/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:09:59,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:09:59,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:09:59,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:09:59,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:09:59,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:09:59,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:09:59,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:09:59,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:09:59,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:09:59,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:09:59,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:09:59,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:09:59,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:09:59,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:09:59,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:09:59,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:10:00,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:10:00,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:10:00,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:10:00,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:10:00,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:10:00,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:10:00,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:10:00,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:10:00,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:10:00,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:10:00,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:10:00,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:10:00,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 03:10:00,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:10:00,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:10:00,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:10:00,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 03:10:00,086 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:10:00,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:10:00,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:10:00,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:10:00,089 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:10:00,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:10:00,089 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:10:00,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:10:00,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:10:00,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:10:00,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:10:00,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:10:00,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:10:00,092 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:10:00,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:10:00,092 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:10:00,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:10:00,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:10:00,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:10:00,093 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:10:00,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:10:00,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:10:00,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:10:00,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:10:00,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:10:00,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:10:00,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:10:00,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:10:00,095 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:10:00,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-08-22 03:10:00,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:10:00,386 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:10:00,389 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:10:00,391 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:10:00,391 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:10:00,392 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-08-22 03:10:00,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cdade917f/d3f63f6cb75249babb7eebcaecb03765/FLAG35e05eaa2 [2020-08-22 03:10:00,961 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:10:00,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-08-22 03:10:00,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cdade917f/d3f63f6cb75249babb7eebcaecb03765/FLAG35e05eaa2 [2020-08-22 03:10:01,347 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cdade917f/d3f63f6cb75249babb7eebcaecb03765 [2020-08-22 03:10:01,358 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:10:01,360 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:10:01,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:10:01,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:10:01,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:10:01,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:10:01" (1/1) ... [2020-08-22 03:10:01,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dbe4ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:01, skipping insertion in model container [2020-08-22 03:10:01,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:10:01" (1/1) ... [2020-08-22 03:10:01,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:10:01,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:10:01,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:10:01,607 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:10:01,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:10:01,640 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:10:01,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:01 WrapperNode [2020-08-22 03:10:01,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:10:01,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:10:01,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:10:01,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:10:01,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:01" (1/1) ... [2020-08-22 03:10:01,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:01" (1/1) ... [2020-08-22 03:10:01,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:01" (1/1) ... [2020-08-22 03:10:01,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:01" (1/1) ... [2020-08-22 03:10:01,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:01" (1/1) ... [2020-08-22 03:10:01,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:01" (1/1) ... [2020-08-22 03:10:01,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:01" (1/1) ... [2020-08-22 03:10:01,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:10:01,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:10:01,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:10:01,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:10:01,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 03:10:01,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:10:01,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:10:01,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 03:10:01,823 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:10:01,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:10:01,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 03:10:01,824 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:10:01,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 03:10:01,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 03:10:01,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 03:10:01,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 03:10:01,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:10:01,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:10:02,041 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:10:02,041 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 03:10:02,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:10:02 BoogieIcfgContainer [2020-08-22 03:10:02,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:10:02,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:10:02,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:10:02,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:10:02,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:10:01" (1/3) ... [2020-08-22 03:10:02,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59eee81c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:10:02, skipping insertion in model container [2020-08-22 03:10:02,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:10:01" (2/3) ... [2020-08-22 03:10:02,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59eee81c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:10:02, skipping insertion in model container [2020-08-22 03:10:02,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:10:02" (3/3) ... [2020-08-22 03:10:02,054 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-08-22 03:10:02,066 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:10:02,073 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:10:02,089 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:10:02,116 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:10:02,116 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:10:02,116 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:10:02,117 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:10:02,117 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:10:02,117 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:10:02,117 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:10:02,117 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:10:02,148 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-22 03:10:02,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 03:10:02,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:02,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:02,157 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:02,166 INFO L82 PathProgramCache]: Analyzing trace with hash -267856937, now seen corresponding path program 1 times [2020-08-22 03:10:02,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:02,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470927961] [2020-08-22 03:10:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:02,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:02,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470927961] [2020-08-22 03:10:02,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:10:02,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:10:02,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017215271] [2020-08-22 03:10:02,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:10:02,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:02,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:10:02,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:10:02,395 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-08-22 03:10:02,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:02,480 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-08-22 03:10:02,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:10:02,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-08-22 03:10:02,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:02,490 INFO L225 Difference]: With dead ends: 34 [2020-08-22 03:10:02,490 INFO L226 Difference]: Without dead ends: 14 [2020-08-22 03:10:02,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:10:02,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-22 03:10:02,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-22 03:10:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-22 03:10:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-08-22 03:10:02,539 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-08-22 03:10:02,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:02,540 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-08-22 03:10:02,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:10:02,541 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-08-22 03:10:02,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 03:10:02,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:02,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:02,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:10:02,543 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:02,543 INFO L82 PathProgramCache]: Analyzing trace with hash -439631843, now seen corresponding path program 1 times [2020-08-22 03:10:02,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:02,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471979414] [2020-08-22 03:10:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:02,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:02,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471979414] [2020-08-22 03:10:02,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:10:02,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:10:02,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310747316] [2020-08-22 03:10:02,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:10:02,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:02,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:10:02,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:10:02,631 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2020-08-22 03:10:02,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:02,678 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-08-22 03:10:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 03:10:02,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-08-22 03:10:02,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:02,680 INFO L225 Difference]: With dead ends: 22 [2020-08-22 03:10:02,681 INFO L226 Difference]: Without dead ends: 16 [2020-08-22 03:10:02,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:10:02,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-22 03:10:02,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-08-22 03:10:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-22 03:10:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-08-22 03:10:02,688 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-08-22 03:10:02,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:02,689 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-08-22 03:10:02,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:10:02,689 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-08-22 03:10:02,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 03:10:02,690 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:02,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:02,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:10:02,691 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:02,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:02,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1874839487, now seen corresponding path program 1 times [2020-08-22 03:10:02,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:02,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275019919] [2020-08-22 03:10:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:02,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:02,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275019919] [2020-08-22 03:10:02,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:02,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 03:10:02,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434143382] [2020-08-22 03:10:02,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:10:02,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:02,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:10:02,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:10:02,763 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-08-22 03:10:02,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:02,811 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-08-22 03:10:02,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:10:02,812 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 03:10:02,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:02,813 INFO L225 Difference]: With dead ends: 24 [2020-08-22 03:10:02,813 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 03:10:02,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:10:02,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 03:10:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-08-22 03:10:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-22 03:10:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-08-22 03:10:02,820 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-08-22 03:10:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:02,820 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-08-22 03:10:02,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:10:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-08-22 03:10:02,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 03:10:02,822 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:02,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:02,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:10:02,822 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:02,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:02,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1288728289, now seen corresponding path program 2 times [2020-08-22 03:10:02,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:02,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891196476] [2020-08-22 03:10:02,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:02,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:02,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891196476] [2020-08-22 03:10:02,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:02,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 03:10:02,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307272394] [2020-08-22 03:10:02,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:10:02,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:02,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:10:02,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:10:02,910 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-08-22 03:10:02,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:02,959 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-08-22 03:10:02,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 03:10:02,960 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-08-22 03:10:02,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:02,960 INFO L225 Difference]: With dead ends: 26 [2020-08-22 03:10:02,961 INFO L226 Difference]: Without dead ends: 20 [2020-08-22 03:10:02,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:10:02,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-22 03:10:02,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-08-22 03:10:02,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-22 03:10:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-08-22 03:10:02,968 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-08-22 03:10:02,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:02,968 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-08-22 03:10:02,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:10:02,969 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-08-22 03:10:02,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 03:10:02,969 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:02,970 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:02,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:10:02,970 