/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:54:21,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:54:21,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:54:21,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:54:21,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:54:21,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:54:21,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:54:21,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:54:21,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:54:21,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:54:21,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:54:21,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:54:21,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:54:21,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:54:21,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:54:21,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:54:21,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:54:21,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:54:21,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:54:21,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:54:21,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:54:21,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:54:21,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:54:21,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:54:21,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 14:54:21,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:54:21,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:54:21,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:54:21,885 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 [2020-09-24 14:54:21,933 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:54:21,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:54:21,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:54:21,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:54:21,936 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:54:21,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:54:21,937 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:54:21,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:54:21,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:54:21,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:54:21,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:54:21,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:54:21,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:54:21,939 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:54:21,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:54:21,940 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:54:21,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:54:21,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:54:21,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:54:21,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:54:21,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:54:21,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:54:21,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:54:21,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:54:21,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:54:21,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:54:21,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:54:21,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:54:21,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:54:21,942 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:54:22,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:54:22,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:54:22,537 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:54:22,541 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:54:22,541 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:54:22,542 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-09-24 14:54:22,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0c16420c/d6e1c58af3f14dda8a73b99733e33a87/FLAGbaca6ffbf [2020-09-24 14:54:23,134 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:54:23,135 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-09-24 14:54:23,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0c16420c/d6e1c58af3f14dda8a73b99733e33a87/FLAGbaca6ffbf [2020-09-24 14:54:23,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0c16420c/d6e1c58af3f14dda8a73b99733e33a87 [2020-09-24 14:54:23,496 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:54:23,503 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:54:23,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:23,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:54:23,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:54:23,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:23" (1/1) ... [2020-09-24 14:54:23,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@843e52e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:23, skipping insertion in model container [2020-09-24 14:54:23,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:23" (1/1) ... [2020-09-24 14:54:23,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:54:23,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:54:23,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:23,934 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:54:24,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:24,077 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:54:24,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24 WrapperNode [2020-09-24 14:54:24,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:24,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:54:24,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:54:24,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:54:24,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:54:24,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:54:24,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:54:24,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:54:24,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (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 [2020-09-24 14:54:24,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:54:24,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:54:24,210 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 14:54:24,210 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-09-24 14:54:24,210 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-09-24 14:54:24,210 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-09-24 14:54:24,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:54:24,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:54:24,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 14:54:24,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 14:54:24,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 14:54:24,212 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-09-24 14:54:24,212 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-09-24 14:54:24,212 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-09-24 14:54:24,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:54:24,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:54:24,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:54:24,796 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:54:24,797 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 14:54:24,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:24 BoogieIcfgContainer [2020-09-24 14:54:24,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:54:24,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:54:24,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:54:24,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:54:24,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:54:23" (1/3) ... [2020-09-24 14:54:24,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100f6abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:24, skipping insertion in model container [2020-09-24 14:54:24,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (2/3) ... [2020-09-24 14:54:24,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100f6abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:24, skipping insertion in model container [2020-09-24 14:54:24,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:24" (3/3) ... [2020-09-24 14:54:24,814 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-09-24 14:54:24,827 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:54:24,837 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:54:24,860 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:54:24,891 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:54:24,891 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:54:24,891 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:54:24,891 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:54:24,891 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:54:24,891 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:54:24,891 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:54:24,892 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:54:24,917 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-09-24 14:54:24,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-24 14:54:24,930 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:24,931 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:24,932 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:24,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:24,938 INFO L82 PathProgramCache]: Analyzing trace with hash -2062280112, now seen corresponding path program 1 times [2020-09-24 14:54:24,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:24,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366723444] [2020-09-24 14:54:24,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 14:54:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 14:54:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-09-24 14:54:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:25,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366723444] [2020-09-24 14:54:25,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:25,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 14:54:25,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688807721] [2020-09-24 14:54:25,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:54:25,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:25,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:54:25,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:54:25,374 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 4 states. [2020-09-24 14:54:25,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:25,540 INFO L93 Difference]: Finished difference Result 286 states and 363 transitions. [2020-09-24 14:54:25,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:54:25,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-09-24 14:54:25,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:25,562 INFO L225 Difference]: With dead ends: 286 [2020-09-24 14:54:25,563 INFO L226 Difference]: Without dead ends: 168 [2020-09-24 14:54:25,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:54:25,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-24 14:54:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 145. [2020-09-24 14:54:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-24 14:54:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 169 transitions. [2020-09-24 14:54:25,651 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 169 transitions. Word has length 100 [2020-09-24 14:54:25,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:25,652 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 169 transitions. [2020-09-24 14:54:25,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:54:25,652 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 169 transitions. [2020-09-24 14:54:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-24 14:54:25,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:25,659 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:25,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:54:25,660 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:25,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1947593625, now seen corresponding path program 1 times [2020-09-24 14:54:25,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:25,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340748728] [2020-09-24 14:54:25,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 14:54:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 14:54:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-24 14:54:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:25,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340748728] [2020-09-24 14:54:25,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:25,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 14:54:25,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311070609] [2020-09-24 14:54:25,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:54:25,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:25,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:54:25,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:54:25,867 INFO L87 Difference]: Start difference. First operand 145 states and 169 transitions. Second operand 4 states. [2020-09-24 14:54:25,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:25,961 INFO L93 Difference]: Finished difference Result 278 states and 331 transitions. [2020-09-24 14:54:25,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 14:54:25,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-09-24 14:54:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:25,965 INFO L225 Difference]: With dead ends: 278 [2020-09-24 14:54:25,965 INFO L226 Difference]: Without dead ends: 169 [2020-09-24 14:54:25,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:54:25,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-24 14:54:25,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 157. [2020-09-24 14:54:25,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-24 14:54:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 185 transitions. [2020-09-24 14:54:25,988 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 185 transitions. Word has length 103 [2020-09-24 14:54:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:25,989 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 185 transitions. [2020-09-24 14:54:25,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:54:25,989 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 185 transitions. [2020-09-24 14:54:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-24 14:54:25,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:25,995 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:25,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:54:25,995 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:25,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:25,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1622356113, now seen corresponding path program 1 times [2020-09-24 14:54:25,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:25,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394393447] [2020-09-24 14:54:25,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 14:54:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-24 14:54:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-09-24 14:54:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:26,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394393447] [2020-09-24 14:54:26,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:26,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 14:54:26,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26932425] [2020-09-24 14:54:26,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 14:54:26,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:26,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 14:54:26,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:54:26,196 INFO L87 Difference]: Start difference. First operand 157 states and 185 transitions. Second operand 5 states. [2020-09-24 14:54:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:26,286 INFO L93 Difference]: Finished difference Result 314 states and 375 transitions. [2020-09-24 14:54:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 14:54:26,286 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-09-24 14:54:26,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:26,289 INFO L225 Difference]: With dead ends: 314 [2020-09-24 14:54:26,290 INFO L226 Difference]: Without dead ends: 192 [2020-09-24 14:54:26,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:54:26,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-24 14:54:26,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 173. [2020-09-24 14:54:26,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-09-24 14:54:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2020-09-24 14:54:26,312 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 108 [2020-09-24 14:54:26,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:26,312 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2020-09-24 14:54:26,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 14:54:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2020-09-24 14:54:26,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-24 14:54:26,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:26,315 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:26,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:54:26,316 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:26,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1409900093, now seen corresponding path program 1 times [2020-09-24 14:54:26,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:26,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182418436] [2020-09-24 14:54:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 14:54:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-24 14:54:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-09-24 14:54:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:26,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182418436] [2020-09-24 14:54:26,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:26,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 14:54:26,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081943707] [2020-09-24 14:54:26,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 14:54:26,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:26,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 14:54:26,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:54:26,493 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand 5 states. [2020-09-24 14:54:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:26,599 INFO L93 Difference]: Finished difference Result 314 states and 375 transitions. [2020-09-24 14:54:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 14:54:26,600 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-09-24 14:54:26,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:26,602 INFO L225 Difference]: With dead ends: 314 [2020-09-24 14:54:26,603 INFO L226 Difference]: Without dead ends: 194 [2020-09-24 14:54:26,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:54:26,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-24 14:54:26,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 176. [2020-09-24 