34,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:34,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:34,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-08-22 18:33:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:34,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-08-22 18:33:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:34,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-08-22 18:33:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:34,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343244724] [2020-08-22 18:33:34,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:34,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-08-22 18:33:34,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212789506] [2020-08-22 18:33:34,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 18:33:34,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:34,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 18:33:34,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 18:33:34,629 INFO L87 Difference]: Start difference. First operand 364 states and 450 transitions. Second operand 25 states. [2020-08-22 18:33:35,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:35,085 INFO L93 Difference]: Finished difference Result 857 states and 1035 transitions. [2020-08-22 18:33:35,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 18:33:35,086 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 210 [2020-08-22 18:33:35,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:35,089 INFO L225 Difference]: With dead ends: 857 [2020-08-22 18:33:35,089 INFO L226 Difference]: Without dead ends: 634 [2020-08-22 18:33:35,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 18:33:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-08-22 18:33:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 374. [2020-08-22 18:33:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-08-22 18:33:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 463 transitions. [2020-08-22 18:33:35,138 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 463 transitions. Word has length 210 [2020-08-22 18:33:35,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:35,138 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 463 transitions. [2020-08-22 18:33:35,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 18:33:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 463 transitions. [2020-08-22 18:33:35,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-08-22 18:33:35,140 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:35,140 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:35,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 18:33:35,141 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:35,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:35,141 INFO L82 PathProgramCache]: Analyzing trace with hash -291058966, now seen corresponding path program 7 times [2020-08-22 18:33:35,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:35,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484617960] [2020-08-22 18:33:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:35,143 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:35,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:35,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:35,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:35,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-08-22 18:33:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:35,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-08-22 18:33:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:35,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-08-22 18:33:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:35,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484617960] [2020-08-22 18:33:35,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:35,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-08-22 18:33:35,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134869669] [2020-08-22 18:33:35,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 18:33:35,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:35,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 18:33:35,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-22 18:33:35,946 INFO L87 Difference]: Start difference. First operand 374 states and 463 transitions. Second operand 25 states. [2020-08-22 18:33:37,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:37,074 INFO L93 Difference]: Finished difference Result 699 states and 877 transitions. [2020-08-22 18:33:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 18:33:37,074 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 210 [2020-08-22 18:33:37,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:37,077 INFO L225 Difference]: With dead ends: 699 [2020-08-22 18:33:37,077 INFO L226 Difference]: Without dead ends: 478 [2020-08-22 18:33:37,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-22 18:33:37,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-08-22 18:33:37,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 374. [2020-08-22 18:33:37,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-08-22 18:33:37,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 463 transitions. [2020-08-22 18:33:37,124 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 463 transitions. Word has length 210 [2020-08-22 18:33:37,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:37,125 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 463 transitions. [2020-08-22 18:33:37,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 18:33:37,125 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 463 transitions. [2020-08-22 18:33:37,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-08-22 18:33:37,127 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:37,127 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:37,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 18:33:37,127 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:37,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:37,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1312616000, now seen corresponding path program 8 times [2020-08-22 18:33:37,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:37,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714356562] [2020-08-22 18:33:37,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:37,129 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:37,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:37,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:37,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:37,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-22 18:33:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:37,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-22 18:33:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:37,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-22 18:33:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:37,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714356562] [2020-08-22 18:33:37,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:37,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-08-22 18:33:37,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951019281] [2020-08-22 18:33:37,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 18:33:37,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:37,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 18:33:37,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 18:33:37,747 INFO L87 Difference]: Start difference. First operand 374 states and 463 transitions. Second operand 26 states. [2020-08-22 18:33:38,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:38,241 INFO L93 Difference]: Finished difference Result 884 states and 1068 transitions. [2020-08-22 18:33:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 18:33:38,242 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 215 [2020-08-22 