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:02,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:02,971 INFO L82 PathProgramCache]: Analyzing trace with hash 676582787, now seen corresponding path program 3 times [2020-08-22 03:10:02,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:02,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130625925] [2020-08-22 03:10:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:03,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:03,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130625925] [2020-08-22 03:10:03,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:03,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 03:10:03,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324143723] [2020-08-22 03:10:03,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 03:10:03,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:03,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 03:10:03,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:10:03,113 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-08-22 03:10:03,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:03,208 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-08-22 03:10:03,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 03:10:03,209 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-08-22 03:10:03,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:03,210 INFO L225 Difference]: With dead ends: 28 [2020-08-22 03:10:03,210 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 03:10:03,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:10:03,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 03:10:03,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-22 03:10:03,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 03:10:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-08-22 03:10:03,222 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-08-22 03:10:03,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:03,222 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-08-22 03:10:03,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 03:10:03,222 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-08-22 03:10:03,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:10:03,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:03,224 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:03,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:10:03,224 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:03,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:03,225 INFO L82 PathProgramCache]: Analyzing trace with hash 815274917, now seen corresponding path program 4 times [2020-08-22 03:10:03,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:03,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967192617] [2020-08-22 03:10:03,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:03,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:03,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967192617] [2020-08-22 03:10:03,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:03,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 03:10:03,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558820657] [2020-08-22 03:10:03,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 03:10:03,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:03,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 03:10:03,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:10:03,331 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-08-22 03:10:03,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:03,388 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-08-22 03:10:03,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 03:10:03,389 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-22 03:10:03,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:03,390 INFO L225 Difference]: With dead ends: 30 [2020-08-22 03:10:03,390 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 03:10:03,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:10:03,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 03:10:03,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-22 03:10:03,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 03:10:03,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-08-22 03:10:03,397 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-08-22 03:10:03,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:03,397 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-08-22 03:10:03,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 03:10:03,398 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-08-22 03:10:03,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 03:10:03,398 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:03,399 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:03,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:10:03,399 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:03,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:03,400 INFO L82 PathProgramCache]: Analyzing trace with hash 954425671, now seen corresponding path program 5 times [2020-08-22 03:10:03,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:03,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264800326] [2020-08-22 03:10:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:03,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:03,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264800326] [2020-08-22 03:10:03,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:03,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 03:10:03,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449478630] [2020-08-22 03:10:03,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 03:10:03,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:03,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 03:10:03,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:10:03,487 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-08-22 03:10:03,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:03,548 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-08-22 03:10:03,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 03:10:03,548 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-08-22 03:10:03,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:03,549 INFO L225 Difference]: With dead ends: 32 [2020-08-22 03:10:03,549 INFO L226 Difference]: Without dead ends: 26 [2020-08-22 03:10:03,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:10:03,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-22 03:10:03,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-08-22 03:10:03,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 03:10:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-08-22 03:10:03,559 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-08-22 03:10:03,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:03,560 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-08-22 03:10:03,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 03:10:03,561 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-08-22 03:10:03,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 03:10:03,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:03,563 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:03,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:10:03,563 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:03,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:03,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1534314089, now seen corresponding path program 6 times [2020-08-22 03:10:03,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:03,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624661090] [2020-08-22 03:10:03,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:03,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:03,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624661090] [2020-08-22 03:10:03,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:03,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 03:10:03,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674473940] [2020-08-22 03:10:03,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 03:10:03,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:03,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 03:10:03,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:10:03,693 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-08-22 03:10:03,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:03,759 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-08-22 03:10:03,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:10:03,760 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-08-22 03:10:03,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:03,761 INFO L225 Difference]: With dead ends: 34 [2020-08-22 03:10:03,761 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 03:10:03,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:10:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 03:10:03,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-22 03:10:03,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 03:10:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-08-22 03:10:03,767 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-08-22 03:10:03,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:03,768 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-08-22 03:10:03,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 03:10:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-08-22 03:10:03,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 03:10:03,769 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:03,769 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:03,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:10:03,770 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:03,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:03,770 INFO L82 PathProgramCache]: Analyzing trace with hash 461335307, now seen corresponding path program 7 times [2020-08-22 03:10:03,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:03,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10126935] [2020-08-22 03:10:03,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:03,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:03,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10126935] [2020-08-22 03:10:03,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:03,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 03:10:03,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901247783] [2020-08-22 03:10:03,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 03:10:03,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:03,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 03:10:03,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:10:03,881 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-08-22 03:10:03,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:03,950 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-08-22 03:10:03,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 03:10:03,950 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-08-22 03:10:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:03,951 INFO L225 Difference]: With dead ends: 36 [2020-08-22 03:10:03,952 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 03:10:03,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:10:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 03:10:03,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-22 03:10:03,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 03:10:03,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-08-22 03:10:03,958 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-08-22 03:10:03,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:03,958 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-08-22 03:10:03,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 03:10:03,959 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-08-22 03:10:03,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 03:10:03,959 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:03,960 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:03,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 03:10:03,960 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:03,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:03,961 INFO L82 PathProgramCache]: Analyzing trace with hash 120876845, now seen corresponding path program 8 times [2020-08-22 03:10:03,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:03,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848656484] [2020-08-22 03:10:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:04,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:04,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848656484] [2020-08-22 03:10:04,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:04,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 03:10:04,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927262429] [2020-08-22 03:10:04,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 03:10:04,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:04,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 03:10:04,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-22 03:10:04,086 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-08-22 03:10:04,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:04,171 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-08-22 03:10:04,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 03:10:04,172 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-08-22 03:10:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:04,173 INFO L225 Difference]: With dead ends: 38 [2020-08-22 03:10:04,173 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 03:10:04,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-22 03:10:04,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 03:10:04,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-22 03:10:04,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 03:10:04,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-08-22 03:10:04,180 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-08-22 03:10:04,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:04,180 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-08-22 03:10:04,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 03:10:04,181 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-08-22 03:10:04,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 03:10:04,181 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:04,182 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:04,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 03:10:04,182 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:04,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:04,183 INFO L82 PathProgramCache]: Analyzing trace with hash -642190641, now seen corresponding path program 9 times [2020-08-22 03:10:04,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:04,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792696006] [2020-08-22 03:10:04,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:04,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:04,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792696006] [2020-08-22 03:10:04,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:04,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 03:10:04,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812337833] [2020-08-22 03:10:04,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 03:10:04,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:04,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 03:10:04,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:10:04,325 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 13 states. [2020-08-22 03:10:04,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:04,398 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-08-22 03:10:04,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 03:10:04,399 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-08-22 03:10:04,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:04,400 INFO L225 Difference]: With dead ends: 40 [2020-08-22 03:10:04,400 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 03:10:04,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:10:04,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 03:10:04,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-22 03:10:04,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 03:10:04,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-08-22 03:10:04,406 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-08-22 03:10:04,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:04,406 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-08-22 03:10:04,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 03:10:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-08-22 03:10:04,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 03:10:04,408 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:04,408 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:04,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 03:10:04,408 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:04,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:04,409 INFO L82 PathProgramCache]: Analyzing trace with hash 489362929, now seen corresponding path program 10 times [2020-08-22 03:10:04,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:04,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326590932] [2020-08-22 03:10:04,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:04,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:04,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326590932] [2020-08-22 03:10:04,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:04,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 03:10:04,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062209693] [2020-08-22 03:10:04,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 03:10:04,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:04,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 03:10:04,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:10:04,551 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-08-22 03:10:04,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:04,621 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-08-22 03:10:04,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 03:10:04,622 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-08-22 03:10:04,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:04,623 INFO L225 Difference]: With dead ends: 42 [2020-08-22 03:10:04,623 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 03:10:04,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:10:04,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 03:10:04,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-22 03:10:04,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 03:10:04,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-08-22 03:10:04,628 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-08-22 03:10:04,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:04,629 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-08-22 03:10:04,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 03:10:04,629 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-08-22 03:10:04,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 03:10:04,630 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:04,630 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:04,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 03:10:04,631 