14:54:26,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-24 14:54:26,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 207 transitions. [2020-09-24 14:54:26,624 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 207 transitions. Word has length 108 [2020-09-24 14:54:26,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:26,624 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 207 transitions. [2020-09-24 14:54:26,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 14:54:26,625 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 207 transitions. [2020-09-24 14:54:26,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-09-24 14:54:26,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:26,627 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:26,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:54:26,628 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:26,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2129807001, now seen corresponding path program 2 times [2020-09-24 14:54:26,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:26,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477341966] [2020-09-24 14:54:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 14:54:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-24 14:54:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 14:54:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:26,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477341966] [2020-09-24 14:54:26,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:26,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 14:54:26,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359081034] [2020-09-24 14:54:26,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 14:54:26,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:26,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 14:54:26,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:54:26,841 INFO L87 Difference]: Start difference. First operand 176 states and 207 transitions. Second operand 6 states. [2020-09-24 14:54:26,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:26,956 INFO L93 Difference]: Finished difference Result 348 states and 416 transitions. [2020-09-24 14:54:26,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 14:54:26,957 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-09-24 14:54:26,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:26,959 INFO L225 Difference]: With dead ends: 348 [2020-09-24 14:54:26,959 INFO L226 Difference]: Without dead ends: 218 [2020-09-24 14:54:26,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:54:26,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-24 14:54:26,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 186. [2020-09-24 14:54:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-24 14:54:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2020-09-24 14:54:26,976 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 113 [2020-09-24 14:54:26,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:26,977 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2020-09-24 14:54:26,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 14:54:26,978 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2020-09-24 14:54:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-09-24 14:54:26,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:26,980 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:26,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 14:54:26,981 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:26,981 INFO L82 PathProgramCache]: Analyzing trace with hash -902449205, now seen corresponding path program 1 times [2020-09-24 14:54:26,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:26,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634209709] [2020-09-24 14:54:26,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 14:54:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-24 14:54:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 14:54:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:27,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634209709] [2020-09-24 14:54:27,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:27,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 14:54:27,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689147587] [2020-09-24 14:54:27,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 14:54:27,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:27,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 14:54:27,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:54:27,152 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand 6 states. [2020-09-24 14:54:27,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:27,264 INFO L93 Difference]: Finished difference Result 342 states and 410 transitions. [2020-09-24 14:54:27,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 14:54:27,265 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-09-24 14:54:27,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:27,267 INFO L225 Difference]: With dead ends: 342 [2020-09-24 14:54:27,268 INFO L226 Difference]: Without dead ends: 214 [2020-09-24 14:54:27,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:54:27,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-24 14:54:27,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 186. [2020-09-24 14:54:27,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-24 14:54:27,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2020-09-24 14:54:27,282 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 113 [2020-09-24 14:54:27,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:27,283 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2020-09-24 14:54:27,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 14:54:27,283 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2020-09-24 14:54:27,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-24 14:54:27,285 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:27,285 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:27,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 14:54:27,286 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:27,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:27,286 INFO L82 PathProgramCache]: Analyzing trace with hash 139965841, now seen corresponding path program 3 times [2020-09-24 14:54:27,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:27,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299411586] [2020-09-24 14:54:27,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-24 14:54:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-24 14:54:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-24 14:54:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:27,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299411586] [2020-09-24 14:54:27,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:27,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 14:54:27,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806166619] [2020-09-24 14:54:27,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:54:27,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:27,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:54:27,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:54:27,443 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand 7 states. [2020-09-24 14:54:27,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:27,569 INFO L93 Difference]: Finished difference Result 375 states and 449 transitions. [2020-09-24 14:54:27,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 14:54:27,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2020-09-24 14:54:27,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:27,573 INFO L225 Difference]: With dead ends: 375 [2020-09-24 14:54:27,573 INFO L226 Difference]: Without dead ends: 240 [2020-09-24 14:54:27,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:54:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-24 14:54:27,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 196. [2020-09-24 14:54:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-09-24 14:54:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 233 transitions. [2020-09-24 14:54:27,587 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 233 transitions. Word has length 118 [2020-09-24 14:54:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:27,588 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 233 transitions. [2020-09-24 14:54:27,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:54:27,588 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 233 transitions. [2020-09-24 14:54:27,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-24 14:54:27,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:27,590 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:27,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 14:54:27,590 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:27,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:27,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1402676931, now seen corresponding path program 2 times [2020-09-24 14:54:27,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:27,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10634809] [2020-09-24 14:54:27,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-24 14:54:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-24 14:54:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-24 14:54:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:27,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10634809] [2020-09-24 14:54:27,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:27,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 14:54:27,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993976911] [2020-09-24 14:54:27,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:54:27,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:27,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:54:27,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:54:27,774 INFO L87 Difference]: Start difference. First operand 196 states and 233 transitions. Second operand 7 states. [2020-09-24 14:54:27,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:27,917 INFO L93 Difference]: Finished difference Result 361 states and 435 transitions. [2020-09-24 14:54:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 14:54:27,918 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2020-09-24 14:54:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:27,920 INFO L225 Difference]: With dead ends: 361 [2020-09-24 14:54:27,920 INFO L226 Difference]: Without dead ends: 228 [2020-09-24 14:54:27,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:54:27,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-24 14:54:27,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 196. [2020-09-24 14:54:27,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-09-24 14:54:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 233 transitions. [2020-09-24 14:54:27,935 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 233 transitions. Word has length 118 [2020-09-24 14:54:27,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:27,935 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 233 transitions. [2020-09-24 14:54:27,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:54:27,936 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 233 transitions. [2020-09-24 14:54:27,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-09-24 14:54:27,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:27,938 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:27,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 14:54:27,939 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:27,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:27,939 INFO L82 PathProgramCache]: Analyzing trace with hash -229056103, now seen corresponding path program 4 times [2020-09-24 14:54:27,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:27,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845013677] [2020-09-24 14:54:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-24 14:54:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-24 14:54:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 14:54:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:28,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845013677] [2020-09-24 14:54:28,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:28,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 14:54:28,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448730629] [2020-09-24 14:54:28,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 14:54:28,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:28,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 14:54:28,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:54:28,097 INFO L87 Difference]: Start difference. First operand 196 states and 233 transitions. Second operand 8 states. [2020-09-24 14:54:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:28,229 INFO L93 Difference]: Finished difference Result 402 states and 482 transitions. [2020-09-24 14:54:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 14:54:28,229 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2020-09-24 14:54:28,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:28,232 INFO L225 Difference]: With dead ends: 402 [2020-09-24 14:54:28,232 INFO L226 Difference]: Without dead ends: 262 [2020-09-24 14:54:28,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:54:28,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-24 14:54:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 206. [2020-09-24 14:54:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-09-24 14:54:28,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 246 transitions. [2020-09-24 14:54:28,248 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 246 transitions. Word has length 123 [2020-09-24 14:54:28,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:28,248 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 246 transitions. [2020-09-24 14:54:28,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 14:54:28,248 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 246 transitions. [2020-09-24 14:54:28,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-09-24 14:54:28,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:28,251 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:28,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 14:54:28,251 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:28,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:28,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1033654987, now seen corresponding path program 3 times [2020-09-24 14:54:28,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:28,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968182397] [2020-09-24 14:54:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:28,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-24 14:54:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-24 14:54:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 14:54:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:28,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968182397] [2020-09-24 14:54:28,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:28,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 14:54:28,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815272047] [2020-09-24 14:54:28,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 14:54:28,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:28,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 14:54:28,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:54:28,455 INFO L87 Difference]: Start difference. First operand 206 states and 246 transitions. Second operand 8 states. [2020-09-24 14:54:28,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:28,633 INFO L93 Difference]: Finished difference Result 380 states and 460 transitions. [2020-09-24 14:54:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 14:54:28,633 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2020-09-24 14:54:28,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:28,636 INFO L225 Difference]: With dead ends: 380 [2020-09-24 14:54:28,636 INFO L226 Difference]: Without dead ends: 242 [2020-09-24 14:54:28,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:54:28,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-09-24 14:54:28,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2020-09-24 14:54:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-09-24 14:54:28,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 246 transitions. [2020-09-24 14:54:28,652 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 246 transitions. Word has length 123 [2020-09-24 14:54:28,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:28,652 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 246 transitions. [2020-09-24 14:54:28,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 14:54:28,653 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 246 transitions. [2020-09-24 14:54:28,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-24 14:54:28,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:28,655 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:28,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 14:54:28,655 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:28,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:28,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1138358929, now seen corresponding path program 5 times [2020-09-24 14:54:28,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:28,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410228664] [2020-09-24 14:54:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-24 14:54:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 14:54:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-09-24 14:54:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 72 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:28,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410228664] [2020-09-24 14:54:28,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:28,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 14:54:28,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39779423] [2020-09-24 14:54:28,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 14:54:28,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:28,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 14:54:28,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:54:28,832 INFO L87 Difference]: Start difference. First operand 206 states and 246 transitions. Second operand 9 states. [2020-09-24 14:54:28,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:28,992 INFO L93 Difference]: Finished difference Result 429 states and 515 transitions. [2020-09-24 14:54:28,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 14:54:28,993 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-09-24 14:54:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:28,995 INFO L225 Difference]: With dead ends: 429 [2020-09-24 14:54:28,996 INFO L226 Difference]: Without dead ends: 284 [2020-09-24 14:54:28,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:54:28,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-24 14:54:29,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 216. [2020-09-24 