18:33:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:38,245 INFO L225 Difference]: With dead ends: 884 [2020-08-22 18:33:38,245 INFO L226 Difference]: Without dead ends: 656 [2020-08-22 18:33:38,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 18:33:38,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-22 18:33:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 384. [2020-08-22 18:33:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-08-22 18:33:38,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 476 transitions. [2020-08-22 18:33:38,298 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 476 transitions. Word has length 215 [2020-08-22 18:33:38,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:38,298 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 476 transitions. [2020-08-22 18:33:38,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 18:33:38,298 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 476 transitions. [2020-08-22 18:33:38,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-08-22 18:33:38,300 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:38,300 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:38,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 18:33:38,301 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:38,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:38,301 INFO L82 PathProgramCache]: Analyzing trace with hash -697771278, now seen corresponding path program 8 times [2020-08-22 18:33:38,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:38,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624915334] [2020-08-22 18:33:38,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:38,303 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:38,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:38,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:38,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:38,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-22 18:33:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:38,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-22 18:33:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:38,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-22 18:33:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:39,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624915334] [2020-08-22 18:33:39,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:39,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-08-22 18:33:39,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147082063] [2020-08-22 18:33:39,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 18:33:39,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:39,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 18:33:39,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-22 18:33:39,042 INFO L87 Difference]: Start difference. First operand 384 states and 476 transitions. Second operand 26 states. [2020-08-22 18:33:40,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:40,432 INFO L93 Difference]: Finished difference Result 718 states and 902 transitions. [2020-08-22 18:33:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 18:33:40,432 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 215 [2020-08-22 18:33:40,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:40,434 INFO L225 Difference]: With dead ends: 718 [2020-08-22 18:33:40,434 INFO L226 Difference]: Without dead ends: 492 [2020-08-22 18:33:40,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-22 18:33:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-08-22 18:33:40,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 384. [2020-08-22 18:33:40,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-08-22 18:33:40,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 476 transitions. [2020-08-22 18:33:40,486 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 476 transitions. Word has length 215 [2020-08-22 18:33:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:40,487 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 476 transitions. [2020-08-22 18:33:40,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 18:33:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 476 transitions. [2020-08-22 18:33:40,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-22 18:33:40,488 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:40,489 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:40,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 18:33:40,489 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:40,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:40,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1256956728, now seen corresponding path program 9 times [2020-08-22 18:33:40,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:40,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984816360] [2020-08-22 18:33:40,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:40,491 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:40,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-08-22 18:33:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-08-22 18:33:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-08-22 18:33:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:41,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984816360] [2020-08-22 18:33:41,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:41,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-08-22 18:33:41,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338816509] [2020-08-22 18:33:41,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 18:33:41,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:41,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 18:33:41,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 18:33:41,170 INFO L87 Difference]: Start difference. First operand 384 states and 476 transitions. Second operand 27 states. [2020-08-22 18:33:41,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:41,794 INFO L93 Difference]: Finished difference Result 911 states and 1101 transitions. [2020-08-22 18:33:41,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 18:33:41,795 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 220 [2020-08-22 18:33:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:41,798 INFO L225 Difference]: With dead ends: 911 [2020-08-22 18:33:41,798 INFO L226 Difference]: Without dead ends: 678 [2020-08-22 18:33:41,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-22 18:33:41,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2020-08-22 18:33:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 394. [2020-08-22 18:33:41,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-08-22 18:33:41,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 489 transitions. [2020-08-22 18:33:41,853 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 489 transitions. Word has length 220 [2020-08-22 18:33:41,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:41,853 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 489 transitions. [2020-08-22 18:33:41,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 18:33:41,853 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 489 transitions. [2020-08-22 18:33:41,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-22 18:33:41,855 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:41,855 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:41,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 18:33:41,855 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:41,856 INFO L82 PathProgramCache]: Analyzing trace with hash -753430550, now seen corresponding path program 9 times [2020-08-22 18:33:41,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:41,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902593465] [2020-08-22 18:33:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:41,858 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:41,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-08-22 