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:04,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:04,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1285617811, now seen corresponding path program 11 times [2020-08-22 03:10:04,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:04,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154638505] [2020-08-22 03:10:04,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:04,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:04,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154638505] [2020-08-22 03:10:04,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:04,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 03:10:04,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840252161] [2020-08-22 03:10:04,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 03:10:04,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:04,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 03:10:04,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:10:04,794 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 15 states. [2020-08-22 03:10:04,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:04,880 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-08-22 03:10:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 03:10:04,880 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-08-22 03:10:04,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:04,881 INFO L225 Difference]: With dead ends: 44 [2020-08-22 03:10:04,881 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 03:10:04,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:10:04,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 03:10:04,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-22 03:10:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 03:10:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-08-22 03:10:04,887 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-08-22 03:10:04,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:04,888 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-08-22 03:10:04,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 03:10:04,888 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-08-22 03:10:04,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 03:10:04,889 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:04,889 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:04,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 03:10:04,889 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:04,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:04,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1982380725, now seen corresponding path program 12 times [2020-08-22 03:10:04,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:04,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112800421] [2020-08-22 03:10:04,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:05,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:05,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112800421] [2020-08-22 03:10:05,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:05,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 03:10:05,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221118660] [2020-08-22 03:10:05,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 03:10:05,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:05,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 03:10:05,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-22 03:10:05,081 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2020-08-22 03:10:05,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:05,170 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-08-22 03:10:05,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 03:10:05,170 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-08-22 03:10:05,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:05,171 INFO L225 Difference]: With dead ends: 46 [2020-08-22 03:10:05,171 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 03:10:05,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-22 03:10:05,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 03:10:05,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-22 03:10:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 03:10:05,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-08-22 03:10:05,179 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-08-22 03:10:05,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:05,180 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-08-22 03:10:05,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 03:10:05,180 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-08-22 03:10:05,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 03:10:05,181 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:05,181 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:05,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 03:10:05,182 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:05,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:05,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1556642903, now seen corresponding path program 13 times [2020-08-22 03:10:05,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:05,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465492464] [2020-08-22 03:10:05,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:05,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:05,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465492464] [2020-08-22 03:10:05,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:05,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 03:10:05,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086448515] [2020-08-22 03:10:05,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 03:10:05,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:05,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 03:10:05,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-22 03:10:05,364 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 17 states. [2020-08-22 03:10:05,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:05,460 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-08-22 03:10:05,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 03:10:05,461 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-08-22 03:10:05,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:05,462 INFO L225 Difference]: With dead ends: 48 [2020-08-22 03:10:05,462 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 03:10:05,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-22 03:10:05,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 03:10:05,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-22 03:10:05,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 03:10:05,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-08-22 03:10:05,472 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-08-22 03:10:05,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:05,473 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-08-22 03:10:05,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 03:10:05,473 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-08-22 03:10:05,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 03:10:05,474 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:05,474 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:05,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 03:10:05,474 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:05,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:05,475 INFO L82 PathProgramCache]: Analyzing trace with hash 444489081, now seen corresponding path program 14 times [2020-08-22 03:10:05,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:05,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497842936] [2020-08-22 03:10:05,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:05,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:05,721 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:05,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497842936] [2020-08-22 03:10:05,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:05,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 03:10:05,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428913563] [2020-08-22 03:10:05,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 03:10:05,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:05,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 03:10:05,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-22 03:10:05,724 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 18 states. [2020-08-22 03:10:05,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:05,845 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-08-22 03:10:05,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 03:10:05,845 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-08-22 03:10:05,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:05,846 INFO L225 Difference]: With dead ends: 50 [2020-08-22 03:10:05,847 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 03:10:05,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-22 03:10:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 03:10:05,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-22 03:10:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 03:10:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-08-22 03:10:05,853 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-08-22 03:10:05,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:05,853 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-08-22 03:10:05,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 03:10:05,853 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-08-22 03:10:05,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 03:10:05,854 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:05,854 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:05,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 03:10:05,854 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:05,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:05,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1111522843, now seen corresponding path program 15 times [2020-08-22 03:10:05,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:05,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964950091] [2020-08-22 03:10:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:06,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:06,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964950091] [2020-08-22 03:10:06,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:06,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 03:10:06,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232026178] [2020-08-22 03:10:06,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 03:10:06,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:06,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 03:10:06,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-22 03:10:06,091 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 19 states. [2020-08-22 03:10:06,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:06,213 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-08-22 03:10:06,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 03:10:06,214 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-08-22 03:10:06,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:06,215 INFO L225 Difference]: With dead ends: 52 [2020-08-22 03:10:06,215 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 03:10:06,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-22 03:10:06,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 03:10:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-22 03:10:06,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 03:10:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-08-22 03:10:06,220 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-08-22 03:10:06,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:06,221 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-08-22 03:10:06,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 03:10:06,221 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-08-22 03:10:06,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 03:10:06,222 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:06,222 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:06,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 03:10:06,222 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:06,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:06,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2114126275, now seen corresponding path program 16 times [2020-08-22 03:10:06,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:06,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810121553] [2020-08-22 03:10:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:06,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:06,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810121553] [2020-08-22 03:10:06,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:06,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 03:10:06,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533569267] [2020-08-22 03:10:06,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 03:10:06,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:06,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 03:10:06,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-22 03:10:06,468 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 20 states. [2020-08-22 03:10:06,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:06,579 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-08-22 03:10:06,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 03:10:06,580 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-08-22 03:10:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:06,581 INFO L225 Difference]: With dead ends: 54 [2020-08-22 03:10:06,581 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 03:10:06,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-22 03:10:06,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 03:10:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-08-22 03:10:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 03:10:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-08-22 03:10:06,587 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-08-22 03:10:06,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:06,588 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-08-22 03:10:06,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 03:10:06,588 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-08-22 03:10:06,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 03:10:06,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:06,589 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:06,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 03:10:06,589 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:06,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:06,590 INFO L82 PathProgramCache]: Analyzing trace with hash -996540961, now seen corresponding path program 17 times [2020-08-22 03:10:06,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:06,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188771623] [2020-08-22 03:10:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:06,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:06,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188771623] [2020-08-22 03:10:06,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:06,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 03:10:06,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324515114] [2020-08-22 03:10:06,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 03:10:06,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:06,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 03:10:06,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-22 03:10:06,836 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 21 states. [2020-08-22 03:10:06,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:06,940 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-08-22 03:10:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 03:10:06,941 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-08-22 03:10:06,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:06,942 INFO L225 Difference]: With dead ends: 56 [2020-08-22 03:10:06,942 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 03:10:06,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-22 03:10:06,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 03:10:06,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-08-22 03:10:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 03:10:06,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-08-22 03:10:06,948 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-08-22 03:10:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:06,949 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-08-22 03:10:06,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 03:10:06,949 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-08-22 03:10:06,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 03:10:06,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:06,952 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:06,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 03:10:06,952 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:06,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:06,953 INFO L82 PathProgramCache]: Analyzing trace with hash -738878207, now seen corresponding path program 18 times [2020-08-22 03:10:06,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:06,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359114984] [2020-08-22 03:10:06,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:07,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:07,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359114984] [2020-08-22 03:10:07,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:07,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 03:10:07,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886437288] [2020-08-22 03:10:07,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 03:10:07,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:07,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 03:10:07,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-22 03:10:07,296 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 22 states. [2020-08-22 03:10:07,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:07,373 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-08-22 03:10:07,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 03:10:07,373 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-08-22 03:10:07,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:07,374 INFO L225 Difference]: With dead ends: 58 [2020-08-22 03:10:07,374 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 03:10:07,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-22 03:10:07,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 03:10:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-22 03:10:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 03:10:07,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-08-22 03:10:07,386 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-08-22 03:10:07,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:07,387 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-08-22 03:10:07,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 03:10:07,387 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-08-22 