14:54:29,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-09-24 14:54:29,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 259 transitions. [2020-09-24 14:54:29,012 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 259 transitions. Word has length 128 [2020-09-24 14:54:29,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:29,023 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 259 transitions. [2020-09-24 14:54:29,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 14:54:29,024 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 259 transitions. [2020-09-24 14:54:29,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-24 14:54:29,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:29,026 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:29,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 14:54:29,026 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:29,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:29,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1893897277, now seen corresponding path program 4 times [2020-09-24 14:54:29,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:29,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649489505] [2020-09-24 14:54:29,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-24 14:54:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 14:54:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-09-24 14:54:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:29,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649489505] [2020-09-24 14:54:29,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:29,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 14:54:29,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922602924] [2020-09-24 14:54:29,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 14:54:29,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:29,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 14:54:29,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:54:29,240 INFO L87 Difference]: Start difference. First operand 216 states and 259 transitions. Second operand 9 states. [2020-09-24 14:54:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:29,414 INFO L93 Difference]: Finished difference Result 399 states and 485 transitions. [2020-09-24 14:54:29,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 14:54:29,415 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-09-24 14:54:29,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:29,417 INFO L225 Difference]: With dead ends: 399 [2020-09-24 14:54:29,417 INFO L226 Difference]: Without dead ends: 256 [2020-09-24 14:54:29,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:54:29,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-09-24 14:54:29,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 216. [2020-09-24 14:54:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-09-24 14:54:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 259 transitions. [2020-09-24 14:54:29,434 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 259 transitions. Word has length 128 [2020-09-24 14:54:29,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:29,435 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 259 transitions. [2020-09-24 14:54:29,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 14:54:29,435 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 259 transitions. [2020-09-24 14:54:29,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-24 14:54:29,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:29,437 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:29,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 14:54:29,438 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:29,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1450818713, now seen corresponding path program 6 times [2020-09-24 14:54:29,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:29,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55982136] [2020-09-24 14:54:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:54:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-24 14:54:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-24 14:54:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 6 proven. 99 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:29,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55982136] [2020-09-24 14:54:29,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:29,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 14:54:29,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860003961] [2020-09-24 14:54:29,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 14:54:29,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:29,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 14:54:29,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:54:29,654 INFO L87 Difference]: Start difference. First operand 216 states and 259 transitions. Second operand 10 states. [2020-09-24 14:54:29,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:29,785 INFO L93 Difference]: Finished difference Result 456 states and 548 transitions. [2020-09-24 14:54:29,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 14:54:29,786 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-09-24 14:54:29,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:29,789 INFO L225 Difference]: With dead ends: 456 [2020-09-24 14:54:29,789 INFO L226 Difference]: Without dead ends: 306 [2020-09-24 14:54:29,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:54:29,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-09-24 14:54:29,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 226. [2020-09-24 14:54:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-09-24 14:54:29,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 272 transitions. [2020-09-24 14:54:29,805 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 272 transitions. Word has length 133 [2020-09-24 14:54:29,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:29,805 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 272 transitions. [2020-09-24 14:54:29,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 14:54:29,806 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 272 transitions. [2020-09-24 14:54:29,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-24 14:54:29,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:29,808 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:29,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 14:54:29,808 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:29,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:29,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1581437493, now seen corresponding path program 5 times [2020-09-24 14:54:29,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:29,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814568893] [2020-09-24 14:54:29,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:54:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-24 14:54:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-24 14:54:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 7 proven. 89 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:30,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814568893] [2020-09-24 14:54:30,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:30,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 14:54:30,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553870328] [2020-09-24 14:54:30,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 14:54:30,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:30,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 14:54:30,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:54:30,098 INFO L87 Difference]: Start difference. First operand 226 states and 272 transitions. Second operand 10 states. [2020-09-24 14:54:30,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:30,362 INFO L93 Difference]: Finished difference Result 418 states and 510 transitions. [2020-09-24 14:54:30,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 14:54:30,363 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-09-24 14:54:30,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:30,366 INFO L225 Difference]: With dead ends: 418 [2020-09-24 14:54:30,366 INFO L226 Difference]: Without dead ends: 270 [2020-09-24 14:54:30,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:54:30,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-09-24 14:54:30,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 226. [2020-09-24 14:54:30,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-09-24 14:54:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 272 transitions. [2020-09-24 14:54:30,382 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 272 transitions. Word has length 133 [2020-09-24 14:54:30,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:30,382 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 272 transitions. [2020-09-24 14:54:30,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 14:54:30,383 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 272 transitions. [2020-09-24 14:54:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-09-24 14:54:30,386 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:30,387 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:30,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 14:54:30,387 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:30,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:30,388 INFO L82 PathProgramCache]: Analyzing trace with hash 688521105, now seen corresponding path program 7 times [2020-09-24 14:54:30,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:30,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920436392] [2020-09-24 14:54:30,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-24 14:54:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-24 14:54:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-09-24 14:54:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 6 proven. 131 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:30,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920436392] [2020-09-24 14:54:30,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:30,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 14:54:30,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463097105] [2020-09-24 14:54:30,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 14:54:30,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:30,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 14:54:30,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:54:30,614 INFO L87 Difference]: Start difference. First operand 226 states and 272 transitions. Second operand 11 states. [2020-09-24 14:54:30,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:30,777 INFO L93 Difference]: Finished difference Result 483 states and 581 transitions. [2020-09-24 14:54:30,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 14:54:30,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 138 [2020-09-24 14:54:30,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:30,781 INFO L225 Difference]: With dead ends: 483 [2020-09-24 14:54:30,781 INFO L226 Difference]: Without dead ends: 328 [2020-09-24 14:54:30,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-09-24 14:54:30,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-09-24 14:54:30,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 236. [2020-09-24 14:54:30,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-09-24 14:54:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 285 transitions. [2020-09-24 14:54:30,796 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 285 transitions. Word has length 138 [2020-09-24 14:54:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:30,797 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 285 transitions. [2020-09-24 14:54:30,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 14:54:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 285 transitions. [2020-09-24 14:54:30,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-09-24 14:54:30,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:30,800 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:30,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 14:54:30,801 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:30,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:30,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1951232195, now seen corresponding path program 6 times [2020-09-24 14:54:30,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:30,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341903447] [2020-09-24 14:54:30,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-24 14:54:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-24 14:54:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-09-24 14:54:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 119 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:31,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341903447] [2020-09-24 14:54:31,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:31,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 14:54:31,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653206176] [2020-09-24 14:54:31,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 14:54:31,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:31,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 14:54:31,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:54:31,096 INFO L87 Difference]: Start difference. First operand 236 states and 285 transitions. Second operand 11 states. [2020-09-24 14:54:31,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:31,353 INFO L93 Difference]: Finished difference Result 437 states and 535 transitions. [2020-09-24 14:54:31,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 14:54:31,353 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 138 [2020-09-24 14:54:31,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:31,356 INFO L225 Difference]: With dead ends: 437 [2020-09-24 14:54:31,356 INFO L226 Difference]: Without dead ends: 284 [2020-09-24 14:54:31,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-09-24 14:54:31,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-24 14:54:31,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 236. [2020-09-24 14:54:31,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-09-24 14:54:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 285 transitions. [2020-09-24 14:54:31,373 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 285 transitions. Word has length 138 [2020-09-24 14:54:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:31,373 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 285 transitions. [2020-09-24 14:54:31,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 14:54:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 285 transitions. [2020-09-24 14:54:31,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-09-24 14:54:31,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:31,376 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:31,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 14:54:31,377 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:31,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:31,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1216030823, now seen corresponding path program 8 times [2020-09-24 14:54:31,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:31,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024316624] [2020-09-24 14:54:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 14:54:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-24 14:54:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-24 14:54:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 6 proven. 168 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:31,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024316624] [2020-09-24 14:54:31,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:31,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 14:54:31,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472520180] [2020-09-24 14:54:31,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 14:54:31,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:31,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 14:54:31,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-09-24 14:54:31,609 INFO L87 Difference]: Start difference. First operand 236 states and 285 transitions. Second operand 12 states. [2020-09-24 14:54:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:31,793 INFO L93 Difference]: Finished difference Result 510 states and 614 transitions. [2020-09-24 14:54:31,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 14:54:31,794 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 143 [2020-09-24 14:54:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:31,796 INFO L225 Difference]: With dead ends: 510 [2020-09-24 14:54:31,797 INFO L226 Difference]: Without dead ends: 350 [2020-09-24 14:54:31,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-09-24 14:54:31,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-09-24 14:54:31,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 246. [2020-09-24 14:54:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-09-24 14:54:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 298 transitions. [2020-09-24 14:54:31,813 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 298 transitions. Word has length 143 [2020-09-24 14:54:31,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:31,813 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 298 transitions. [2020-09-24 14:54:31,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 14:54:31,814 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 298 transitions. [2020-09-24 14:54:31,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-09-24 14:54:31,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:31,816 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:31,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 14:54:31,816 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:31,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:31,817 INFO L82 PathProgramCache]: Analyzing trace with hash 46680267, now seen corresponding path program 7 times [2020-09-24 14:54:31,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:31,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095608261] [2020-09-24 14:54:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 14:54:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-24 14:54:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-24 14:54:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:32,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095608261] [2020-09-24 14:54:32,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:32,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 14:54:32,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833585797] [2020-09-24 14:54:32,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 14:54:32,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:32,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 14:54:32,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 14:54:32,215 INFO L87 Difference]: Start difference. First operand 246 states and 298 transitions. Second operand 12 states. [2020-09-24 14:54:32,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:32,609 INFO L93 Difference]: Finished difference Result 456 states and 560 transitions. [2020-09-24 14:54:32,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 14:54:32,610 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 143 [2020-09-24 14:54:32,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:32,614 INFO L225 Difference]: With dead ends: 456 [2020-09-24 14:54:32,614 INFO L226 Difference]: Without dead ends: 298 [2020-09-24 14:54:32,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-24 14:54:32,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-09-24 14:54:32,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 246. [2020-09-24 14:54:32,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-09-24 14:54:32,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 298 transitions. [2020-09-24 14:54:32,640 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 298 transitions. Word has length 143 [2020-09-24 14:54:32,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:32,641 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 298 transitions. [2020-09-24 14:54:32,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 14:54:32,642 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 298 transitions. [2020-09-24 14:54:32,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-24 14:54:32,647 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:32,647 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:32,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 14:54:32,648 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:32,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:32,649 INFO L82 PathProgramCache]: Analyzing trace with hash -910703471, now seen corresponding path program 9 times [2020-09-24 14:54:32,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:32,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522501292] [2020-09-24 14:54:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-09-24 14:54:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-09-24 14:54:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-24 14:54:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 6 proven. 