18:33:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-08-22 18:33:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-08-22 18:33:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:42,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902593465] [2020-08-22 18:33:42,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:42,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-08-22 18:33:42,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759477277] [2020-08-22 18:33:42,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 18:33:42,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:42,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 18:33:42,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-22 18:33:42,707 INFO L87 Difference]: Start difference. First operand 394 states and 489 transitions. Second operand 27 states. [2020-08-22 18:33:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:44,224 INFO L93 Difference]: Finished difference Result 737 states and 927 transitions. [2020-08-22 18:33:44,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 18:33:44,229 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 220 [2020-08-22 18:33:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:44,232 INFO L225 Difference]: With dead ends: 737 [2020-08-22 18:33:44,232 INFO L226 Difference]: Without dead ends: 506 [2020-08-22 18:33:44,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-22 18:33:44,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-22 18:33:44,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 394. [2020-08-22 18:33:44,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-08-22 18:33:44,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 489 transitions. [2020-08-22 18:33:44,287 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 489 transitions. Word has length 220 [2020-08-22 18:33:44,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:44,287 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 489 transitions. [2020-08-22 18:33:44,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 18:33:44,287 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 489 transitions. [2020-08-22 18:33:44,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-08-22 18:33:44,289 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:44,289 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:44,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 18:33:44,289 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:44,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:44,290 INFO L82 PathProgramCache]: Analyzing trace with hash -629192384, now seen corresponding path program 10 times [2020-08-22 18:33:44,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:44,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562132592] [2020-08-22 18:33:44,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:44,292 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 18:33:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 18:33:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:44,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562132592] [2020-08-22 18:33:44,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:44,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-08-22 18:33:44,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84525712] [2020-08-22 18:33:44,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 18:33:44,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:44,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 18:33:44,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-22 18:33:44,941 INFO L87 Difference]: Start difference. First operand 394 states and 489 transitions. Second operand 28 states. [2020-08-22 18:33:45,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:45,612 INFO L93 Difference]: Finished difference Result 938 states and 1134 transitions. [2020-08-22 18:33:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 18:33:45,613 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 225 [2020-08-22 18:33:45,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:45,618 INFO L225 Difference]: With dead ends: 938 [2020-08-22 18:33:45,618 INFO L226 Difference]: Without dead ends: 700 [2020-08-22 18:33:45,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=407, Unknown=0, NotChecked=0, Total=812 [2020-08-22 18:33:45,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2020-08-22 18:33:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 404. [2020-08-22 18:33:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-08-22 18:33:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 502 transitions. [2020-08-22 18:33:45,671 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 502 transitions. Word has length 225 [2020-08-22 18:33:45,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:45,672 INFO L479 AbstractCegarLoop]: Abstraction has 404 states and 502 transitions. [2020-08-22 18:33:45,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 18:33:45,672 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 502 transitions. [2020-08-22 18:33:45,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-08-22 18:33:45,673 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:45,674 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:45,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 18:33:45,674 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:45,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1655387634, now seen corresponding path program 10 times [2020-08-22 18:33:45,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:45,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508042103] [2020-08-22 18:33:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:45,676 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 18:33:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 18:33:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:46,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508042103] [2020-08-22 18:33:46,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:46,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 18:33:46,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145159695] [2020-08-22 18:33:46,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 18:33:46,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:46,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 18:33:46,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:46,001 INFO L87 Difference]: Start difference. First operand 404 states and 502 transitions. Second operand 10 states. [2020-08-22 18:33:46,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:46,313 INFO L93 Difference]: Finished difference Result 459 states and 581 transitions. [2020-08-22 18:33:46,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 18:33:46,314 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 225 [2020-08-22 18:33:46,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:46,320 INFO L225 Difference]: With dead ends: 459 [2020-08-22 18:33:46,321 INFO L226 Difference]: Without dead ends: 453 [2020-08-22 18:33:46,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-08-22 18:33:46,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-08-22 18:33:46,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 430. [2020-08-22 18:33:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-08-22 18:33:46,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 540 transitions. [2020-08-22 18:33:46,411 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 540 transitions. Word has length 225 [2020-08-22 18:33:46,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:46,413 INFO L479 AbstractCegarLoop]: Abstraction has 430 states and 540 transitions. [2020-08-22 18:33:46,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 18:33:46,414 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 540 transitions. [2020-08-22 18:33:46,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-08-22 18:33:46,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:46,417 