03:10:07,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 03:10:07,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:07,388 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:07,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 03:10:07,389 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:07,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:07,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2061892515, now seen corresponding path program 19 times [2020-08-22 03:10:07,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:07,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846626509] [2020-08-22 03:10:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:07,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:07,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846626509] [2020-08-22 03:10:07,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:07,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 03:10:07,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091632586] [2020-08-22 03:10:07,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 03:10:07,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:07,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 03:10:07,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-22 03:10:07,715 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 23 states. [2020-08-22 03:10:07,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:07,848 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-08-22 03:10:07,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 03:10:07,848 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-08-22 03:10:07,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:07,849 INFO L225 Difference]: With dead ends: 60 [2020-08-22 03:10:07,849 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 03:10:07,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-22 03:10:07,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 03:10:07,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-08-22 03:10:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 03:10:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-08-22 03:10:07,856 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-08-22 03:10:07,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:07,857 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-08-22 03:10:07,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 03:10:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-08-22 03:10:07,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 03:10:07,860 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:07,861 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:07,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 03:10:07,861 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:07,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:07,861 INFO L82 PathProgramCache]: Analyzing trace with hash 658061765, now seen corresponding path program 20 times [2020-08-22 03:10:07,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:07,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223156215] [2020-08-22 03:10:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:08,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:08,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223156215] [2020-08-22 03:10:08,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:08,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 03:10:08,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695007623] [2020-08-22 03:10:08,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 03:10:08,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:08,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 03:10:08,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-08-22 03:10:08,238 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 24 states. [2020-08-22 03:10:08,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:08,329 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-08-22 03:10:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 03:10:08,330 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-08-22 03:10:08,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:08,331 INFO L225 Difference]: With dead ends: 62 [2020-08-22 03:10:08,331 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 03:10:08,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-08-22 03:10:08,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 03:10:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-22 03:10:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 03:10:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-08-22 03:10:08,335 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-08-22 03:10:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:08,336 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-08-22 03:10:08,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 03:10:08,336 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-08-22 03:10:08,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 03:10:08,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:08,336 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:08,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 03:10:08,337 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:08,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:08,337 INFO L82 PathProgramCache]: Analyzing trace with hash 196441959, now seen corresponding path program 21 times [2020-08-22 03:10:08,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:08,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949766818] [2020-08-22 03:10:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:08,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:08,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949766818] [2020-08-22 03:10:08,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:08,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 03:10:08,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843278343] [2020-08-22 03:10:08,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 03:10:08,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:08,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 03:10:08,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-08-22 03:10:08,657 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 25 states. [2020-08-22 03:10:08,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:08,777 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-08-22 03:10:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 03:10:08,778 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-08-22 03:10:08,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:08,778 INFO L225 Difference]: With dead ends: 64 [2020-08-22 03:10:08,779 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 03:10:08,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-08-22 03:10:08,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 03:10:08,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-22 03:10:08,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 03:10:08,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-08-22 03:10:08,787 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-08-22 03:10:08,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:08,790 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-08-22 03:10:08,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 03:10:08,790 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-08-22 03:10:08,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 03:10:08,791 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:08,791 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:08,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 03:10:08,792 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:08,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:08,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1038560119, now seen corresponding path program 22 times [2020-08-22 03:10:08,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:08,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176830536] [2020-08-22 03:10:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:09,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:09,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176830536] [2020-08-22 03:10:09,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:09,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 03:10:09,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524091331] [2020-08-22 03:10:09,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 03:10:09,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:09,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 03:10:09,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-08-22 03:10:09,150 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 26 states. [2020-08-22 03:10:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:09,301 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-08-22 03:10:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 03:10:09,301 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-08-22 03:10:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:09,302 INFO L225 Difference]: With dead ends: 66 [2020-08-22 03:10:09,302 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 03:10:09,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-08-22 03:10:09,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 03:10:09,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-08-22 03:10:09,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 03:10:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-08-22 03:10:09,308 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-08-22 03:10:09,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:09,308 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-08-22 03:10:09,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 03:10:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-08-22 03:10:09,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 03:10:09,309 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:09,310 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:09,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 03:10:09,314 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:09,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:09,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1830383915, now seen corresponding path program 23 times [2020-08-22 03:10:09,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:09,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343839988] [2020-08-22 03:10:09,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:09,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:09,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343839988] [2020-08-22 03:10:09,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:09,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 03:10:09,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964435945] [2020-08-22 03:10:09,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 03:10:09,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:09,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 03:10:09,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-08-22 03:10:09,741 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 27 states. [2020-08-22 03:10:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:09,893 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-08-22 03:10:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 03:10:09,893 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-08-22 03:10:09,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:09,894 INFO L225 Difference]: With dead ends: 68 [2020-08-22 03:10:09,894 INFO L226 Difference]: Without dead ends: 62 [2020-08-22 03:10:09,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-08-22 03:10:09,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-22 03:10:09,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-08-22 03:10:09,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 03:10:09,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-08-22 03:10:09,898 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-08-22 03:10:09,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:09,899 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-08-22 03:10:09,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 03:10:09,899 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-08-22 03:10:09,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 03:10:09,900 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:09,900 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:09,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 03:10:09,900 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:09,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:09,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1516596557, now seen corresponding path program 24 times [2020-08-22 03:10:09,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:09,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141828981] [2020-08-22 03:10:09,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:10,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:10,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141828981] [2020-08-22 03:10:10,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:10,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 03:10:10,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058059654] [2020-08-22 03:10:10,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 03:10:10,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:10,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 03:10:10,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-08-22 03:10:10,283 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 28 states. [2020-08-22 03:10:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:10,458 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-08-22 03:10:10,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 03:10:10,459 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-08-22 03:10:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:10,459 INFO L225 Difference]: With dead ends: 70 [2020-08-22 03:10:10,460 INFO L226 Difference]: Without dead ends: 64 [2020-08-22 03:10:10,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-08-22 03:10:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-22 03:10:10,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-08-22 03:10:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 03:10:10,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-08-22 03:10:10,464 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-08-22 03:10:10,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:10,465 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-08-22 03:10:10,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 03:10:10,465 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-08-22 03:10:10,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 03:10:10,465 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:10,466 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:10,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 03:10:10,466 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:10,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:10,466 INFO L82 PathProgramCache]: Analyzing trace with hash 614656239, now seen corresponding path program 25 times [2020-08-22 03:10:10,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:10,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596280788] [2020-08-22 03:10:10,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:10,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:10,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596280788] [2020-08-22 03:10:10,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:10,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 03:10:10,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201403587] [2020-08-22 03:10:10,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 03:10:10,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:10,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 03:10:10,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-08-22 03:10:10,933 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 29 states. [2020-08-22 03:10:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:11,092 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-08-22 03:10:11,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 03:10:11,093 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-08-22 03:10:11,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:11,094 INFO L225 Difference]: With dead ends: 72 [2020-08-22 03:10:11,094 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 03:10:11,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-08-22 03:10:11,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 03:10:11,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-08-22 03:10:11,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 03:10:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-08-22 03:10:11,100 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-08-22 03:10:11,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:11,101 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-08-22 03:10:11,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 03:10:11,101 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-08-22 03:10:11,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-22 03:10:11,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:11,102 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:11,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 03:10:11,102 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:11,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:11,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1433404433, now seen corresponding path program 26 times [2020-08-22 03:10:11,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:11,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602785407] [2020-08-22 03:10:11,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:11,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:11,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602785407] [2020-08-22 03:10:11,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:11,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 03:10:11,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262967444] [2020-08-22 03:10:11,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 03:10:11,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:11,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 03:10:11,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-08-22 03:10:11,590 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 30 states. [2020-08-22 03:10:11,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:11,763 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-08-22 03:10:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 03:10:11,764 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-08-22 03:10:11,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:11,765 INFO L225 Difference]: With dead ends: 74 [2020-08-22 03:10:11,765 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 03:10:11,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-08-22 03:10:11,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 03:10:11,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-08-22 03:10:11,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 03:10:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-08-22 03:10:11,770 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-08-22 