210 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:33,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522501292] [2020-09-24 14:54:33,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:33,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 14:54:33,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288831038] [2020-09-24 14:54:33,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 14:54:33,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:33,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 14:54:33,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-09-24 14:54:33,044 INFO L87 Difference]: Start difference. First operand 246 states and 298 transitions. Second operand 13 states. [2020-09-24 14:54:33,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:33,339 INFO L93 Difference]: Finished difference Result 537 states and 647 transitions. [2020-09-24 14:54:33,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 14:54:33,340 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 148 [2020-09-24 14:54:33,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:33,344 INFO L225 Difference]: With dead ends: 537 [2020-09-24 14:54:33,344 INFO L226 Difference]: Without dead ends: 372 [2020-09-24 14:54:33,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-09-24 14:54:33,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-09-24 14:54:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 256. [2020-09-24 14:54:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-09-24 14:54:33,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 311 transitions. [2020-09-24 14:54:33,370 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 311 transitions. Word has length 148 [2020-09-24 14:54:33,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:33,370 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 311 transitions. [2020-09-24 14:54:33,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 14:54:33,371 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 311 transitions. [2020-09-24 14:54:33,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-24 14:54:33,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:33,375 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:33,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 14:54:33,376 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:33,376 INFO L82 PathProgramCache]: Analyzing trace with hash 352007619, now seen corresponding path program 8 times [2020-09-24 14:54:33,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:33,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400937128] [2020-09-24 14:54:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-09-24 14:54:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-09-24 14:54:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-24 14:54:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 7 proven. 194 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:33,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400937128] [2020-09-24 14:54:33,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:33,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 14:54:33,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862554847] [2020-09-24 14:54:33,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 14:54:33,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:33,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 14:54:33,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-09-24 14:54:33,833 INFO L87 Difference]: Start difference. First operand 256 states and 311 transitions. Second operand 13 states. [2020-09-24 14:54:34,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:34,181 INFO L93 Difference]: Finished difference Result 475 states and 585 transitions. [2020-09-24 14:54:34,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 14:54:34,182 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 148 [2020-09-24 14:54:34,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:34,184 INFO L225 Difference]: With dead ends: 475 [2020-09-24 14:54:34,184 INFO L226 Difference]: Without dead ends: 312 [2020-09-24 14:54:34,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-09-24 14:54:34,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-09-24 14:54:34,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 256. [2020-09-24 14:54:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-09-24 14:54:34,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 311 transitions. [2020-09-24 14:54:34,206 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 311 transitions. Word has length 148 [2020-09-24 14:54:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:34,206 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 311 transitions. [2020-09-24 14:54:34,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 14:54:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 311 transitions. [2020-09-24 14:54:34,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-24 14:54:34,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:34,209 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:34,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 14:54:34,209 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:34,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:34,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1515572583, now seen corresponding path program 10 times [2020-09-24 14:54:34,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:34,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356553899] [2020-09-24 14:54:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-24 14:54:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-24 14:54:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-24 14:54:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 6 proven. 257 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:34,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356553899] [2020-09-24 14:54:34,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:34,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 14:54:34,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644349936] [2020-09-24 14:54:34,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 14:54:34,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:34,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 14:54:34,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-09-24 14:54:34,549 INFO L87 Difference]: Start difference. First operand 256 states and 311 transitions. Second operand 14 states. [2020-09-24 14:54:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:34,828 INFO L93 Difference]: Finished difference Result 564 states and 680 transitions. [2020-09-24 14:54:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 14:54:34,829 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2020-09-24 14:54:34,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:34,833 INFO L225 Difference]: With dead ends: 564 [2020-09-24 14:54:34,834 INFO L226 Difference]: Without dead ends: 394 [2020-09-24 14:54:34,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-09-24 14:54:34,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-09-24 14:54:34,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 266. [2020-09-24 14:54:34,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-09-24 14:54:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 324 transitions. [2020-09-24 14:54:34,862 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 324 transitions. Word has length 153 [2020-09-24 14:54:34,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:34,863 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 324 transitions. [2020-09-24 14:54:34,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 14:54:34,863 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 324 transitions. [2020-09-24 14:54:34,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-24 14:54:34,867 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:34,867 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:34,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 14:54:34,869 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:34,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:34,870 INFO L82 PathProgramCache]: Analyzing trace with hash -252861493, now seen corresponding path program 9 times [2020-09-24 14:54:34,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:34,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966039601] [2020-09-24 14:54:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-24 14:54:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-24 14:54:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-24 14:54:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 7 proven. 239 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:35,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966039601] [2020-09-24 14:54:35,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:35,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 14:54:35,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315859375] [2020-09-24 14:54:35,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 14:54:35,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:35,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 14:54:35,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-24 14:54:35,344 INFO L87 Difference]: Start difference. First operand 266 states and 324 transitions. Second operand 14 states. [2020-09-24 14:54:35,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:35,756 INFO L93 Difference]: Finished difference Result 494 states and 610 transitions. [2020-09-24 14:54:35,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 14:54:35,757 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2020-09-24 14:54:35,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:35,759 INFO L225 Difference]: With dead ends: 494 [2020-09-24 14:54:35,760 INFO L226 Difference]: Without dead ends: 326 [2020-09-24 14:54:35,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-24 14:54:35,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-09-24 14:54:35,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 266. [2020-09-24 14:54:35,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-09-24 14:54:35,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 324 transitions. [2020-09-24 14:54:35,781 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 324 transitions. Word has length 153 [2020-09-24 14:54:35,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:35,781 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 324 transitions. [2020-09-24 14:54:35,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 14:54:35,781 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 324 transitions. [2020-09-24 14:54:35,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-24 14:54:35,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:35,784 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:35,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 14:54:35,784 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:35,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:35,785 INFO L82 PathProgramCache]: Analyzing trace with hash 867387793, now seen corresponding path program 11 times [2020-09-24 14:54:35,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:35,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027915915] [2020-09-24 14:54:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 14:54:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-24 14:54:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-09-24 14:54:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 6 proven. 309 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:36,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027915915] [2020-09-24 14:54:36,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:36,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 14:54:36,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97072408] [2020-09-24 14:54:36,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 14:54:36,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:36,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 14:54:36,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-09-24 14:54:36,141 INFO L87 Difference]: Start difference. First operand 266 states and 324 transitions. Second operand 15 states. [2020-09-24 14:54:36,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:36,384 INFO L93 Difference]: Finished difference Result 591 states and 713 transitions. [2020-09-24 14:54:36,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 14:54:36,385 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 158 [2020-09-24 14:54:36,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:36,388 INFO L225 Difference]: With dead ends: 591 [2020-09-24 14:54:36,388 INFO L226 Difference]: Without dead ends: 416 [2020-09-24 14:54:36,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-09-24 14:54:36,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-09-24 14:54:36,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 276. [2020-09-24 14:54:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-09-24 14:54:36,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 337 transitions. [2020-09-24 14:54:36,416 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 337 transitions. Word has length 158 [2020-09-24 14:54:36,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:36,417 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 337 transitions. [2020-09-24 14:54:36,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 14:54:36,417 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 337 transitions. [2020-09-24 14:54:36,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-24 14:54:36,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:36,419 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:36,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 14:54:36,420 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:36,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:36,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2130098883, now seen corresponding path program 10 times [2020-09-24 14:54:36,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:36,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693314240] [2020-09-24 14:54:36,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:36,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 14:54:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-24 14:54:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-09-24 14:54:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 7 proven. 289 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:36,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693314240] [2020-09-24 14:54:36,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:36,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 14:54:36,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302302955] [2020-09-24 14:54:36,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 14:54:36,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:36,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 14:54:36,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-24 14:54:36,900 INFO L87 Difference]: Start difference. First operand 276 states and 337 transitions. Second operand 15 states. [2020-09-24 14:54:37,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:37,321 INFO L93 Difference]: Finished difference Result 513 states and 635 transitions. [2020-09-24 14:54:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 14:54:37,322 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 158 [2020-09-24 14:54:37,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:37,324 INFO L225 Difference]: With dead ends: 513 [2020-09-24 14:54:37,324 INFO L226 Difference]: Without dead ends: 340 [2020-09-24 14:54:37,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-09-24 14:54:37,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-24 14:54:37,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 276. [2020-09-24 14:54:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-09-24 14:54:37,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 337 transitions. [2020-09-24 14:54:37,342 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 337 transitions. Word has length 158 [2020-09-24 14:54:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:37,342 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 337 transitions. [2020-09-24 14:54:37,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 14:54:37,343 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 337 transitions. [2020-09-24 14:54:37,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-09-24 14:54:37,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:37,345 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:37,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-24 14:54:37,348 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:37,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:37,348 INFO L82 PathProgramCache]: Analyzing trace with hash 890883481, now seen corresponding path program 12 times [2020-09-24 14:54:37,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:37,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881907413] [2020-09-24 14:54:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-09-24 14:54:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-09-24 14:54:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-24 14:54:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 6 proven. 