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:46,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 18:33:46,418 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:46,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:46,418 INFO L82 PathProgramCache]: Analyzing trace with hash -131719239, now seen corresponding path program 1 times [2020-08-22 18:33:46,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:46,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443503554] [2020-08-22 18:33:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:46,420 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 18:33:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 18:33:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 18:33:46,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443503554] [2020-08-22 18:33:46,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:46,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 18:33:46,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964786209] [2020-08-22 18:33:46,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 18:33:46,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:46,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 18:33:46,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-22 18:33:46,738 INFO L87 Difference]: Start difference. First operand 430 states and 540 transitions. Second operand 12 states. [2020-08-22 18:33:47,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:47,067 INFO L93 Difference]: Finished difference Result 459 states and 579 transitions. [2020-08-22 18:33:47,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 18:33:47,068 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 227 [2020-08-22 18:33:47,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:47,071 INFO L225 Difference]: With dead ends: 459 [2020-08-22 18:33:47,071 INFO L226 Difference]: Without dead ends: 452 [2020-08-22 18:33:47,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-08-22 18:33:47,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-08-22 18:33:47,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 438. [2020-08-22 18:33:47,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-08-22 18:33:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 549 transitions. [2020-08-22 18:33:47,163 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 549 transitions. Word has length 227 [2020-08-22 18:33:47,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:47,164 INFO L479 AbstractCegarLoop]: Abstraction has 438 states and 549 transitions. [2020-08-22 18:33:47,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 18:33:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 549 transitions. [2020-08-22 18:33:47,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-08-22 18:33:47,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:47,167 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:47,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 18:33:47,168 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:47,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:47,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1678288039, now seen corresponding path program 1 times [2020-08-22 18:33:47,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:47,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822802134] [2020-08-22 18:33:47,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:47,170 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 18:33:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 18:33:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-22 18:33:47,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822802134] [2020-08-22 18:33:47,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:47,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 18:33:47,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739141511] [2020-08-22 18:33:47,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 18:33:47,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:47,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 18:33:47,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:47,351 INFO L87 Difference]: Start difference. First operand 438 states and 549 transitions. Second operand 6 states. [2020-08-22 18:33:47,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:47,466 INFO L93 Difference]: Finished difference Result 444 states and 554 transitions. [2020-08-22 18:33:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:33:47,467 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 227 [2020-08-22 18:33:47,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:47,470 INFO L225 Difference]: With dead ends: 444 [2020-08-22 18:33:47,470 INFO L226 Difference]: Without dead ends: 432 [2020-08-22 18:33:47,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:33:47,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-08-22 18:33:47,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2020-08-22 18:33:47,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2020-08-22 18:33:47,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 541 transitions. [2020-08-22 18:33:47,562 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 541 transitions. Word has length 227 [2020-08-22 18:33:47,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:47,562 INFO L479 AbstractCegarLoop]: Abstraction has 432 states and 541 transitions. [2020-08-22 18:33:47,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 18:33:47,562 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 541 transitions. [2020-08-22 18:33:47,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-08-22 18:33:47,565 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:47,565 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:47,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 18:33:47,565 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:47,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:47,566 INFO L82 PathProgramCache]: Analyzing trace with hash 947853182, now seen corresponding path program 1 times [2020-08-22 18:33:47,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:47,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637191425] [2020-08-22 18:33:47,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:47,568 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 18:33:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-08-22 18:33:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-22 18:33:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-22 18:33:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 18:33:47,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637191425] [2020-08-22 18:33:47,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:47,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:33:47,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108597714] [2020-08-22 18:33:47,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:33:47,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:47,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:33:47,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:33:47,811 INFO L87 Difference]: Start difference. First operand 432 states and 541 transitions. Second operand 5 states. [2020-08-22 18:33:47,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:47,989 INFO L93 Difference]: Finished difference Result 691 states and 868 transitions. [2020-08-22 18:33:47,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:33:47,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 230 [2020-08-22 18:33:47,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:47,993 INFO L225 Difference]: With dead ends: 691 [2020-08-22 18:33:47,993 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 18:33:47,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:33:47,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 18:33:48,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 263. [2020-08-22 18:33:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-08-22 