03:10:11,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:11,770 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-08-22 03:10:11,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 03:10:11,771 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-08-22 03:10:11,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 03:10:11,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:11,771 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:11,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 03:10:11,772 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:11,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:11,772 INFO L82 PathProgramCache]: Analyzing trace with hash -2023563597, now seen corresponding path program 27 times [2020-08-22 03:10:11,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:11,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191201882] [2020-08-22 03:10:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:12,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:12,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191201882] [2020-08-22 03:10:12,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:12,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 03:10:12,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378697693] [2020-08-22 03:10:12,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 03:10:12,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:12,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 03:10:12,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-08-22 03:10:12,331 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 31 states. [2020-08-22 03:10:12,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:12,505 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-08-22 03:10:12,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 03:10:12,506 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-08-22 03:10:12,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:12,507 INFO L225 Difference]: With dead ends: 76 [2020-08-22 03:10:12,507 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 03:10:12,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-08-22 03:10:12,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 03:10:12,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-08-22 03:10:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 03:10:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-08-22 03:10:12,512 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-08-22 03:10:12,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:12,512 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-08-22 03:10:12,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 03:10:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-08-22 03:10:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 03:10:12,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:12,513 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:12,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 03:10:12,513 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:12,514 INFO L82 PathProgramCache]: Analyzing trace with hash 134846677, now seen corresponding path program 28 times [2020-08-22 03:10:12,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:12,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577900409] [2020-08-22 03:10:12,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:13,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:13,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577900409] [2020-08-22 03:10:13,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:13,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 03:10:13,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303681870] [2020-08-22 03:10:13,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 03:10:13,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:13,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 03:10:13,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-08-22 03:10:13,166 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 32 states. [2020-08-22 03:10:13,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:13,410 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-08-22 03:10:13,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 03:10:13,411 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-08-22 03:10:13,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:13,412 INFO L225 Difference]: With dead ends: 78 [2020-08-22 03:10:13,413 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 03:10:13,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-08-22 03:10:13,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 03:10:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-08-22 03:10:13,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-22 03:10:13,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-08-22 03:10:13,420 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-08-22 03:10:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:13,420 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-08-22 03:10:13,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 03:10:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-08-22 03:10:13,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-22 03:10:13,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:13,422 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:13,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 03:10:13,422 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:13,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:13,423 INFO L82 PathProgramCache]: Analyzing trace with hash -102083977, now seen corresponding path program 29 times [2020-08-22 03:10:13,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:13,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674804712] [2020-08-22 03:10:13,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:14,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:14,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674804712] [2020-08-22 03:10:14,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:14,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 03:10:14,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903458603] [2020-08-22 03:10:14,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 03:10:14,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:14,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 03:10:14,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 03:10:14,081 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 33 states. [2020-08-22 03:10:14,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:14,272 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-08-22 03:10:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 03:10:14,272 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-08-22 03:10:14,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:14,273 INFO L225 Difference]: With dead ends: 80 [2020-08-22 03:10:14,273 INFO L226 Difference]: Without dead ends: 74 [2020-08-22 03:10:14,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 03:10:14,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-22 03:10:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-08-22 03:10:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 03:10:14,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-08-22 03:10:14,277 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-08-22 03:10:14,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:14,278 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-08-22 03:10:14,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 03:10:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-08-22 03:10:14,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 03:10:14,279 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:14,279 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:14,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 03:10:14,280 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:14,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:14,280 INFO L82 PathProgramCache]: Analyzing trace with hash -159175783, now seen corresponding path program 30 times [2020-08-22 03:10:14,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:14,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514470579] [2020-08-22 03:10:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:14,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:15,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514470579] [2020-08-22 03:10:15,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:15,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 03:10:15,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349386965] [2020-08-22 03:10:15,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 03:10:15,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:15,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 03:10:15,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 03:10:15,015 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 34 states. [2020-08-22 03:10:15,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:15,264 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-08-22 03:10:15,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 03:10:15,265 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-08-22 03:10:15,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:15,266 INFO L225 Difference]: With dead ends: 82 [2020-08-22 03:10:15,267 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 03:10:15,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 03:10:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 03:10:15,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-22 03:10:15,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 03:10:15,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-08-22 03:10:15,278 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-08-22 03:10:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:15,278 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-08-22 03:10:15,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 03:10:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-08-22 03:10:15,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 03:10:15,280 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:15,280 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:15,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 03:10:15,281 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:15,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:15,281 INFO L82 PathProgramCache]: Analyzing trace with hash 810173499, now seen corresponding path program 31 times [2020-08-22 03:10:15,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:15,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234200641] [2020-08-22 03:10:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:15,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:15,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234200641] [2020-08-22 03:10:15,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:15,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-22 03:10:15,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901735232] [2020-08-22 03:10:15,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 03:10:15,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:15,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 03:10:15,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 03:10:15,939 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 35 states. [2020-08-22 03:10:16,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:16,151 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-08-22 03:10:16,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 03:10:16,151 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-08-22 03:10:16,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:16,152 INFO L225 Difference]: With dead ends: 84 [2020-08-22 03:10:16,152 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 03:10:16,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 03:10:16,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 03:10:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-08-22 03:10:16,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 03:10:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-08-22 03:10:16,161 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-08-22 03:10:16,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:16,162 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-08-22 03:10:16,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 03:10:16,162 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-08-22 03:10:16,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-22 03:10:16,163 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:16,163 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:16,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 03:10:16,163 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:16,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:16,164 INFO L82 PathProgramCache]: Analyzing trace with hash 346930269, now seen corresponding path program 32 times [2020-08-22 03:10:16,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:16,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098677077] [2020-08-22 03:10:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:16,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:16,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098677077] [2020-08-22 03:10:16,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:16,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 03:10:16,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441564000] [2020-08-22 03:10:16,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 03:10:16,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:16,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 03:10:16,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 03:10:16,939 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 36 states. [2020-08-22 03:10:17,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:17,102 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-08-22 03:10:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-22 03:10:17,102 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-08-22 03:10:17,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:17,103 INFO L225 Difference]: With dead ends: 86 [2020-08-22 03:10:17,103 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 03:10:17,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 03:10:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 03:10:17,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-08-22 03:10:17,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 03:10:17,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-08-22 03:10:17,108 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-08-22 03:10:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:17,109 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-08-22 03:10:17,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 03:10:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-08-22 03:10:17,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 03:10:17,110 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:17,110 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:17,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 03:10:17,110 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:17,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:17,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1846785023, now seen corresponding path program 33 times [2020-08-22 03:10:17,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:17,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908036533] [2020-08-22 03:10:17,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:17,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:17,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908036533] [2020-08-22 03:10:17,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:17,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-22 03:10:17,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196723266] [2020-08-22 03:10:17,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 03:10:17,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:17,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 03:10:17,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 03:10:17,818 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 37 states. [2020-08-22 03:10:18,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:18,056 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-08-22 03:10:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 03:10:18,056 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-08-22 03:10:18,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:18,057 INFO L225 Difference]: With dead ends: 88 [2020-08-22 03:10:18,057 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 03:10:18,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 03:10:18,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 03:10:18,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-08-22 03:10:18,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 03:10:18,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-08-22 03:10:18,062 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-08-22 03:10:18,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:18,062 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-08-22 03:10:18,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 03:10:18,063 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-08-22 03:10:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 03:10:18,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:18,063 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:18,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 03:10:18,064 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:18,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:18,064 INFO L82 PathProgramCache]: Analyzing trace with hash 98192161, now seen corresponding path program 34 times [2020-08-22 03:10:18,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:18,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544384600] [2020-08-22 03:10:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:18,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:19,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544384600] [2020-08-22 03:10:19,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:19,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 03:10:19,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710135929] [2020-08-22 03:10:19,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 03:10:19,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:19,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 03:10:19,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 03:10:19,014 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 38 states. [2020-08-22 03:10:19,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:19,276 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-08-22 03:10:19,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 03:10:19,277 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-08-22 03:10:19,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:19,278 INFO L225 Difference]: With dead ends: 90 [2020-08-22 03:10:19,279 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 03:10:19,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 03:10:19,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 03:10:19,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-08-22 03:10:19,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 