366 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:37,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881907413] [2020-09-24 14:54:37,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:37,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 14:54:37,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878695040] [2020-09-24 14:54:37,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 14:54:37,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:37,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 14:54:37,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-09-24 14:54:37,742 INFO L87 Difference]: Start difference. First operand 276 states and 337 transitions. Second operand 16 states. [2020-09-24 14:54:38,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:38,090 INFO L93 Difference]: Finished difference Result 618 states and 746 transitions. [2020-09-24 14:54:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 14:54:38,091 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 163 [2020-09-24 14:54:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:38,095 INFO L225 Difference]: With dead ends: 618 [2020-09-24 14:54:38,095 INFO L226 Difference]: Without dead ends: 438 [2020-09-24 14:54:38,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:54:38,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-09-24 14:54:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 286. [2020-09-24 14:54:38,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-09-24 14:54:38,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 350 transitions. [2020-09-24 14:54:38,123 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 350 transitions. Word has length 163 [2020-09-24 14:54:38,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:38,124 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 350 transitions. [2020-09-24 14:54:38,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 14:54:38,124 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 350 transitions. [2020-09-24 14:54:38,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-09-24 14:54:38,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:38,128 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:38,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-24 14:54:38,129 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:38,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2141372725, now seen corresponding path program 11 times [2020-09-24 14:54:38,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:38,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928933420] [2020-09-24 14:54:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-09-24 14:54:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-09-24 14:54:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-24 14:54:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 7 proven. 344 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:38,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928933420] [2020-09-24 14:54:38,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:38,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 14:54:38,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507399856] [2020-09-24 14:54:38,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 14:54:38,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:38,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 14:54:38,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-09-24 14:54:38,613 INFO L87 Difference]: Start difference. First operand 286 states and 350 transitions. Second operand 16 states. [2020-09-24 14:54:39,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:39,043 INFO L93 Difference]: Finished difference Result 532 states and 660 transitions. [2020-09-24 14:54:39,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 14:54:39,044 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 163 [2020-09-24 14:54:39,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:39,047 INFO L225 Difference]: With dead ends: 532 [2020-09-24 14:54:39,047 INFO L226 Difference]: Without dead ends: 354 [2020-09-24 14:54:39,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:54:39,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-09-24 14:54:39,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 286. [2020-09-24 14:54:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-09-24 14:54:39,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 350 transitions. [2020-09-24 14:54:39,064 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 350 transitions. Word has length 163 [2020-09-24 14:54:39,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:39,065 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 350 transitions. [2020-09-24 14:54:39,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 14:54:39,065 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 350 transitions. [2020-09-24 14:54:39,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-09-24 14:54:39,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:39,067 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:39,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-24 14:54:39,068 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:39,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:39,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1892454033, now seen corresponding path program 13 times [2020-09-24 14:54:39,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:39,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514433773] [2020-09-24 14:54:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-09-24 14:54:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-09-24 14:54:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 14:54:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 6 proven. 428 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:39,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514433773] [2020-09-24 14:54:39,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:39,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 14:54:39,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146873835] [2020-09-24 14:54:39,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 14:54:39,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:39,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 14:54:39,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:54:39,441 INFO L87 Difference]: Start difference. First operand 286 states and 350 transitions. Second operand 17 states. [2020-09-24 14:54:39,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:39,774 INFO L93 Difference]: Finished difference Result 645 states and 779 transitions. [2020-09-24 14:54:39,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 14:54:39,775 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 168 [2020-09-24 14:54:39,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:39,780 INFO L225 Difference]: With dead ends: 645 [2020-09-24 14:54:39,780 INFO L226 Difference]: Without dead ends: 460 [2020-09-24 14:54:39,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-09-24 14:54:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-09-24 14:54:39,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 296. [2020-09-24 14:54:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-09-24 14:54:39,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 363 transitions. [2020-09-24 14:54:39,815 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 363 transitions. Word has length 168 [2020-09-24 14:54:39,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:39,815 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 363 transitions. [2020-09-24 14:54:39,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 14:54:39,816 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 363 transitions. [2020-09-24 14:54:39,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-09-24 14:54:39,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:39,819 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:39,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-24 14:54:39,819 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:39,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1139802173, now seen corresponding path program 12 times [2020-09-24 14:54:39,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:39,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610282007] [2020-09-24 14:54:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-09-24 14:54:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-09-24 14:54:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 14:54:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 7 proven. 404 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:40,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610282007] [2020-09-24 14:54:40,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:40,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 14:54:40,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116685921] [2020-09-24 14:54:40,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 14:54:40,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:40,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 14:54:40,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:54:40,317 INFO L87 Difference]: Start difference. First operand 296 states and 363 transitions. Second operand 17 states. [2020-09-24 14:54:40,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:40,908 INFO L93 Difference]: Finished difference Result 551 states and 685 transitions. [2020-09-24 14:54:40,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 14:54:40,909 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 168 [2020-09-24 14:54:40,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:40,912 INFO L225 Difference]: With dead ends: 551 [2020-09-24 14:54:40,912 INFO L226 Difference]: Without dead ends: 368 [2020-09-24 14:54:40,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-09-24 14:54:40,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-09-24 14:54:40,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 296. [2020-09-24 14:54:40,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-09-24 14:54:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 363 transitions. [2020-09-24 14:54:40,933 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 363 transitions. Word has length 168 [2020-09-24 14:54:40,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:40,933 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 363 transitions. [2020-09-24 14:54:40,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 14:54:40,934 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 363 transitions. [2020-09-24 14:54:40,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-24 14:54:40,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:40,936 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:40,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-24 14:54:40,937 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:40,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:40,937 INFO L82 PathProgramCache]: Analyzing trace with hash -33314663, now seen corresponding path program 14 times [2020-09-24 14:54:40,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:40,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772694067] [2020-09-24 14:54:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-09-24 14:54:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-24 14:54:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-24 14:54:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 6 proven. 495 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:41,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772694067] [2020-09-24 14:54:41,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:41,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 14:54:41,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091350347] [2020-09-24 14:54:41,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 14:54:41,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:41,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 14:54:41,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-09-24 14:54:41,326 INFO L87 Difference]: Start difference. First operand 296 states and 363 transitions. Second operand 18 states. [2020-09-24 14:54:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:41,671 INFO L93 Difference]: Finished difference Result 672 states and 812 transitions. [2020-09-24 14:54:41,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 14:54:41,672 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 173 [2020-09-24 14:54:41,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:41,676 INFO L225 Difference]: With dead ends: 672 [2020-09-24 14:54:41,677 INFO L226 Difference]: Without dead ends: 482 [2020-09-24 14:54:41,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-09-24 14:54:41,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-09-24 14:54:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 306. [2020-09-24 14:54:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-09-24 14:54:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 376 transitions. [2020-09-24 14:54:41,712 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 376 transitions. Word has length 173 [2020-09-24 14:54:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:41,713 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 376 transitions. [2020-09-24 14:54:41,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 14:54:41,713 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 376 transitions. [2020-09-24 14:54:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-24 14:54:41,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:41,717 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:41,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-24 14:54:41,717 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:41,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:41,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1229396427, now seen corresponding path program 13 times [2020-09-24 14:54:41,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:41,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013241839] [2020-09-24 14:54:41,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-09-24 14:54:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-24 14:54:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-24 14:54:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 7 proven. 469 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:42,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013241839] [2020-09-24 14:54:42,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:42,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 14:54:42,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091276195] [2020-09-24 14:54:42,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 14:54:42,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:42,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 14:54:42,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-09-24 14:54:42,239 INFO L87 Difference]: Start difference. First operand 306 states and 376 transitions. Second operand 18 states. [2020-09-24 14:54:42,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:42,878 INFO L93 Difference]: Finished difference Result 570 states and 710 transitions. [2020-09-24 14:54:42,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 14:54:42,879 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 173 [2020-09-24 14:54:42,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:42,881 INFO L225 Difference]: With dead ends: 570 [2020-09-24 14:54:42,881 INFO L226 Difference]: Without dead ends: 382 [2020-09-24 14:54:42,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-24 14:54:42,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-09-24 14:54:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 306. [2020-09-24 14:54:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-09-24 14:54:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 376 transitions. [2020-09-24 14:54:42,903 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 376 transitions. Word has length 173 [2020-09-24 14:54:42,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:42,903 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 376 transitions. [2020-09-24 14:54:42,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 14:54:42,903 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 376 transitions. [2020-09-24 14:54:42,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-09-24 14:54:42,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:42,907 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:42,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-24 14:54:42,907 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:42,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:42,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2032954479, now seen corresponding path program 15 times [2020-09-24 14:54:42,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:42,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584989132] [2020-09-24 14:54:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-09-24 14:54:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-09-24 14:54:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-09-24 14:54:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2020-09-24 14:54:43,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584989132] [2020-09-24 14:54:43,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:54:43,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:54:43,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558978735] [2020-09-24 14:54:43,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:54:43,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:43,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:54:43,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:54:43,012 INFO L87 Difference]: Start difference. First operand 306 states and 376 transitions. Second operand 3 states. [2020-09-24 14:54:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:43,035 INFO L93 Difference]: Finished difference Result 321 states and 393 transitions. [2020-09-24 14:54:43,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:54:43,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 178 [2020-09-24 14:54:43,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:43,038 INFO L225 Difference]: With dead ends: 321 [2020-09-24 14:54:43,038 INFO L226 Difference]: Without dead ends: 305 [2020-09-24 14:54:43,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:54:43,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-09-24 14:54:43,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2020-09-24 14:54:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-09-24 14:54:43,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 374 transitions. [2020-09-24 14:54:43,062 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 374 transitions. Word has length 178 [2020-09-24 14:54:43,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:43,063 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 374 transitions. [2020-09-24 14:54:43,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:54:43,063 