18:33:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 327 transitions. [2020-08-22 18:33:48,043 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 327 transitions. Word has length 230 [2020-08-22 18:33:48,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:48,043 INFO L479 AbstractCegarLoop]: Abstraction has 263 states and 327 transitions. [2020-08-22 18:33:48,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:33:48,044 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 327 transitions. [2020-08-22 18:33:48,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-08-22 18:33:48,045 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:48,045 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:48,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 18:33:48,046 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:48,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:48,046 INFO L82 PathProgramCache]: Analyzing trace with hash -671277925, now seen corresponding path program 1 times [2020-08-22 18:33:48,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:48,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684155954] [2020-08-22 18:33:48,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:48,048 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 18:33:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 18:33:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 18:33:48,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684155954] [2020-08-22 18:33:48,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:48,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 18:33:48,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325270894] [2020-08-22 18:33:48,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 18:33:48,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:48,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 18:33:48,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:33:48,290 INFO L87 Difference]: Start difference. First operand 263 states and 327 transitions. Second operand 8 states. [2020-08-22 18:33:48,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:48,467 INFO L93 Difference]: Finished difference Result 317 states and 389 transitions. [2020-08-22 18:33:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 18:33:48,468 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 236 [2020-08-22 18:33:48,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:48,470 INFO L225 Difference]: With dead ends: 317 [2020-08-22 18:33:48,470 INFO L226 Difference]: Without dead ends: 298 [2020-08-22 18:33:48,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:33:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-08-22 18:33:48,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 269. [2020-08-22 18:33:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-08-22 18:33:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 333 transitions. [2020-08-22 18:33:48,533 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 333 transitions. Word has length 236 [2020-08-22 18:33:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:48,533 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 333 transitions. [2020-08-22 18:33:48,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 18:33:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 333 transitions. [2020-08-22 18:33:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-08-22 18:33:48,535 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:48,535 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:48,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 18:33:48,536 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:48,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:48,536 INFO L82 PathProgramCache]: Analyzing trace with hash 287100319, now seen corresponding path program 1 times [2020-08-22 18:33:48,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:48,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117794833] [2020-08-22 18:33:48,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:48,538 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 18:33:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-22 18:33:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 18:33:48,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117794833] [2020-08-22 18:33:48,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:48,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 18:33:48,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069323281] [2020-08-22 18:33:48,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 18:33:48,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:48,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 18:33:48,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:33:48,857 INFO L87 Difference]: Start difference. First operand 269 states and 333 transitions. Second operand 11 states. [2020-08-22 18:33:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:49,127 INFO L93 Difference]: Finished difference Result 334 states and 403 transitions. [2020-08-22 18:33:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 18:33:49,128 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 240 [2020-08-22 18:33:49,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:49,129 INFO L225 Difference]: With dead ends: 334 [2020-08-22 18:33:49,129 INFO L226 Difference]: Without dead ends: 272 [2020-08-22 18:33:49,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-08-22 18:33:49,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-08-22 18:33:49,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 269. [2020-08-22 18:33:49,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-08-22 18:33:49,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 333 transitions. [2020-08-22 18:33:49,198 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 333 transitions. Word has length 240 [2020-08-22 18:33:49,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:49,200 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 333 transitions. [2020-08-22 18:33:49,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 18:33:49,200 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 333 transitions. [2020-08-22 18:33:49,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-08-22 18:33:49,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:49,202 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:49,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 18:33:49,202 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:49,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:49,202 INFO L82 PathProgramCache]: Analyzing trace with hash -333217243, now seen corresponding path program 1 times [2020-08-22 18:33:49,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:49,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922906872] [2020-08-22 18:33:49,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:49,209 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 18:33:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-22 18:33:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 18:33:49,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922906872] [2020-08-22 18:33:49,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:49,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 18:33:49,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659004715] [2020-08-22 18:33:49,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 18:33:49,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:49,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 18:33:49,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 18:33:49,480 INFO L87 Difference]: Start difference. First operand 269 states and 333 transitions. Second operand 9 states. [2020-08-22 18:33:49,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:49,701 INFO L93 Difference]: Finished difference Result 331 states and 402 transitions. [2020-08-22 18:33:49,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 