03:10:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-08-22 03:10:19,285 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-08-22 03:10:19,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:19,286 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-08-22 03:10:19,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 03:10:19,286 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-08-22 03:10:19,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-22 03:10:19,287 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:19,287 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:19,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 03:10:19,288 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:19,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:19,288 INFO L82 PathProgramCache]: Analyzing trace with hash -967335485, now seen corresponding path program 35 times [2020-08-22 03:10:19,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:19,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261650065] [2020-08-22 03:10:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:20,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:20,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261650065] [2020-08-22 03:10:20,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:20,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-22 03:10:20,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771026467] [2020-08-22 03:10:20,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-22 03:10:20,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:20,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-22 03:10:20,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 03:10:20,094 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 39 states. [2020-08-22 03:10:20,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:20,254 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-08-22 03:10:20,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-22 03:10:20,255 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-08-22 03:10:20,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:20,256 INFO L225 Difference]: With dead ends: 92 [2020-08-22 03:10:20,256 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 03:10:20,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 03:10:20,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 03:10:20,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-08-22 03:10:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 03:10:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-08-22 03:10:20,262 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-08-22 03:10:20,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:20,262 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-08-22 03:10:20,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-22 03:10:20,262 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-08-22 03:10:20,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 03:10:20,263 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:20,263 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:20,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 03:10:20,264 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:20,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:20,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1557780453, now seen corresponding path program 36 times [2020-08-22 03:10:20,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:20,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174903460] [2020-08-22 03:10:20,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:21,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:21,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174903460] [2020-08-22 03:10:21,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:21,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 03:10:21,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613968993] [2020-08-22 03:10:21,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 03:10:21,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:21,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 03:10:21,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 03:10:21,206 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 40 states. [2020-08-22 03:10:21,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:21,460 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-08-22 03:10:21,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-22 03:10:21,461 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-08-22 03:10:21,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:21,462 INFO L225 Difference]: With dead ends: 94 [2020-08-22 03:10:21,463 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 03:10:21,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 03:10:21,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 03:10:21,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-08-22 03:10:21,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 03:10:21,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-08-22 03:10:21,469 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-08-22 03:10:21,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:21,470 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-08-22 03:10:21,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 03:10:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-08-22 03:10:21,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 03:10:21,471 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:21,472 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:21,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 03:10:21,472 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:21,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1537674631, now seen corresponding path program 37 times [2020-08-22 03:10:21,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:21,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468232147] [2020-08-22 03:10:21,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:22,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:22,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468232147] [2020-08-22 03:10:22,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:22,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-22 03:10:22,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999104514] [2020-08-22 03:10:22,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 03:10:22,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:22,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 03:10:22,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 03:10:22,463 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 41 states. [2020-08-22 03:10:22,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:22,714 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-08-22 03:10:22,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 03:10:22,714 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-08-22 03:10:22,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:22,715 INFO L225 Difference]: With dead ends: 96 [2020-08-22 03:10:22,715 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 03:10:22,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 03:10:22,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 03:10:22,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-08-22 03:10:22,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 03:10:22,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-08-22 03:10:22,720 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-08-22 03:10:22,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:22,721 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-08-22 03:10:22,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 03:10:22,721 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-08-22 03:10:22,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-22 03:10:22,722 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:22,722 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:22,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 03:10:22,722 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:22,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:22,723 INFO L82 PathProgramCache]: Analyzing trace with hash -604151127, now seen corresponding path program 38 times [2020-08-22 03:10:22,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:22,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408878690] [2020-08-22 03:10:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:23,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:23,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408878690] [2020-08-22 03:10:23,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:23,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-22 03:10:23,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083337324] [2020-08-22 03:10:23,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 03:10:23,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:23,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 03:10:23,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 03:10:23,692 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 42 states. [2020-08-22 03:10:23,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:23,947 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-08-22 03:10:23,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-22 03:10:23,948 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-08-22 03:10:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:23,949 INFO L225 Difference]: With dead ends: 98 [2020-08-22 03:10:23,949 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 03:10:23,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 03:10:23,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 03:10:23,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-08-22 03:10:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-22 03:10:23,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-08-22 03:10:23,954 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-08-22 03:10:23,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:23,955 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-08-22 03:10:23,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 03:10:23,955 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-08-22 03:10:23,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-22 03:10:23,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:23,956 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:23,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 03:10:23,956 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:23,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:23,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1609369781, now seen corresponding path program 39 times [2020-08-22 03:10:23,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:23,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853539455] [2020-08-22 03:10:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:24,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:24,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853539455] [2020-08-22 03:10:24,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:24,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-22 03:10:24,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758477419] [2020-08-22 03:10:24,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-22 03:10:24,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:24,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-22 03:10:24,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 03:10:24,926 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 43 states. [2020-08-22 03:10:25,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:25,160 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-08-22 03:10:25,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 03:10:25,161 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-08-22 03:10:25,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:25,162 INFO L225 Difference]: With dead ends: 100 [2020-08-22 03:10:25,162 INFO L226 Difference]: Without dead ends: 94 [2020-08-22 03:10:25,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 03:10:25,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-22 03:10:25,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-08-22 03:10:25,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 03:10:25,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-08-22 03:10:25,169 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-08-22 03:10:25,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:25,169 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-08-22 03:10:25,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-22 03:10:25,169 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-08-22 03:10:25,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 03:10:25,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:25,170 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:25,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 03:10:25,170 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:25,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:25,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1256854675, now seen corresponding path program 40 times [2020-08-22 03:10:25,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:25,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487228519] [2020-08-22 03:10:25,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:26,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:26,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487228519] [2020-08-22 03:10:26,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:26,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 03:10:26,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717304101] [2020-08-22 03:10:26,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 03:10:26,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:26,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 03:10:26,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 03:10:26,154 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 44 states. [2020-08-22 03:10:26,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:26,347 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-08-22 03:10:26,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 03:10:26,347 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 92 [2020-08-22 03:10:26,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:26,349 INFO L225 Difference]: With dead ends: 102 [2020-08-22 03:10:26,349 INFO L226 Difference]: Without dead ends: 96 [2020-08-22 03:10:26,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 03:10:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-22 03:10:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-08-22 03:10:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 03:10:26,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-08-22 03:10:26,354 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-08-22 03:10:26,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:26,355 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-08-22 03:10:26,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 03:10:26,355 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-08-22 03:10:26,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-22 03:10:26,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:26,356 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:26,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 03:10:26,356 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:26,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:26,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1792254193, now seen corresponding path program 41 times [2020-08-22 03:10:26,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:26,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501360585] [2020-08-22 03:10:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:27,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:27,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501360585] [2020-08-22 03:10:27,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:27,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-22 03:10:27,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743996537] [2020-08-22 03:10:27,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-22 03:10:27,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:27,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-22 03:10:27,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 03:10:27,449 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 45 states. [2020-08-22 03:10:27,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:27,731 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-08-22 03:10:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-22 03:10:27,731 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 94 [2020-08-22 03:10:27,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:27,733 INFO L225 Difference]: With dead ends: 104 [2020-08-22 03:10:27,733 INFO L226 Difference]: Without dead ends: 98 [2020-08-22 03:10:27,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 03:10:27,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-22 03:10:27,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-08-22 03:10:27,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-22 03:10:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-08-22 03:10:27,739 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-08-22 03:10:27,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:27,739 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-08-22 03:10:27,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-22 03:10:27,739 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-08-22 03:10:27,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 03:10:27,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:27,740 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:27,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 03:10:27,741 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:27,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:27,741 INFO L82 PathProgramCache]: Analyzing trace with hash -915115471, now seen corresponding path program 42 times [2020-08-22 03:10:27,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:27,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287072779] [2020-08-22 03:10:27,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:28,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:28,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287072779] [2020-08-22 03:10:28,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:28,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-22 03:10:28,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14732155] [2020-08-22 03:10:28,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 03:10:28,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:28,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 03:10:28,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 03:10:28,833 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 46 states. [2020-08-22 03:10:29,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:29,013 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-08-22 03:10:29,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-22 03:10:29,014 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 96 [2020-08-22 03:10:29,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:29,015 INFO L225 Difference]: With dead ends: 106 [2020-08-22 03:10:29,015 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 