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 374 transitions. [2020-09-24 14:54:43,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-09-24 14:54:43,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:43,066 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:43,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-24 14:54:43,066 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:43,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:43,067 INFO L82 PathProgramCache]: Analyzing trace with hash 368593816, now seen corresponding path program 1 times [2020-09-24 14:54:43,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:43,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498721545] [2020-09-24 14:54:43,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-09-24 14:54:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-09-24 14:54:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-09-24 14:54:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2020-09-24 14:54:43,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498721545] [2020-09-24 14:54:43,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:54:43,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:54:43,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845044615] [2020-09-24 14:54:43,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:54:43,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:43,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:54:43,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:54:43,202 INFO L87 Difference]: Start difference. First operand 305 states and 374 transitions. Second operand 4 states. [2020-09-24 14:54:43,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:43,227 INFO L93 Difference]: Finished difference Result 321 states and 392 transitions. [2020-09-24 14:54:43,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 14:54:43,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 180 [2020-09-24 14:54:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:43,232 INFO L225 Difference]: With dead ends: 321 [2020-09-24 14:54:43,233 INFO L226 Difference]: Without dead ends: 304 [2020-09-24 14:54:43,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:54:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-24 14:54:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2020-09-24 14:54:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-09-24 14:54:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 372 transitions. [2020-09-24 14:54:43,250 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 372 transitions. Word has length 180 [2020-09-24 14:54:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:43,250 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 372 transitions. [2020-09-24 14:54:43,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:54:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 372 transitions. [2020-09-24 14:54:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-09-24 14:54:43,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:43,253 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:43,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-24 14:54:43,254 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:43,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:43,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1683689272, now seen corresponding path program 1 times [2020-09-24 14:54:43,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:43,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650478127] [2020-09-24 14:54:43,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-09-24 14:54:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-09-24 14:54:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-09-24 14:54:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 6 proven. 567 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:43,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650478127] [2020-09-24 14:54:43,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:43,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 14:54:43,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824213465] [2020-09-24 14:54:43,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 14:54:43,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:43,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 14:54:43,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-09-24 14:54:43,694 INFO L87 Difference]: Start difference. First operand 304 states and 372 transitions. Second operand 19 states. [2020-09-24 14:54:44,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:44,049 INFO L93 Difference]: Finished difference Result 695 states and 837 transitions. [2020-09-24 14:54:44,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 14:54:44,050 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 180 [2020-09-24 14:54:44,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:44,054 INFO L225 Difference]: With dead ends: 695 [2020-09-24 14:54:44,054 INFO L226 Difference]: Without dead ends: 502 [2020-09-24 14:54:44,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-09-24 14:54:44,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-09-24 14:54:44,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 314. [2020-09-24 14:54:44,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-09-24 14:54:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 385 transitions. [2020-09-24 14:54:44,078 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 385 transitions. Word has length 180 [2020-09-24 14:54:44,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:44,078 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 385 transitions. [2020-09-24 14:54:44,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 14:54:44,079 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 385 transitions. [2020-09-24 14:54:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-09-24 14:54:44,081 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:44,082 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:44,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-24 14:54:44,082 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:44,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:44,083 INFO L82 PathProgramCache]: Analyzing trace with hash -326698006, now seen corresponding path program 1 times [2020-09-24 14:54:44,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:44,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216848056] [2020-09-24 14:54:44,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-09-24 14:54:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-09-24 14:54:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-09-24 14:54:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 7 proven. 539 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:44,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216848056] [2020-09-24 14:54:44,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:44,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 14:54:44,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964271882] [2020-09-24 14:54:44,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 14:54:44,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:44,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 14:54:44,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-24 14:54:44,871 INFO L87 Difference]: Start difference. First operand 314 states and 385 transitions. Second operand 19 states. [2020-09-24 14:54:45,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:45,762 INFO L93 Difference]: Finished difference Result 585 states and 727 transitions. [2020-09-24 14:54:45,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 14:54:45,763 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 180 [2020-09-24 14:54:45,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:45,765 INFO L225 Difference]: With dead ends: 585 [2020-09-24 14:54:45,765 INFO L226 Difference]: Without dead ends: 394 [2020-09-24 14:54:45,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-09-24 14:54:45,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-09-24 14:54:45,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 314. [2020-09-24 14:54:45,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-09-24 14:54:45,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 385 transitions. [2020-09-24 14:54:45,788 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 385 transitions. Word has length 180 [2020-09-24 14:54:45,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:45,789 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 385 transitions. [2020-09-24 14:54:45,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 14:54:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 385 transitions. [2020-09-24 14:54:45,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-09-24 14:54:45,791 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:45,792 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:45,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-24 14:54:45,792 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:45,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:45,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1714201280, now seen corresponding path program 2 times [2020-09-24 14:54:45,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:45,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276321051] [2020-09-24 14:54:45,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:45,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:45,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:45,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:46,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-09-24 14:54:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:46,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-09-24 14:54:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:46,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-09-24 14:54:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 6 proven. 644 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:46,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276321051] [2020-09-24 14:54:46,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:46,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 14:54:46,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657371115] [2020-09-24 14:54:46,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 14:54:46,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:46,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 14:54:46,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-09-24 14:54:46,316 INFO L87 Difference]: Start difference. First operand 314 states and 385 transitions. Second operand 20 states. [2020-09-24 14:54:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:46,741 INFO L93 Difference]: Finished difference Result 722 states and 870 transitions. [2020-09-24 14:54:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:54:46,742 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 185 [2020-09-24 14:54:46,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:46,749 INFO L225 Difference]: With dead ends: 722 [2020-09-24 14:54:46,750 INFO L226 Difference]: Without dead ends: 524 [2020-09-24 14:54:46,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-09-24 14:54:46,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-09-24 14:54:46,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 324. [2020-09-24 14:54:46,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-09-24 14:54:46,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 398 transitions. [2020-09-24 14:54:46,789 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 398 transitions. Word has length 185 [2020-09-24 14:54:46,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:46,790 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 398 transitions. [2020-09-24 14:54:46,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 14:54:46,790 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 398 transitions. [2020-09-24 14:54:46,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-09-24 14:54:46,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:46,795 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:46,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-24 14:54:46,796 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:46,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:46,796 INFO L82 PathProgramCache]: Analyzing trace with hash 570378738, now seen corresponding path program 2 times [2020-09-24 14:54:46,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:46,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052285702] [2020-09-24 14:54:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:46,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:46,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:46,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:47,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-09-24 14:54:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:47,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-09-24 14:54:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:47,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-09-24 14:54:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 7 proven. 614 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:47,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052285702] [2020-09-24 14:54:47,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:47,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 14:54:47,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923169717] [2020-09-24 14:54:47,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 14:54:47,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:47,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 14:54:47,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-24 14:54:47,689 INFO L87 Difference]: Start difference. First operand 324 states and 398 transitions. Second operand 20 states. [2020-09-24 14:54:48,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:48,622 INFO L93 Difference]: Finished difference Result 604 states and 752 transitions. [2020-09-24 14:54:48,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:54:48,627 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 185 [2020-09-24 14:54:48,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:48,630 INFO L225 Difference]: With dead ends: 604 [2020-09-24 14:54:48,630 INFO L226 Difference]: Without dead ends: 408 [2020-09-24 14:54:48,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-09-24 14:54:48,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-09-24 14:54:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 324. [2020-09-24 14:54:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-09-24 14:54:48,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 398 transitions. [2020-09-24 14:54:48,651 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 398 transitions. Word has length 185 [2020-09-24 14:54:48,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:48,651 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 398 transitions. [2020-09-24 14:54:48,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 14:54:48,651 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 398 transitions. [2020-09-24 14:54:48,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-09-24 14:54:48,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:48,654 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:48,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-24 14:54:48,654 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:48,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:48,655 INFO L82 PathProgramCache]: Analyzing trace with hash 922915896, now seen corresponding path program 3 times [2020-09-24 14:54:48,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:48,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995546098] [2020-09-24 14:54:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:49,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-09-24 14:54:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:49,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-09-24 14:54:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:49,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-24 14:54:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 6 proven. 726 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:49,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995546098] [2020-09-24 14:54:49,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:49,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 14:54:49,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865500720] [2020-09-24 14:54:49,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 14:54:49,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:49,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 14:54:49,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-09-24 14:54:49,209 INFO L87 Difference]: Start difference. First operand 324 states and 398 transitions. Second operand 21 states. [2020-09-24 14:54:49,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:49,584 INFO L93 Difference]: Finished difference Result 749 states and 903 transitions. [2020-09-24 14:54:49,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 14:54:49,585 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 190 [2020-09-24 14:54:49,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:49,590 INFO L225 Difference]: With dead ends: 749 [2020-09-24 14:54:49,591 INFO L226 Difference]: Without dead ends: 546 [2020-09-24 14:54:49,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-09-24 14:54:49,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-09-24 14:54:49,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 334. [2020-09-24 14:54:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-09-24 14:54:49,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 411 transitions. [2020-09-24 14:54:49,614 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 411 transitions. Word has length 190 [2020-09-24 14:54:49,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:49,615 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 411 transitions. [2020-09-24 14:54:49,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 14:54:49,615 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 411 transitions. [2020-09-24 14:54:49,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-09-24 14:54:49,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:49,617 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:49,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-24 14:54:49,618 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:49,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1087471382, now seen corresponding path program 3 times [2020-09-24 14:54:49,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:49,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190533944] [2020-09-24 14:54:49,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:49,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:49,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:49,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-09-24 14:54:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-09-24 14:54:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-24 14:54:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 7 proven. 