18:33:49,702 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 241 [2020-08-22 18:33:49,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:49,704 INFO L225 Difference]: With dead ends: 331 [2020-08-22 18:33:49,704 INFO L226 Difference]: Without dead ends: 319 [2020-08-22 18:33:49,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-22 18:33:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-08-22 18:33:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 311. [2020-08-22 18:33:49,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-08-22 18:33:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 382 transitions. [2020-08-22 18:33:49,796 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 382 transitions. Word has length 241 [2020-08-22 18:33:49,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:49,796 INFO L479 AbstractCegarLoop]: Abstraction has 311 states and 382 transitions. [2020-08-22 18:33:49,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 18:33:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 382 transitions. [2020-08-22 18:33:49,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-08-22 18:33:49,798 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:49,799 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:49,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 18:33:49,799 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:49,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:49,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1780452488, now seen corresponding path program 1 times [2020-08-22 18:33:49,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:49,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110914677] [2020-08-22 18:33:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:49,801 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 18:33:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:49,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-22 18:33:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 18:33:50,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110914677] [2020-08-22 18:33:50,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:50,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 18:33:50,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058053571] [2020-08-22 18:33:50,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 18:33:50,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:50,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 18:33:50,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 18:33:50,066 INFO L87 Difference]: Start difference. First operand 311 states and 382 transitions. Second operand 10 states. [2020-08-22 18:33:50,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:50,366 INFO L93 Difference]: Finished difference Result 323 states and 393 transitions. [2020-08-22 18:33:50,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 18:33:50,367 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 244 [2020-08-22 18:33:50,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:50,369 INFO L225 Difference]: With dead ends: 323 [2020-08-22 18:33:50,369 INFO L226 Difference]: Without dead ends: 297 [2020-08-22 18:33:50,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-08-22 18:33:50,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-08-22 18:33:50,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 268. [2020-08-22 18:33:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-22 18:33:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 305 transitions. [2020-08-22 18:33:50,440 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 305 transitions. Word has length 244 [2020-08-22 18:33:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:50,440 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 305 transitions. [2020-08-22 18:33:50,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 18:33:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 305 transitions. [2020-08-22 18:33:50,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-08-22 18:33:50,442 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:50,442 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:50,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 18:33:50,443 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:50,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:50,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1623599199, now seen corresponding path program 1 times [2020-08-22 18:33:50,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:50,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650682280] [2020-08-22 18:33:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:50,445 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:33:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:33:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:33:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-08-22 18:33:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:50,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-08-22 18:33:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:53,295 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 32 [2020-08-22 18:33:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-22 18:33:53,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650682280] [2020-08-22 18:33:53,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:53,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-22 18:33:53,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858698090] [2020-08-22 18:33:53,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 18:33:53,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:53,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 18:33:53,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-22 18:33:53,412 INFO L87 Difference]: Start difference. First operand 268 states and 305 transitions. Second operand 16 states. [2020-08-22 18:34:02,629 WARN L193 SmtUtils]: Spent 6.49 s on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-08-22 18:34:09,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:34:09,367 INFO L93 Difference]: Finished difference Result 327 states and 371 transitions. [2020-08-22 18:34:09,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 18:34:09,376 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 245 [2020-08-22 18:34:09,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:34:09,378 INFO L225 Difference]: With dead ends: 327 [2020-08-22 18:34:09,378 INFO L226 Difference]: Without dead ends: 315 [2020-08-22 18:34:09,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2020-08-22 18:34:09,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-08-22 18:34:09,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 307. [2020-08-22 18:34:09,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-08-22 18:34:09,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 351 transitions. [2020-08-22 18:34:09,433 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 351 transitions. Word has length 245 [2020-08-22 18:34:09,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:34:09,433 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 351 transitions. [2020-08-22 18:34:09,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 18:34:09,433 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 351 transitions. [2020-08-22 18:34:09,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-08-22 18:34:09,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:34:09,435 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:34:09,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 18:34:09,436 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:34:09,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:34:09,436 INFO L82 PathProgramCache]: Analyzing trace with hash 818281555, now seen corresponding path program 2 times [2020-08-22 18:34:09,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:34:09,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902422365] [2020-08-22 18:34:09,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:34:09,438 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:34:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:34:09,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:34:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:34:09,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 18:34:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:34:09,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 18:34:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:34:09,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 18:34:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:34:09,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-22 18:34:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:34:09,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-22 18:34:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:34:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 18:34:09,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902422365] [2020-08-22 18:34:09,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:34:09,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 18:34:09,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622828952] [2020-08-22 18:34:09,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 18:34:09,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:34:09,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 18:34:09,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 18:34:09,794 INFO L87 Difference]: Start difference. First operand 307 states and 351 transitions. Second operand 9 states. [2020-08-22 18:34:10,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:34:10,029 INFO L93 Difference]: Finished difference Result 307 states and 351 transitions. [2020-08-22 18:34:10,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 18:34:10,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 246 [2020-08-22 18:34:10,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:34:10,031 INFO L225 Difference]: With dead ends: 307 [2020-08-22 18:34:10,031 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 18:34:10,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-08-22 18:34:10,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 18:34:10,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 18:34:10,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 18:34:10,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 18:34:10,036 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 246 [2020-08-22 18:34:10,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:34:10,037 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 18:34:10,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 18:34:10,037 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 18:34:10,037 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 18:34:10,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 18:34:10,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 18:34:14,186 WARN L193 SmtUtils]: Spent 3.98 s on a formula simplification. DAG size of input: 492 DAG size of output: 4 [2020-08-22 18:34:17,992 WARN L193 SmtUtils]: Spent 3.80 s on a formula simplification. DAG size of input: 561 DAG size of output: 4 [2020-08-22 18:34:18,565 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 4 [2020-08-22 18:34:19,214 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 4 [2020-08-22 18:34:19,748 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 137 [2020-08-22 18:34:21,348 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 427 DAG size of output: 4 [2020-08-22 18:34:22,291 WARN L193 SmtUtils]: Spent 940.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 4 [2020-08-22 18:34:25,239 WARN L193 SmtUtils]: Spent 2.95 s on a formula simplification. DAG size of input: 526 DAG size of output: 4 [2020-08-22 18:34:25,413 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 4 [2020-08-22 18:34:29,358 WARN L193 SmtUtils]: Spent 3.94 s on a formula simplification. DAG size of input: 601 DAG size of output: 8 [2020-08-22 18:34:32,804 WARN L193 SmtUtils]: Spent 3.40 s on a formula simplification. DAG size of input: 592 DAG size of output: 4 [2020-08-22 18:34:33,262 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 136 [2020-08-22 18:34:35,037 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 459 DAG size of output: 4 [2020-08-22 18:34:35,680 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 4 [2020-08-22 18:34:36,093 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 4 [2020-08-22 18:34:36,300 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 4 [2020-08-22 18:34:36,597 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 136 [2020-08-22 18:34:39,954 WARN L193 SmtUtils]: Spent 3.35 s on a formula simplification. DAG size of input: 592 DAG size of output: 4 [2020-08-22 18:34:40,254 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 136 [2020-08-22 18:34:40,551 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 136 [2020-08-22 18:34:40,667 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 4 [2020-08-22 18:34:41,914 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 396 DAG size of output: 4 [2020-08-22 18:34:42,824 WARN L193 SmtUtils]: Spent 909.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 4 [2020-08-22 18:34:42,936 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 4 [2020-08-22 18:34:45,691 WARN L193 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 499 DAG size of output: 4 [2020-08-22 18:34:49,611 WARN L193 SmtUtils]: Spent 3.92 s on a formula simplification. DAG size of input: 568 DAG size of output: 4 [2020-08-22 18:34:50,248 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 4 [2020-08-22 18:34:50,620 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 4 [2020-08-22 18:34:52,685 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 434 DAG size of output: 4 [2020-08-22 18:34:53,685 WARN L193 SmtUtils]: Spent 998.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 4 [2020-08-22 18:34:56,748 WARN L193 SmtUtils]: Spent 3.06 s on a formula simplification. DAG size of input: 533 DAG size of output: 4 [2020-08-22 18:34:56,972 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 4 [2020-08-22 18:35:02,876 WARN L193 SmtUtils]: Spent 5.90 s on a formula simplification. DAG size of input: 578 DAG size of output: 8 [2020-08-22 18:35:09,057 WARN L193 SmtUtils]: Spent 6.14 s on a formula simplification. DAG size of input: 571 DAG size of output: 4 [2020-08-22 18:35:09,362 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 13 [2020-08-22 18:35:11,561 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 466 DAG size of output: 4 [2020-08-22 18:35:12,337 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 4 [2020-08-22 18:35:12,900 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 4 [2020-08-22 18:35:13,169 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 4 [2020-08-22 18:35:13,473 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 13 [2020-08-22 18:35:19,421 WARN L193 SmtUtils]: Spent 5.95 s on a formula simplification. DAG size of input: 571 DAG size of output: 4 [2020-08-22 18:35:19,727 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 13 [2020-08-22 18:35:20,034 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 13 [2020-08-22 18:35:21,781 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 403 DAG size of output: 4 [2020-08-22 18:35:22,957 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 373 DAG size of output: 4 [2020-08-22 18:35:23,105 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 4 [2020-08-22 18:35:23,628 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 4 [2020-08-22 18:35:23,929 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 4 [2020-08-22 18:35:24,032 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 4 [2020-08-22 18:35:24,285 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 18:35:24,524 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 4 [2020-08-22 18:35:24,657 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 4 [2020-08-22 18:35:24,921 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 4 [2020-08-22 18:35:25,296 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 4 [2020-08-22 18:35:25,613 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 4 [2020-08-22 18:35:25,800 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 18:35:26,036 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 4 [2020-08-22 18:35:26,158 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 4 [2020-08-22 18:35:26,496 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 18:35:26,790 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 4 [2020-08-22 18:35:26,966 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 18:35:27,142 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 18:35:27,354 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 4 [2020-08-22 18:35:27,501 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 4 [2020-08-22 18:35:27,976 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 4 [2020-08-22 18:35:47,858 WARN L193 SmtUtils]: Spent 18.65 s on a formula simplification. DAG size of input: 957 DAG size of output: 9 [2020-08-22 18:36:16,943 WARN L193 SmtUtils]: Spent 29.08 s on a formula simplification. DAG size of input: 1093 DAG size of output: 9 [2020-08-22 18:36:20,476 WARN L193 SmtUtils]: Spent 3.53 s on a formula simplification. DAG size of input: 545 DAG size of output: 9 [2020-08-22 18:36:22,400 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 445 DAG size of output: 9 [2020-08-22 18:36:42,655 WARN L193 SmtUtils]: Spent 20.25 s on a formula simplification. DAG size of input: 1495 DAG size of output: 9 [2020-08-22 18:36:43,009 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2020-08-22 18:36:53,976 WARN L193 SmtUtils]: Spent 10.96 s on a formula simplification. DAG size of input: 829 DAG size of output: 9 [2020-08-22 18:36:59,821 WARN L193 SmtUtils]: Spent 5.84 s on a formula simplification. DAG size of input: 653 DAG size of output: 9 [2020-08-22 18:37:22,910 WARN L193 SmtUtils]: Spent 23.09 s on a formula simplification. DAG size of input: 1024 DAG size of output: 9 [2020-08-22 18:37:23,920 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 353 DAG size of output: 9 [2020-08-22 18:37:56,417 WARN L193 SmtUtils]: Spent 32.49 s on a formula simplification. DAG size of input: 1154 DAG size of output: 11 [2020-08-22 18:37:56,596 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 9 [2020-08-22 18:38:31,337 WARN L193 SmtUtils]: Spent 34.74 s on a formula simplification. DAG size of input: 1135 DAG size of output: 9 [2020-08-22 18:38:49,508 WARN L193 SmtUtils]: Spent 18.17 s on a formula simplification. DAG size of input: 1153 DAG size of output: 991 [2020-08-22 18:39:04,236 WARN L193 SmtUtils]: Spent 14.71 s on a formula simplification. DAG size of input: 892 DAG size of output: 9 [2020-08-22 18:39:09,140 WARN L193 SmtUtils]: Spent 4.90 s on a formula simplification. DAG size of input: 598 DAG size of output: 9 [2020-08-22 18:39:11,770 WARN L193 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 494 DAG size of output: 9 [2020-08-22 18:39:13,170 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 398 DAG size of output: 9 [2020-08-22 18:39:31,433 WARN L193 SmtUtils]: Spent 18.26 s on a formula simplification. DAG size of input: 1154 DAG size of output: 992 [2020-08-22 18:40:04,478 WARN L193 SmtUtils]: Spent 33.04 s on a formula simplification. DAG size of input: 1135 DAG size of output: 9 [2020-08-22 18:40:21,512 WARN L193 SmtUtils]: Spent 17.03 s on a formula simplification. DAG size of input: 1154 DAG size of output: 992 [2020-08-22 18:40:38,309 WARN L193 SmtUtils]: Spent 16.79 s on a formula simplification. DAG size of input: 1154 DAG size of output: 992 [2020-08-22 18:40:38,797 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 9 [2020-08-22 18:40:47,216 WARN L193 SmtUtils]: Spent 8.42 s on a formula simplification. DAG size of input: 768 DAG size of output: 9 [2020-08-22 18:40:54,282 WARN L193 SmtUtils]: Spent 7.06 s on a formula simplification. DAG size of input: 709 DAG size of output: 9 [2020-08-22 18:40:55,021 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 9 [2020-08-22 18:40:55,150 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-08-22 18:41:16,270 WARN L193 SmtUtils]: Spent 20.21 s on a formula simplification. DAG size of input: 957 DAG size of output: 9 [2020-08-22 18:41:48,200 WARN L193 SmtUtils]: Spent 31.93 s on a formula simplification. DAG size of input: 1093 DAG size of output: 9 [2020-08-22 18:41:51,933 WARN L193 SmtUtils]: Spent 3.73 s on a formula simplification. DAG size of input: 545 DAG size of output: 9 [2020-08-22 18:41:54,113 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 445 DAG size of output: 9 [2020-08-22 18:42:18,275 WARN L193 SmtUtils]: Spent 24.16 s on a formula simplification. DAG size of input: 1498 DAG size of output: 9 [2020-08-22 18:42:18,636 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2020-08-22 18:42:31,297 WARN L193 SmtUtils]: Spent 12.65 s on a formula simplification. DAG size of input: 829 DAG size of output: 9 [2020-08-22 18:42:37,590 WARN L193 SmtUtils]: Spent 6.29 s on a formula simplification. DAG size of input: 653 DAG size of output: 9 [2020-08-22 18:43:01,963 WARN L193 SmtUtils]: Spent 24.37 s on a formula simplification. DAG size of input: 1024 DAG size of output: 9 [2020-08-22 18:43:02,992 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 353 DAG size of output: 9 [2020-08-22 18:43:37,251 WARN L193 SmtUtils]: Spent 34.26 s on a formula simplification. DAG size of input: 1159 DAG size of output: 11 [2020-08-22 18:43:37,445 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 9 [2020-08-22 18:44:12,816 WARN L193 SmtUtils]: Spent 35.37 s on a formula simplification. DAG size of input: 1138 DAG size of output: 9 [2020-08-22 18:44:32,197 WARN L193 SmtUtils]: Spent 19.38 s on a formula simplification. DAG size of input: 1158 DAG size of output: 997 [2020-08-22 18:44:47,661 WARN L193 SmtUtils]: Spent 15.45 s on a formula simplification. DAG size of input: 892 DAG size of output: 9 [2020-08-22 18:44:52,677 WARN L193 SmtUtils]: Spent 5.01 s on a formula simplification. DAG size of input: 598 DAG size of output: 9 [2020-08-22 18:44:55,371 WARN L193 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 494 DAG size of output: 9 [2020-08-22 18:44:56,843 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 398 DAG size of output: 9 [2020-08-22 18:45:15,013 WARN L193 SmtUtils]: Spent 18.17 s on a formula simplification. DAG size of input: 1159 DAG size of output: 995 [2020-08-22 18:45:48,409 WARN L193 SmtUtils]: Spent 33.39 s on a formula simplification. DAG size of input: 1138 DAG size of output: 9 [2020-08-22 18:46:07,076 WARN L193 SmtUtils]: Spent 18.66 s on a formula simplification. DAG size of input: 1159 DAG size of output: 998 [2020-08-22 18:46:25,054 WARN L193 SmtUtils]: Spent 17.97 s on a formula simplification. DAG size of input: 1159 DAG size of output: 998 [2020-08-22 18:46:25,559 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 9 [2020-08-22 18:46:34,945 WARN L193 SmtUtils]: Spent 9.38 s on a formula simplification. DAG size of input: 768 DAG size of output: 9 [2020-08-22 18:46:42,220 WARN L193 SmtUtils]: Spent 7.27 s on a formula simplification. DAG size of input: 709 DAG size of output: 9 [2020-08-22 18:46:42,982 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 9 [2020-08-22 18:46:43,123 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-08-22 18:46:45,591 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 445 DAG size of output: 4 [2020-08-22 18:46:48,960 WARN L193 SmtUtils]: Spent 3.37 s on a formula simplification. DAG size of input: 510 DAG size of output: 4 [2020-08-22 18:46:49,412 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 4 [2020-08-22 18:46:49,677 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 4 [2020-08-22 18:46:50,531 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 8