03:10:29,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 03:10:29,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 03:10:29,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-08-22 03:10:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 03:10:29,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-08-22 03:10:29,019 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-08-22 03:10:29,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:29,019 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-08-22 03:10:29,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 03:10:29,020 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-08-22 03:10:29,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 03:10:29,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:29,020 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:29,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 03:10:29,020 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:29,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:29,021 INFO L82 PathProgramCache]: Analyzing trace with hash 201606355, now seen corresponding path program 43 times [2020-08-22 03:10:29,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:29,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077812338] [2020-08-22 03:10:29,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:30,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:30,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077812338] [2020-08-22 03:10:30,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:30,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-08-22 03:10:30,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591641338] [2020-08-22 03:10:30,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-22 03:10:30,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:30,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-22 03:10:30,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 03:10:30,116 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 47 states. [2020-08-22 03:10:30,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:30,406 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-08-22 03:10:30,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 03:10:30,407 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 98 [2020-08-22 03:10:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:30,408 INFO L225 Difference]: With dead ends: 108 [2020-08-22 03:10:30,408 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 03:10:30,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 03:10:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 03:10:30,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-08-22 03:10:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 03:10:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-08-22 03:10:30,413 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-08-22 03:10:30,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:30,414 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-08-22 03:10:30,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-22 03:10:30,414 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-08-22 03:10:30,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 03:10:30,414 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:30,415 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:30,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 03:10:30,415 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:30,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:30,415 INFO L82 PathProgramCache]: Analyzing trace with hash -370542859, now seen corresponding path program 44 times [2020-08-22 03:10:30,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:30,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761060214] [2020-08-22 03:10:30,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:31,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:31,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761060214] [2020-08-22 03:10:31,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:31,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-22 03:10:31,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362718289] [2020-08-22 03:10:31,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 03:10:31,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:31,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 03:10:31,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 03:10:31,585 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 48 states. [2020-08-22 03:10:31,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:31,821 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-08-22 03:10:31,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-22 03:10:31,821 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 100 [2020-08-22 03:10:31,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:31,823 INFO L225 Difference]: With dead ends: 110 [2020-08-22 03:10:31,823 INFO L226 Difference]: Without dead ends: 104 [2020-08-22 03:10:31,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 03:10:31,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-22 03:10:31,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-08-22 03:10:31,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-22 03:10:31,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-08-22 03:10:31,828 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-08-22 03:10:31,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:31,829 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-08-22 03:10:31,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 03:10:31,829 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-08-22 03:10:31,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-08-22 03:10:31,829 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:31,830 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:31,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 03:10:31,830 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:31,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:31,830 INFO L82 PathProgramCache]: Analyzing trace with hash -450123625, now seen corresponding path program 45 times [2020-08-22 03:10:31,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:31,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891158446] [2020-08-22 03:10:31,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:33,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:33,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891158446] [2020-08-22 03:10:33,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:33,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-22 03:10:33,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051987780] [2020-08-22 03:10:33,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-22 03:10:33,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:33,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-22 03:10:33,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 03:10:33,071 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 49 states. [2020-08-22 03:10:33,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:33,281 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-08-22 03:10:33,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-22 03:10:33,281 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 102 [2020-08-22 03:10:33,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:33,282 INFO L225 Difference]: With dead ends: 112 [2020-08-22 03:10:33,283 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 03:10:33,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 03:10:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 03:10:33,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-08-22 03:10:33,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 03:10:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-08-22 03:10:33,287 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-08-22 03:10:33,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:33,288 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-08-22 03:10:33,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-22 03:10:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-08-22 03:10:33,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-22 03:10:33,289 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:33,289 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:33,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 03:10:33,289 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:33,290 INFO L82 PathProgramCache]: Analyzing trace with hash 382171577, now seen corresponding path program 46 times [2020-08-22 03:10:33,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:33,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753838598] [2020-08-22 03:10:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:34,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:34,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753838598] [2020-08-22 03:10:34,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:34,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-22 03:10:34,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319925763] [2020-08-22 03:10:34,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-22 03:10:34,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:34,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-22 03:10:34,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 03:10:34,629 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 50 states. [2020-08-22 03:10:34,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:34,798 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-08-22 03:10:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-08-22 03:10:34,799 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 104 [2020-08-22 03:10:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:34,801 INFO L225 Difference]: With dead ends: 114 [2020-08-22 03:10:34,801 INFO L226 Difference]: Without dead ends: 108 [2020-08-22 03:10:34,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 03:10:34,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-08-22 03:10:34,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-08-22 03:10:34,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 03:10:34,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-08-22 03:10:34,806 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-08-22 03:10:34,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:34,806 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-08-22 03:10:34,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-22 03:10:34,807 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-08-22 03:10:34,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 03:10:34,807 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:34,807 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:34,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 03:10:34,808 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:34,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:34,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1353943643, now seen corresponding path program 47 times [2020-08-22 03:10:34,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:34,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230930424] [2020-08-22 03:10:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:36,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:36,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230930424] [2020-08-22 03:10:36,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:36,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-08-22 03:10:36,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901902591] [2020-08-22 03:10:36,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-22 03:10:36,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:36,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-22 03:10:36,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 03:10:36,173 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 51 states. [2020-08-22 03:10:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:36,413 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-08-22 03:10:36,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-22 03:10:36,414 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 106 [2020-08-22 03:10:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:36,415 INFO L225 Difference]: With dead ends: 116 [2020-08-22 03:10:36,415 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 03:10:36,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 03:10:36,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 03:10:36,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-08-22 03:10:36,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-22 03:10:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-08-22 03:10:36,419 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-08-22 03:10:36,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:36,420 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-08-22 03:10:36,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-22 03:10:36,420 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-08-22 03:10:36,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-22 03:10:36,421 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:36,421 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:36,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 03:10:36,421 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:36,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:36,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1075971459, now seen corresponding path program 48 times [2020-08-22 03:10:36,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:36,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359990208] [2020-08-22 03:10:36,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:37,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:37,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359990208] [2020-08-22 03:10:37,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:37,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-08-22 03:10:37,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84445196] [2020-08-22 03:10:37,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-22 03:10:37,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:37,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-22 03:10:37,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 03:10:37,926 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 52 states. [2020-08-22 03:10:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:38,149 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-08-22 03:10:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-08-22 03:10:38,152 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 108 [2020-08-22 03:10:38,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:38,153 INFO L225 Difference]: With dead ends: 118 [2020-08-22 03:10:38,153 INFO L226 Difference]: Without dead ends: 112 [2020-08-22 03:10:38,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 03:10:38,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-22 03:10:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-08-22 03:10:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-22 03:10:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-08-22 03:10:38,158 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-08-22 03:10:38,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:38,158 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-08-22 03:10:38,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-08-22 03:10:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-08-22 03:10:38,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-22 03:10:38,159 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:38,159 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:38,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 03:10:38,160 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:38,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:38,160 INFO L82 PathProgramCache]: Analyzing trace with hash 237824543, now seen corresponding path program 49 times [2020-08-22 03:10:38,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:38,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958815599] [2020-08-22 03:10:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:39,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:39,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958815599] [2020-08-22 03:10:39,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:39,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-22 03:10:39,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898043982] [2020-08-22 03:10:39,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-22 03:10:39,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:39,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-22 03:10:39,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 03:10:39,660 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 53 states. [2020-08-22 03:10:39,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:39,928 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-08-22 03:10:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-22 03:10:39,929 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 110 [2020-08-22 03:10:39,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:39,931 INFO L225 Difference]: With dead ends: 120 [2020-08-22 03:10:39,931 INFO L226 Difference]: Without dead ends: 114 [2020-08-22 03:10:39,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 03:10:39,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-22 03:10:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-08-22 03:10:39,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 03:10:39,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-08-22 03:10:39,935 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-08-22 03:10:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:39,936 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-08-22 03:10:39,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-22 03:10:39,936 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-08-22 03:10:39,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-22 03:10:39,937 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:39,937 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:39,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 03:10:39,937 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:39,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:39,938 INFO L82 PathProgramCache]: Analyzing trace with hash 75397441, now seen corresponding path program 50 times [2020-08-22 03:10:39,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:39,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122752603] [2020-08-22 03:10:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:41,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:41,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122752603] [2020-08-22 03:10:41,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:41,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-08-22 03:10:41,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001039389] [2020-08-22 03:10:41,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-08-22 03:10:41,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:41,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-08-22 03:10:41,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 03:10:41,519 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 54 states. [2020-08-22 03:10:41,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:41,868 