694 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:50,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190533944] [2020-09-24 14:54:50,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:50,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 14:54:50,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373796852] [2020-09-24 14:54:50,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 14:54:50,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:50,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 14:54:50,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-24 14:54:50,297 INFO L87 Difference]: Start difference. First operand 334 states and 411 transitions. Second operand 21 states. [2020-09-24 14:54:51,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:51,315 INFO L93 Difference]: Finished difference Result 623 states and 777 transitions. [2020-09-24 14:54:51,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 14:54:51,325 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 190 [2020-09-24 14:54:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:51,329 INFO L225 Difference]: With dead ends: 623 [2020-09-24 14:54:51,329 INFO L226 Difference]: Without dead ends: 422 [2020-09-24 14:54:51,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-24 14:54:51,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-09-24 14:54:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 334. [2020-09-24 14:54:51,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-09-24 14:54:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 411 transitions. [2020-09-24 14:54:51,349 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 411 transitions. Word has length 190 [2020-09-24 14:54:51,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:51,350 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 411 transitions. [2020-09-24 14:54:51,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 14:54:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 411 transitions. [2020-09-24 14:54:51,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-09-24 14:54:51,352 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:51,352 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:51,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-24 14:54:51,352 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:51,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:51,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1276573760, now seen corresponding path program 4 times [2020-09-24 14:54:51,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:51,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455992562] [2020-09-24 14:54:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-09-24 14:54:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-09-24 14:54:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-24 14:54:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 6 proven. 813 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:51,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455992562] [2020-09-24 14:54:51,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:51,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 14:54:51,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843183338] [2020-09-24 14:54:51,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 14:54:51,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:51,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 14:54:51,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-09-24 14:54:51,912 INFO L87 Difference]: Start difference. First operand 334 states and 411 transitions. Second operand 22 states. [2020-09-24 14:54:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:52,372 INFO L93 Difference]: Finished difference Result 776 states and 936 transitions. [2020-09-24 14:54:52,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 14:54:52,376 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 195 [2020-09-24 14:54:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:52,379 INFO L225 Difference]: With dead ends: 776 [2020-09-24 14:54:52,379 INFO L226 Difference]: Without dead ends: 568 [2020-09-24 14:54:52,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-09-24 14:54:52,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-09-24 14:54:52,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 344. [2020-09-24 14:54:52,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-09-24 14:54:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 424 transitions. [2020-09-24 14:54:52,401 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 424 transitions. Word has length 195 [2020-09-24 14:54:52,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:52,402 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 424 transitions. [2020-09-24 14:54:52,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 14:54:52,402 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 424 transitions. [2020-09-24 14:54:52,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-09-24 14:54:52,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:52,404 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:52,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-24 14:54:52,405 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:52,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:52,405 INFO L82 PathProgramCache]: Analyzing trace with hash -733813518, now seen corresponding path program 4 times [2020-09-24 14:54:52,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:52,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316691432] [2020-09-24 14:54:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:52,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:52,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:52,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:53,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-09-24 14:54:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:53,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-09-24 14:54:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:53,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-24 14:54:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 7 proven. 779 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:53,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316691432] [2020-09-24 14:54:53,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:53,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 14:54:53,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539852624] [2020-09-24 14:54:53,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 14:54:53,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:53,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 14:54:53,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-09-24 14:54:53,060 INFO L87 Difference]: Start difference. First operand 344 states and 424 transitions. Second operand 22 states. [2020-09-24 14:54:54,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:54,197 INFO L93 Difference]: Finished difference Result 642 states and 802 transitions. [2020-09-24 14:54:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 14:54:54,201 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 195 [2020-09-24 14:54:54,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:54,207 INFO L225 Difference]: With dead ends: 642 [2020-09-24 14:54:54,208 INFO L226 Difference]: Without dead ends: 436 [2020-09-24 14:54:54,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-09-24 14:54:54,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-09-24 14:54:54,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 344. [2020-09-24 14:54:54,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-09-24 14:54:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 424 transitions. [2020-09-24 14:54:54,235 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 424 transitions. Word has length 195 [2020-09-24 14:54:54,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:54,235 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 424 transitions. [2020-09-24 14:54:54,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 14:54:54,235 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 424 transitions. [2020-09-24 14:54:54,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-09-24 14:54:54,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:54,238 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:54,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-09-24 14:54:54,238 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:54,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:54,238 INFO L82 PathProgramCache]: Analyzing trace with hash -171452104, now seen corresponding path program 5 times [2020-09-24 14:54:54,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:54,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617107950] [2020-09-24 14:54:54,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:54,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:54,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:54,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:54,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-09-24 14:54:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:54,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-24 14:54:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:54,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-09-24 14:54:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 944 backedges. 6 proven. 905 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:54,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617107950] [2020-09-24 14:54:54,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:54,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 14:54:54,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934950409] [2020-09-24 14:54:54,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 14:54:54,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:54,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 14:54:54,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-09-24 14:54:54,910 INFO L87 Difference]: Start difference. First operand 344 states and 424 transitions. Second operand 23 states. [2020-09-24 14:54:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:55,222 INFO L93 Difference]: Finished difference Result 803 states and 969 transitions. [2020-09-24 14:54:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 14:54:55,224 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2020-09-24 14:54:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:55,227 INFO L225 Difference]: With dead ends: 803 [2020-09-24 14:54:55,227 INFO L226 Difference]: Without dead ends: 590 [2020-09-24 14:54:55,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-09-24 14:54:55,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-09-24 14:54:55,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 354. [2020-09-24 14:54:55,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-09-24 14:54:55,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 437 transitions. [2020-09-24 14:54:55,251 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 437 transitions. Word has length 200 [2020-09-24 14:54:55,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:55,251 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 437 transitions. [2020-09-24 14:54:55,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 14:54:55,252 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 437 transitions. [2020-09-24 14:54:55,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-09-24 14:54:55,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:55,254 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:55,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-24 14:54:55,254 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:55,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:55,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2113127914, now seen corresponding path program 5 times [2020-09-24 14:54:55,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:55,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814963236] [2020-09-24 14:54:55,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:55,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:55,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:55,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:55,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-09-24 14:54:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:55,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-24 14:54:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:55,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-09-24 14:54:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 7 proven. 869 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:56,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814963236] [2020-09-24 14:54:56,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:56,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 14:54:56,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773765260] [2020-09-24 14:54:56,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 14:54:56,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:56,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 14:54:56,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-09-24 14:54:56,002 INFO L87 Difference]: Start difference. First operand 354 states and 437 transitions. Second operand 23 states. [2020-09-24 14:54:57,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:57,264 INFO L93 Difference]: Finished difference Result 661 states and 827 transitions. [2020-09-24 14:54:57,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 14:54:57,265 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2020-09-24 14:54:57,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:57,267 INFO L225 Difference]: With dead ends: 661 [2020-09-24 14:54:57,267 INFO L226 Difference]: Without dead ends: 450 [2020-09-24 14:54:57,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-09-24 14:54:57,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-09-24 14:54:57,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 354. [2020-09-24 14:54:57,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-09-24 14:54:57,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 437 transitions. [2020-09-24 14:54:57,288 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 437 transitions. Word has length 200 [2020-09-24 14:54:57,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:57,288 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 437 transitions. [2020-09-24 14:54:57,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 14:54:57,289 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 437 transitions. [2020-09-24 14:54:57,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-09-24 14:54:57,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:57,291 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:57,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-24 14:54:57,291 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:57,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:57,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1093348544, now seen corresponding path program 6 times [2020-09-24 14:54:57,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:57,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534559255] [2020-09-24 14:54:57,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:57,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:57,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:57,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:57,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-24 14:54:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:57,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-09-24 14:54:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:57,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-09-24 14:54:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 6 proven. 1002 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:57,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534559255] [2020-09-24 14:54:57,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:57,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 14:54:57,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510139671] [2020-09-24 14:54:57,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 14:54:57,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:57,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 14:54:57,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-09-24 14:54:57,937 INFO L87 Difference]: Start difference. First operand 354 states and 437 transitions. Second operand 24 states. [2020-09-24 14:54:58,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:58,289 INFO L93 Difference]: Finished difference Result 830 states and 1002 transitions. [2020-09-24 14:54:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 14:54:58,290 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 205 [2020-09-24 14:54:58,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:58,294 INFO L225 Difference]: With dead ends: 830 [2020-09-24 14:54:58,294 INFO L226 Difference]: Without dead ends: 612 [2020-09-24 14:54:58,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-09-24 14:54:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-09-24 14:54:58,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 364. [2020-09-24 14:54:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-09-24 14:54:58,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 450 transitions. [2020-09-24 14:54:58,319 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 450 transitions. Word has length 205 [2020-09-24 14:54:58,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:58,319 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 450 transitions. [2020-09-24 14:54:58,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 14:54:58,320 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 450 transitions. [2020-09-24 14:54:58,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-09-24 14:54:58,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:58,322 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:58,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-09-24 14:54:58,322 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:58,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:58,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1191231474, now seen corresponding path program 6 times [2020-09-24 14:54:58,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:58,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926904890] [2020-09-24 14:54:58,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:58,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:58,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:58,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-24 14:54:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-09-24 14:54:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-09-24 14:54:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 7 proven. 964 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:59,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926904890] [2020-09-24 14:54:59,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:59,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 14:54:59,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873913880] [2020-09-24 14:54:59,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 14:54:59,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:59,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 14:54:59,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-09-24 14:54:59,145 INFO L87 Difference]: Start difference. First operand 364 states and 450 transitions. Second operand 24 states. [2020-09-24 14:55:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:00,417 INFO L93 Difference]: Finished difference Result 680 states and 852 transitions. [2020-09-24 14:55:00,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 14:55:00,418 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 205 [2020-09-24 14:55:00,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:00,421 INFO L225 Difference]: With dead ends: 680 [2020-09-24 14:55:00,421 INFO L226 Difference]: Without dead ends: 464 [2020-09-24 14:55:00,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-09-24 14:55:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-09-24 14:55:00,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 364. [2020-09-24 14:55:00,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-09-24 14:55:00,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 450 transitions. [2020-09-24 14:55:00,447 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 450 transitions. Word has length 205 [2020-09-24 14:55:00,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:00,448 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 450 transitions. [2020-09-24 14:55:00,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 14:55:00,448 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 450 transitions. [2020-09-24 14:55:00,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-09-24 14:55:00,450 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:00,450 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:00,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-09-24 14:55:00,451 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:00,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:00,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1719328312, now seen corresponding path program 7 times [2020-09-24 14:55:00,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:00,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809392693] [2020-09-24 14:55:00,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:00,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:00,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:00,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-09-24 14:55:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-09-24 14:55:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-09-24 14:55:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 6 proven. 1104 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:55:01,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809392693] [2020-09-24 14:55:01,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:01,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 14:55:01,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119514982] [2020-09-24 14:55:01,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 14:55:01,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:01,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 14:55:01,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-09-24 14:55:01,098 INFO L87 Difference]: Start difference. First operand 364 states and 450 transitions. Second operand 25 states. [2020-09-24 14:55:01,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:01,475 INFO L93 Difference]: Finished difference Result 857 states and 1035 transitions. [2020-09-24 14:55:01,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 14:55:01,476 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 210 [2020-09-24 14:55:01,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:01,479 INFO L225 Difference]: With dead ends: 857 [2020-09-24 14:55:01,480 INFO L226 Difference]: Without dead ends: 634 [2020-09-24 14:55:01,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-09-24 14:55:01,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-09-24 14:55:01,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 374. [2020-09-24 14:55:01,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-09-24 14:55:01,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 463 transitions. [2020-09-24 14:55:01,505 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 463 transitions. Word has length 210 [2020-09-24 14:55:01,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:01,505 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 463 transitions. [2020-09-24 14:55:01,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 14:55:01,505 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 463 transitions. [2020-09-24 14:55:01,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-09-24 14:55:01,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:01,508 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:01,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-09-24 14:55:01,508 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:01,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:01,508 INFO L82 PathProgramCache]: Analyzing trace with hash -291058966, now seen corresponding path program 7 times [2020-09-24 14:55:01,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:01,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480396766] [2020-09-24 14:55:01,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:02,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-09-24 14:55:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:02,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-09-24 14:55:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:02,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-09-24 14:55:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:02,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 7 proven. 1064 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:55:02,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480396766] [2020-09-24 14:55:02,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:02,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 14:55:02,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521768071] [2020-09-24 14:55:02,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 14:55:02,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:02,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 14:55:02,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-09-24 14:55:02,449 INFO L87 Difference]: Start difference. First operand 374 states and 463 transitions. Second operand 25 states. [2020-09-24 14:55:03,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:03,854 INFO L93 Difference]: Finished difference Result 699 states and 877 transitions. [2020-09-24 14:55:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 14:55:03,855 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 210 [2020-09-24 14:55:03,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:03,859 INFO L225 Difference]: With dead ends: 699 [2020-09-24 14:55:03,859 INFO L226 Difference]: Without dead ends: 478 [2020-09-24 14:55:03,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-09-24 14:55:03,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-09-24 14:55:03,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 374. [2020-09-24 14:55:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-09-24 14:55:03,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 463 transitions. [2020-09-24 14:55:03,894 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 463 transitions. Word has length 210 [2020-09-24 14:55:03,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:03,895 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 463 transitions. [2020-09-24 14:55:03,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 14:55:03,895 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 463 transitions. [2020-09-24 14:55:03,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-09-24 14:55:03,899 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:03,900 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:03,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-09-24 14:55:03,900 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:03,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:03,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1312616000, now seen corresponding path program 8 times [2020-09-24 14:55:03,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:03,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462255872] [2020-09-24 14:55:03,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:03,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:03,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:03,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:04,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-09-24 14:55:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:04,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-09-24 14:55:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:04,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-09-24 14:55:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 6 proven. 1211 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:55:04,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462255872] [2020-09-24 14:55:04,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:04,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 14:55:04,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139055589] [2020-09-24 14:55:04,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 14:55:04,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:04,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 14:55:04,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-09-24 14:55:04,689 INFO L87 Difference]: Start difference. First operand 374 states and 463 transitions. Second operand 26 states. [2020-09-24 14:55:05,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:05,043 INFO L93 Difference]: Finished difference Result 884 states and 1068 transitions. [2020-09-24 14:55:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 14:55:05,045 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 215 [2020-09-24 14:55:05,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:05,048 INFO L225 Difference]: With dead ends: 884 [2020-09-24 14:55:05,048 INFO L226 Difference]: Without dead ends: 656 [2020-09-24 14:55:05,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-09-24 14:55:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-09-24 14:55:05,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 384. [2020-09-24 14:55:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-09-24 14:55:05,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 476 transitions. [2020-09-24 14:55:05,076 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 476 transitions. Word has length 215 [2020-09-24 14:55:05,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:05,077 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 476 transitions. [2020-09-24 14:55:05,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 14:55:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 476 transitions. [2020-09-24 14:55:05,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-09-24 14:55:05,079 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:05,079 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:05,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-09-24 14:55:05,079 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:05,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:05,080 INFO L82 PathProgramCache]: Analyzing trace with hash -697771278, now seen corresponding path program 8 times [2020-09-24 14:55:05,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:05,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361732944] [2020-09-24 14:55:05,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-09-24 14:55:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-09-24 14:55:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-09-24 14:55:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 7 proven. 1169 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:55:06,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361732944] [2020-09-24 14:55:06,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:06,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 14:55:06,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935332236] [2020-09-24 14:55:06,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 14:55:06,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:06,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 14:55:06,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-09-24 14:55:06,045 INFO L87 Difference]: Start difference. First operand 384 states and 476 transitions. Second operand 26 states. [2020-09-24 14:55:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:07,584 INFO L93 Difference]: Finished difference Result 718 states and 902 transitions. [2020-09-24 14:55:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 14:55:07,585 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 215 [2020-09-24 14:55:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:07,587 INFO L225 Difference]: With dead ends: 718 [2020-09-24 14:55:07,587 INFO L226 Difference]: Without dead ends: 492 [2020-09-24 14:55:07,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-09-24 14:55:07,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-09-24 14:55:07,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 384. [2020-09-24 14:55:07,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-09-24 14:55:07,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 476 transitions. [2020-09-24 14:55:07,609 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 476 transitions. Word has length 215 [2020-09-24 14:55:07,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:07,609 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 476 transitions. [2020-09-24 14:55:07,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 14:55:07,610 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 476 transitions. [2020-09-24 14:55:07,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-09-24 14:55:07,612 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:07,612 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:07,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-09-24 14:55:07,612 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:07,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:07,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1256956728, now seen corresponding path program 9 times [2020-09-24 14:55:07,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:07,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288962619] [2020-09-24 14:55:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:07,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:07,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:07,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:08,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-09-24 14:55:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:08,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-24 14:55:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:08,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-09-24 14:55:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 6 proven. 1323 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:55:08,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288962619] [2020-09-24 14:55:08,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:08,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 14:55:08,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271571118] [2020-09-24 14:55:08,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 14:55:08,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:08,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 14:55:08,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-09-24 14:55:08,392 INFO L87 Difference]: Start difference. First operand 384 states and 476 transitions. Second operand 27 states. [2020-09-24 14:55:09,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:09,151 INFO L93 Difference]: Finished difference Result 911 states and 1101 transitions. [2020-09-24 14:55:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 14:55:09,152 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 220 [2020-09-24 14:55:09,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:09,156 INFO L225 Difference]: With dead ends: 911 [2020-09-24 14:55:09,156 INFO L226 Difference]: Without dead ends: 678 [2020-09-24 14:55:09,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-09-24 14:55:09,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2020-09-24 14:55:09,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 394. [2020-09-24 14:55:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-09-24 14:55:09,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 489 transitions. [2020-09-24 14:55:09,186 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 489 transitions. Word has length 220 [2020-09-24 14:55:09,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:09,186 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 489 transitions. [2020-09-24 14:55:09,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 14:55:09,186 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 489 transitions. [2020-09-24 14:55:09,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-09-24 14:55:09,188 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:09,189 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:09,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-09-24 14:55:09,189 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:09,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:09,189 INFO L82 PathProgramCache]: Analyzing trace with hash -753430550, now seen corresponding path program 9 times [2020-09-24 14:55:09,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:09,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584300793] [2020-09-24 14:55:09,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:09,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:09,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:09,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:10,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-09-24 14:55:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:10,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-24 14:55:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:10,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-09-24 14:55:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1316 backedges. 7 proven. 1279 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:55:10,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584300793] [2020-09-24 14:55:10,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:10,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 14:55:10,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205017641] [2020-09-24 14:55:10,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 14:55:10,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:10,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 14:55:10,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-09-24 14:55:10,212 INFO L87 Difference]: Start difference. First operand 394 states and 489 transitions. Second operand 27 states.