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-08-22 03:10:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-08-22 03:10:41,869 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 112 [2020-08-22 03:10:41,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:41,870 INFO L225 Difference]: With dead ends: 122 [2020-08-22 03:10:41,870 INFO L226 Difference]: Without dead ends: 116 [2020-08-22 03:10:41,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 03:10:41,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-22 03:10:41,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-08-22 03:10:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-08-22 03:10:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-08-22 03:10:41,876 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2020-08-22 03:10:41,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:41,876 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-08-22 03:10:41,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-08-22 03:10:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-08-22 03:10:41,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-08-22 03:10:41,877 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:41,877 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:41,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 03:10:41,877 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:41,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:41,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1398224925, now seen corresponding path program 51 times [2020-08-22 03:10:41,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:41,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841891586] [2020-08-22 03:10:41,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:43,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:43,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841891586] [2020-08-22 03:10:43,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:43,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-22 03:10:43,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335352583] [2020-08-22 03:10:43,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-22 03:10:43,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:43,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-22 03:10:43,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 03:10:43,506 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 55 states. [2020-08-22 03:10:43,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:43,848 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-08-22 03:10:43,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-22 03:10:43,849 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 114 [2020-08-22 03:10:43,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:43,850 INFO L225 Difference]: With dead ends: 124 [2020-08-22 03:10:43,851 INFO L226 Difference]: Without dead ends: 118 [2020-08-22 03:10:43,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 03:10:43,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-22 03:10:43,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-08-22 03:10:43,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-22 03:10:43,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-08-22 03:10:43,856 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2020-08-22 03:10:43,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:43,857 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-08-22 03:10:43,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-22 03:10:43,857 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-08-22 03:10:43,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 03:10:43,858 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:43,858 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:43,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 03:10:43,858 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:43,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:43,858 INFO L82 PathProgramCache]: Analyzing trace with hash -210110971, now seen corresponding path program 52 times [2020-08-22 03:10:43,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:43,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217231115] [2020-08-22 03:10:43,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:45,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:45,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217231115] [2020-08-22 03:10:45,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:45,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-08-22 03:10:45,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125315840] [2020-08-22 03:10:45,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-08-22 03:10:45,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:45,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-08-22 03:10:45,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 03:10:45,526 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 56 states. [2020-08-22 03:10:45,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:45,910 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-08-22 03:10:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-08-22 03:10:45,911 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 116 [2020-08-22 03:10:45,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:45,913 INFO L225 Difference]: With dead ends: 126 [2020-08-22 03:10:45,913 INFO L226 Difference]: Without dead ends: 120 [2020-08-22 03:10:45,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 03:10:45,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-08-22 03:10:45,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-08-22 03:10:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-22 03:10:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2020-08-22 03:10:45,918 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2020-08-22 03:10:45,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:45,918 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2020-08-22 03:10:45,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-08-22 03:10:45,918 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2020-08-22 03:10:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 03:10:45,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:45,919 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:45,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 03:10:45,919 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:45,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:45,920 INFO L82 PathProgramCache]: Analyzing trace with hash -893901913, now seen corresponding path program 53 times [2020-08-22 03:10:45,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:45,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070844839] [2020-08-22 03:10:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:47,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:47,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070844839] [2020-08-22 03:10:47,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:47,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-08-22 03:10:47,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268288480] [2020-08-22 03:10:47,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-08-22 03:10:47,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:47,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-08-22 03:10:47,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 03:10:47,677 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 57 states. [2020-08-22 03:10:47,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:47,973 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-08-22 03:10:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-08-22 03:10:47,974 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 118 [2020-08-22 03:10:47,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:47,975 INFO L225 Difference]: With dead ends: 128 [2020-08-22 03:10:47,975 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 03:10:47,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 03:10:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 03:10:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-08-22 03:10:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-08-22 03:10:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-08-22 03:10:47,980 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2020-08-22 03:10:47,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:47,980 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-08-22 03:10:47,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-08-22 03:10:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-08-22 03:10:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-08-22 03:10:47,981 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:47,981 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:47,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 03:10:47,982 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:47,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:47,982 INFO L82 PathProgramCache]: Analyzing trace with hash -887000887, now seen corresponding path program 54 times [2020-08-22 03:10:47,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:47,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916562776] [2020-08-22 03:10:47,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:49,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:49,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916562776] [2020-08-22 03:10:49,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:49,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-08-22 03:10:49,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316608030] [2020-08-22 03:10:49,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-08-22 03:10:49,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:49,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-08-22 03:10:49,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-08-22 03:10:49,729 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 58 states. [2020-08-22 03:10:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:50,081 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-08-22 03:10:50,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-08-22 03:10:50,081 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 120 [2020-08-22 03:10:50,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:50,083 INFO L225 Difference]: With dead ends: 130 [2020-08-22 03:10:50,083 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 03:10:50,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-08-22 03:10:50,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 03:10:50,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-08-22 03:10:50,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-22 03:10:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-08-22 03:10:50,087 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2020-08-22 03:10:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:50,087 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-08-22 03:10:50,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-08-22 03:10:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-08-22 03:10:50,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-22 03:10:50,088 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:50,088 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:50,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 03:10:50,089 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:50,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:50,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1449917803, now seen corresponding path program 55 times [2020-08-22 03:10:50,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:50,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449693547] [2020-08-22 03:10:50,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:51,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:51,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449693547] [2020-08-22 03:10:51,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:51,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-08-22 03:10:51,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117701464] [2020-08-22 03:10:51,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-08-22 03:10:51,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:51,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-08-22 03:10:51,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 03:10:51,969 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 59 states. [2020-08-22 03:10:52,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:52,215 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-08-22 03:10:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-08-22 03:10:52,216 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 122 [2020-08-22 03:10:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:52,217 INFO L225 Difference]: With dead ends: 132 [2020-08-22 03:10:52,217 INFO L226 Difference]: Without dead ends: 126 [2020-08-22 03:10:52,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 03:10:52,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-22 03:10:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-08-22 03:10:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-22 03:10:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-08-22 03:10:52,223 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2020-08-22 03:10:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:52,223 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-08-22 03:10:52,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-08-22 03:10:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-08-22 03:10:52,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 03:10:52,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:52,226 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:52,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 03:10:52,228 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:52,229 INFO L82 PathProgramCache]: Analyzing trace with hash 960883085, now seen corresponding path program 56 times [2020-08-22 03:10:52,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:52,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333392491] [2020-08-22 03:10:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:54,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:54,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333392491] [2020-08-22 03:10:54,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:54,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-08-22 03:10:54,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842032265] [2020-08-22 03:10:54,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-08-22 03:10:54,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:54,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-08-22 03:10:54,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 03:10:54,169 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 60 states. [2020-08-22 03:10:54,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:54,599 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-08-22 03:10:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-08-22 03:10:54,600 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 124 [2020-08-22 03:10:54,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:54,601 INFO L225 Difference]: With dead ends: 134 [2020-08-22 03:10:54,601 INFO L226 Difference]: Without dead ends: 128 [2020-08-22 03:10:54,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 03:10:54,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-08-22 03:10:54,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-08-22 03:10:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-22 03:10:54,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-08-22 03:10:54,605 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2020-08-22 03:10:54,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:54,606 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-08-22 03:10:54,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-08-22 03:10:54,606 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-08-22 03:10:54,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 03:10:54,607 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:54,607 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:54,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 03:10:54,607 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:54,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:54,608 INFO L82 PathProgramCache]: Analyzing trace with hash -850045649, now seen corresponding path program 57 times [2020-08-22 03:10:54,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:54,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437533149] [2020-08-22 03:10:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:56,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:10:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:10:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:10:56,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437533149] [2020-08-22 03:10:56,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:10:56,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-08-22 03:10:56,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890806859] [2020-08-22 03:10:56,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-08-22 03:10:56,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:10:56,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-08-22 03:10:56,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 03:10:56,601 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 61 states. [2020-08-22 03:10:56,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:10:56,854 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-08-22 03:10:56,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-08-22 03:10:56,855 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 126 [2020-08-22 03:10:56,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:10:56,856 INFO L225 Difference]: With dead ends: 136 [2020-08-22 03:10:56,856 INFO L226 Difference]: Without dead ends: 130 [2020-08-22 03:10:56,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 03:10:56,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-22 03:10:56,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-08-22 03:10:56,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-08-22 03:10:56,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2020-08-22 03:10:56,862 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2020-08-22 03:10:56,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:10:56,863 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2020-08-22 03:10:56,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-08-22 03:10:56,863 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2020-08-22 03:10:56,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 03:10:56,864 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:10:56,864 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:10:56,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 03:10:56,864 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:10:56,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:10:56,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1690804143, now seen corresponding path program 58 times [2020-08-22 03:10:56,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:10:56,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182786771] [2020-08-22 03:10:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:10:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat