/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/fragtest_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:29:33,167 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-09-21 10:29:33,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:29:33,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:29:33,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:29:33,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:29:33,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:29:33,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:29:33,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:29:33,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:29:33,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:29:33,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:29:33,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:29:33,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:29:33,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:29:33,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:29:33,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:29:33,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:29:33,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:29:33,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:29:33,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:29:33,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:29:33,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:29:33,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:29:33,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:29:33,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:29:33,293 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 [2020-09-21 10:29:33,336 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:29:33,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:29:33,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:29:33,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:29:33,338 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:29:33,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:29:33,339 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:29:33,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:29:33,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:29:33,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:29:33,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:29:33,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:29:33,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:29:33,341 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:29:33,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:29:33,342 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:29:33,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:29:33,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:29:33,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:29:33,343 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:29:33,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:29:33,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:29:33,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:29:33,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:29:33,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:29:33,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:29:33,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:29:33,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:29:33,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:29:33,345 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:29:33,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:29:33,821 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:29:33,825 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:29:33,829 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:29:33,829 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:29:33,830 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2020-09-21 10:29:33,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/502603f70/ce95fd648030400fb3bc8e4a54d6bae2/FLAGe2cd6fbc4 [2020-09-21 10:29:34,426 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:29:34,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2020-09-21 10:29:34,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/502603f70/ce95fd648030400fb3bc8e4a54d6bae2/FLAGe2cd6fbc4 [2020-09-21 10:29:34,776 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/502603f70/ce95fd648030400fb3bc8e4a54d6bae2 [2020-09-21 10:29:34,788 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:29:34,793 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:29:34,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:29:34,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:29:34,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:29:34,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:29:34" (1/1) ... [2020-09-21 10:29:34,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@605628e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:34, skipping insertion in model container [2020-09-21 10:29:34,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:29:34" (1/1) ... [2020-09-21 10:29:34,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:29:34,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:29:35,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:29:35,072 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:29:35,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:29:35,112 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:29:35,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:35 WrapperNode [2020-09-21 10:29:35,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:29:35,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:29:35,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:29:35,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:29:35,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:35" (1/1) ... [2020-09-21 10:29:35,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:35" (1/1) ... [2020-09-21 10:29:35,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:35" (1/1) ... [2020-09-21 10:29:35,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:35" (1/1) ... [2020-09-21 10:29:35,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:35" (1/1) ... [2020-09-21 10:29:35,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:35" (1/1) ... [2020-09-21 10:29:35,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:35" (1/1) ... [2020-09-21 10:29:35,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:29:35,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:29:35,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:29:35,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:29:35,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:35" (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 [2020-09-21 10:29:35,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:29:35,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:29:35,309 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 10:29:35,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:29:35,310 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:29:35,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:29:35,310 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:29:35,310 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 10:29:35,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:29:35,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:29:35,311 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:29:35,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:29:35,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:29:35,602 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:29:35,603 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-21 10:29:35,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:29:35 BoogieIcfgContainer [2020-09-21 10:29:35,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:29:35,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:29:35,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:29:35,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:29:35,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:29:34" (1/3) ... [2020-09-21 10:29:35,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578d7796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:29:35, skipping insertion in model container [2020-09-21 10:29:35,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:35" (2/3) ... [2020-09-21 10:29:35,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578d7796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:29:35, skipping insertion in model container [2020-09-21 10:29:35,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:29:35" (3/3) ... [2020-09-21 10:29:35,631 INFO L109 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2020-09-21 10:29:35,641 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:29:35,651 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:29:35,672 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:29:35,702 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:29:35,702 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:29:35,703 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:29:35,703 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:29:35,703 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:29:35,703 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:29:35,703 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:29:35,703 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:29:35,723 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-21 10:29:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 10:29:35,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:35,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:35,733 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:35,741 INFO L82 PathProgramCache]: Analyzing trace with hash 317368997, now seen corresponding path program 1 times [2020-09-21 10:29:35,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:35,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306671965] [2020-09-21 10:29:35,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:35,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:35,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:29:35,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306671965] [2020-09-21 10:29:35,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:29:35,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 10:29:35,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403936314] [2020-09-21 10:29:35,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 10:29:35,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:35,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 10:29:35,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 10:29:35,911 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-09-21 10:29:35,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:35,942 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2020-09-21 10:29:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 10:29:35,944 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-09-21 10:29:35,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:35,954 INFO L225 Difference]: With dead ends: 47 [2020-09-21 10:29:35,955 INFO L226 Difference]: Without dead ends: 22 [2020-09-21 10:29:35,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 10:29:35,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-21 10:29:36,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-21 10:29:36,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-21 10:29:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-09-21 10:29:36,007 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2020-09-21 10:29:36,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:36,008 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-09-21 10:29:36,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 10:29:36,008 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-09-21 10:29:36,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 10:29:36,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:36,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:36,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:29:36,010 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:36,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:36,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1632722591, now seen corresponding path program 1 times [2020-09-21 10:29:36,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:36,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984152176] [2020-09-21 10:29:36,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:36,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:29:36,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984152176] [2020-09-21 10:29:36,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:29:36,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:29:36,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110275800] [2020-09-21 10:29:36,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:29:36,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:36,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:29:36,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:29:36,157 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-09-21 10:29:36,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:36,226 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-09-21 10:29:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:29:36,227 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-21 10:29:36,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:36,228 INFO L225 Difference]: With dead ends: 31 [2020-09-21 10:29:36,228 INFO L226 Difference]: Without dead ends: 29 [2020-09-21 10:29:36,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:29:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-21 10:29:36,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-09-21 10:29:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 10:29:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-09-21 10:29:36,239 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 17 [2020-09-21 10:29:36,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:36,239 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-09-21 10:29:36,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:29:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-09-21 10:29:36,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:29:36,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:36,241 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:36,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:29:36,242 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:36,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:36,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1401298672, now seen corresponding path program 1 times [2020-09-21 10:29:36,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:36,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804704085] [2020-09-21 10:29:36,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:36,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:36,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 10:29:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:29:36,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804704085] [2020-09-21 10:29:36,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:29:36,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:29:36,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922746233] [2020-09-21 10:29:36,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:29:36,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:36,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:29:36,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:29:36,349 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-09-21 10:29:36,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:36,446 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-09-21 10:29:36,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:29:36,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-21 10:29:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:36,451 INFO L225 Difference]: With dead ends: 49 [2020-09-21 10:29:36,451 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 10:29:36,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:29:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 10:29:36,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-09-21 10:29:36,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 10:29:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-09-21 10:29:36,471 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2020-09-21 10:29:36,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:36,472 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-09-21 10:29:36,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:29:36,472 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-09-21 10:29:36,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 10:29:36,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:36,474 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:36,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:29:36,475 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:36,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:36,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1107622837, now seen corresponding path program 1 times [2020-09-21 10:29:36,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:36,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197555772] [2020-09-21 10:29:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:36,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:36,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 10:29:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:29:36,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197555772] [2020-09-21 10:29:36,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:36,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:29:36,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746197408] [2020-09-21 10:29:36,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:29:36,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:36,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:29:36,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:29:36,613 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 6 states. [2020-09-21 10:29:36,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:36,710 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-09-21 10:29:36,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:29:36,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-09-21 10:29:36,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:36,712 INFO L225 Difference]: With dead ends: 55 [2020-09-21 10:29:36,712 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 10:29:36,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:29:36,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 10:29:36,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2020-09-21 10:29:36,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 10:29:36,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-09-21 10:29:36,720 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-09-21 10:29:36,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:36,721 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-09-21 10:29:36,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:29:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-09-21 10:29:36,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 10:29:36,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:36,722 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:36,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:29:36,723 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:36,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:36,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1590427366, now seen corresponding path program 2 times [2020-09-21 10:29:36,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:36,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679885359] [2020-09-21 10:29:36,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:36,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:36,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-21 10:29:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:29:36,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679885359] [2020-09-21 10:29:36,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:36,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:29:36,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120179732] [2020-09-21 10:29:36,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:29:36,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:36,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:29:36,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:29:36,833 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 7 states. [2020-09-21 10:29:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:36,921 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-09-21 10:29:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:29:36,922 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-21 10:29:36,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:36,923 INFO L225 Difference]: With dead ends: 47 [2020-09-21 10:29:36,923 INFO L226 Difference]: Without dead ends: 45 [2020-09-21 10:29:36,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:29:36,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-21 10:29:36,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-09-21 10:29:36,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 10:29:36,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-09-21 10:29:36,933 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 29 [2020-09-21 10:29:36,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:36,933 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-09-21 10:29:36,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:29:36,934 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-09-21 10:29:36,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 10:29:36,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:36,937 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:36,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:29:36,937 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:36,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:36,938 INFO L82 PathProgramCache]: Analyzing trace with hash -30298372, now seen corresponding path program 3 times [2020-09-21 10:29:36,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:36,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920289354] [2020-09-21 10:29:36,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-21 10:29:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-21 10:29:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:29:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-21 10:29:37,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920289354] [2020-09-21 10:29:37,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:37,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:29:37,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285292966] [2020-09-21 10:29:37,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:29:37,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:37,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:29:37,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:29:37,103 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2020-09-21 10:29:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:37,247 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-09-21 10:29:37,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:29:37,248 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-09-21 10:29:37,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:37,250 INFO L225 Difference]: With dead ends: 83 [2020-09-21 10:29:37,251 INFO L226 Difference]: Without dead ends: 58 [2020-09-21 10:29:37,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:29:37,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-21 10:29:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2020-09-21 10:29:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 10:29:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-09-21 10:29:37,262 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 45 [2020-09-21 10:29:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:37,262 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-09-21 10:29:37,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:29:37,263 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-09-21 10:29:37,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-21 10:29:37,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:37,264 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:37,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:29:37,265 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:37,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:37,265 INFO L82 PathProgramCache]: Analyzing trace with hash 130155809, now seen corresponding path program 4 times [2020-09-21 10:29:37,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:37,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151743927] [2020-09-21 10:29:37,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 10:29:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 10:29:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:29:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-21 10:29:37,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151743927] [2020-09-21 10:29:37,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:37,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:29:37,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813073734] [2020-09-21 10:29:37,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:29:37,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:37,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:29:37,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:29:37,412 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 10 states. [2020-09-21 10:29:37,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:37,556 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-09-21 10:29:37,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:29:37,556 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-09-21 10:29:37,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:37,558 INFO L225 Difference]: With dead ends: 87 [2020-09-21 10:29:37,558 INFO L226 Difference]: Without dead ends: 64 [2020-09-21 10:29:37,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:29:37,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-21 10:29:37,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-09-21 10:29:37,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-21 10:29:37,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-09-21 10:29:37,567 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 47 [2020-09-21 10:29:37,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:37,567 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-09-21 10:29:37,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:29:37,567 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-09-21 10:29:37,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-21 10:29:37,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:37,569 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:37,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:29:37,569 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:37,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:37,570 INFO L82 PathProgramCache]: Analyzing trace with hash -292198906, now seen corresponding path program 5 times [2020-09-21 10:29:37,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:37,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556401526] [2020-09-21 10:29:37,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 10:29:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 10:29:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:29:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-21 10:29:37,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556401526] [2020-09-21 10:29:37,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:37,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:29:37,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815426460] [2020-09-21 10:29:37,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:29:37,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:37,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:29:37,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:29:37,703 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 9 states. [2020-09-21 10:29:37,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:37,783 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-09-21 10:29:37,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:29:37,783 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-21 10:29:37,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:37,785 INFO L225 Difference]: With dead ends: 63 [2020-09-21 10:29:37,785 INFO L226 Difference]: Without dead ends: 61 [2020-09-21 10:29:37,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:29:37,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-21 10:29:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-09-21 10:29:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-21 10:29:37,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-09-21 10:29:37,794 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 49 [2020-09-21 10:29:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:37,794 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-09-21 10:29:37,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:29:37,795 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-09-21 10:29:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-21 10:29:37,796 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:37,796 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:37,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:29:37,797 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:37,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:37,797 INFO L82 PathProgramCache]: Analyzing trace with hash 551795688, now seen corresponding path program 6 times [2020-09-21 10:29:37,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:37,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594617679] [2020-09-21 10:29:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 10:29:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 10:29:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:29:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 10:29:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 10:29:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 60 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-21 10:29:37,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594617679] [2020-09-21 10:29:37,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:37,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 10:29:37,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727991153] [2020-09-21 10:29:37,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:29:37,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:37,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:29:37,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:29:37,983 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 13 states. [2020-09-21 10:29:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:38,149 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2020-09-21 10:29:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:29:38,150 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-09-21 10:29:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:38,151 INFO L225 Difference]: With dead ends: 115 [2020-09-21 10:29:38,152 INFO L226 Difference]: Without dead ends: 82 [2020-09-21 10:29:38,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:29:38,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-21 10:29:38,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2020-09-21 10:29:38,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-21 10:29:38,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-09-21 10:29:38,161 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 65 [2020-09-21 10:29:38,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:38,161 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-09-21 10:29:38,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:29:38,161 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-09-21 10:29:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-21 10:29:38,163 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:38,163 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:38,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:29:38,163 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:38,164 INFO L82 PathProgramCache]: Analyzing trace with hash -150434419, now seen corresponding path program 7 times [2020-09-21 10:29:38,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:38,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004366752] [2020-09-21 10:29:38,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:38,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:38,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 10:29:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:38,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 10:29:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:38,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 10:29:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:38,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:29:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:38,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-21 10:29:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-21 10:29:38,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004366752] [2020-09-21 10:29:38,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:38,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 10:29:38,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280112462] [2020-09-21 10:29:38,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 10:29:38,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:38,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 10:29:38,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:29:38,339 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 14 states. [2020-09-21 10:29:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:38,577 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2020-09-21 10:29:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:29:38,577 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-09-21 10:29:38,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:38,578 INFO L225 Difference]: With dead ends: 119 [2020-09-21 10:29:38,578 INFO L226 Difference]: Without dead ends: 88 [2020-09-21 10:29:38,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-09-21 10:29:38,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-21 10:29:38,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2020-09-21 10:29:38,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 10:29:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-09-21 10:29:38,588 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 67 [2020-09-21 10:29:38,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:38,588 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-09-21 10:29:38,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 10:29:38,588 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-09-21 10:29:38,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-21 10:29:38,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:38,590 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:38,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:29:38,590 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:38,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:38,590 INFO L82 PathProgramCache]: Analyzing trace with hash -683701774, now seen corresponding path program 8 times [2020-09-21 10:29:38,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:38,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121058848] [2020-09-21 10:29:38,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:38,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:38,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-21 10:29:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:38,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:29:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:38,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:29:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:38,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 10:29:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:38,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 10:29:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 52 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-21 10:29:38,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121058848] [2020-09-21 10:29:38,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:38,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 10:29:38,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472789364] [2020-09-21 10:29:38,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:29:38,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:38,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:29:38,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:29:38,753 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 11 states. [2020-09-21 10:29:38,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:38,847 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-09-21 10:29:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:29:38,848 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-09-21 10:29:38,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:38,849 INFO L225 Difference]: With dead ends: 79 [2020-09-21 10:29:38,849 INFO L226 Difference]: Without dead ends: 77 [2020-09-21 10:29:38,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:29:38,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-21 10:29:38,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-09-21 10:29:38,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-21 10:29:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-09-21 10:29:38,857 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 69 [2020-09-21 10:29:38,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:38,858 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-09-21 10:29:38,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:29:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-09-21 10:29:38,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-21 10:29:38,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:38,860 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:38,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:29:38,860 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:38,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:38,860 INFO L82 PathProgramCache]: Analyzing trace with hash 192972756, now seen corresponding path program 9 times [2020-09-21 10:29:38,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:38,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642718616] [2020-09-21 10:29:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:39,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-21 10:29:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:29:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:29:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 10:29:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 10:29:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:29:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 10:29:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 112 proven. 42 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-09-21 10:29:39,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642718616] [2020-09-21 10:29:39,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:39,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 10:29:39,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119821233] [2020-09-21 10:29:39,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 10:29:39,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:39,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 10:29:39,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:29:39,106 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 17 states. [2020-09-21 10:29:39,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:39,347 INFO L93 Difference]: Finished difference Result 147 states and 174 transitions. [2020-09-21 10:29:39,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:29:39,348 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-09-21 10:29:39,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:39,349 INFO L225 Difference]: With dead ends: 147 [2020-09-21 10:29:39,349 INFO L226 Difference]: Without dead ends: 106 [2020-09-21 10:29:39,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-09-21 10:29:39,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-21 10:29:39,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2020-09-21 10:29:39,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-21 10:29:39,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-09-21 10:29:39,357 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 85 [2020-09-21 10:29:39,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:39,358 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-09-21 10:29:39,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 10:29:39,358 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-09-21 10:29:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-21 10:29:39,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:39,359 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:39,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:29:39,360 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:39,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:39,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1722356985, now seen corresponding path program 10 times [2020-09-21 10:29:39,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:39,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671633233] [2020-09-21 10:29:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 10:29:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:29:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:29:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 10:29:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-21 10:29:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-21 10:29:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-21 10:29:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 112 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-09-21 10:29:39,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671633233] [2020-09-21 10:29:39,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:39,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-21 10:29:39,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715260919] [2020-09-21 10:29:39,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-21 10:29:39,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:39,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-21 10:29:39,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:29:39,640 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 18 states. [2020-09-21 10:29:39,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:39,946 INFO L93 Difference]: Finished difference Result 151 states and 181 transitions. [2020-09-21 10:29:39,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 10:29:39,947 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2020-09-21 10:29:39,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:39,948 INFO L225 Difference]: With dead ends: 151 [2020-09-21 10:29:39,948 INFO L226 Difference]: Without dead ends: 112 [2020-09-21 10:29:39,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2020-09-21 10:29:39,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-21 10:29:39,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-09-21 10:29:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-21 10:29:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-09-21 10:29:39,962 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 87 [2020-09-21 10:29:39,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:39,962 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-09-21 10:29:39,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-21 10:29:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-09-21 10:29:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-21 10:29:39,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:39,965 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:39,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:29:39,965 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:39,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:39,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1713181474, now seen corresponding path program 11 times [2020-09-21 10:29:39,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:39,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427753976] [2020-09-21 10:29:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 10:29:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:29:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 10:29:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 10:29:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 10:29:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:29:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-21 10:29:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 86 proven. 98 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-09-21 10:29:40,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427753976] [2020-09-21 10:29:40,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:40,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 10:29:40,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531533961] [2020-09-21 10:29:40,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:29:40,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:40,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:29:40,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:29:40,163 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 13 states. [2020-09-21 10:29:40,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:40,293 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2020-09-21 10:29:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:29:40,293 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 89 [2020-09-21 10:29:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:40,295 INFO L225 Difference]: With dead ends: 95 [2020-09-21 10:29:40,295 INFO L226 Difference]: Without dead ends: 93 [2020-09-21 10:29:40,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:29:40,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-21 10:29:40,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-09-21 10:29:40,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-21 10:29:40,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2020-09-21 10:29:40,321 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 89 [2020-09-21 10:29:40,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:40,323 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2020-09-21 10:29:40,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:29:40,323 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2020-09-21 10:29:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-09-21 10:29:40,324 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:40,324 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:40,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:29:40,324 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:40,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:40,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1950838080, now seen corresponding path program 12 times [2020-09-21 10:29:40,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:40,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369034037] [2020-09-21 10:29:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 10:29:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:29:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 10:29:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 10:29:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 10:29:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:29:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-21 10:29:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 10:29:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:29:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 180 proven. 72 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-09-21 10:29:40,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369034037] [2020-09-21 10:29:40,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:40,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 10:29:40,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326351686] [2020-09-21 10:29:40,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 10:29:40,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:40,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 10:29:40,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2020-09-21 10:29:40,690 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 21 states. [2020-09-21 10:29:41,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:41,046 INFO L93 Difference]: Finished difference Result 179 states and 213 transitions. [2020-09-21 10:29:41,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 10:29:41,047 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2020-09-21 10:29:41,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:41,048 INFO L225 Difference]: With dead ends: 179 [2020-09-21 10:29:41,048 INFO L226 Difference]: Without dead ends: 130 [2020-09-21 10:29:41,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-21 10:29:41,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-21 10:29:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 94. [2020-09-21 10:29:41,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-21 10:29:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2020-09-21 10:29:41,059 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 105 [2020-09-21 10:29:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:41,059 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2020-09-21 10:29:41,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 10:29:41,060 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2020-09-21 10:29:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-21 10:29:41,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:41,064 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:41,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:29:41,064 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:41,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:41,065 INFO L82 PathProgramCache]: Analyzing trace with hash -734782619, now seen corresponding path program 13 times [2020-09-21 10:29:41,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:41,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205971166] [2020-09-21 10:29:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:41,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:41,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 10:29:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:41,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 10:29:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:41,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:29:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:41,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-21 10:29:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:41,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-21 10:29:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:41,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 10:29:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:41,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-21 10:29:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:41,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-21 10:29:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:41,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-09-21 10:29:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 180 proven. 90 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-09-21 10:29:41,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205971166] [2020-09-21 10:29:41,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:41,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 10:29:41,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138881426] [2020-09-21 10:29:41,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 10:29:41,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:41,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 10:29:41,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:29:41,433 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand 22 states. [2020-09-21 10:29:41,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:41,891 INFO L93 Difference]: Finished difference Result 183 states and 220 transitions. [2020-09-21 10:29:41,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 10:29:41,892 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-09-21 10:29:41,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:41,894 INFO L225 Difference]: With dead ends: 183 [2020-09-21 10:29:41,894 INFO L226 Difference]: Without dead ends: 136 [2020-09-21 10:29:41,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=686, Unknown=0, NotChecked=0, Total=992 [2020-09-21 10:29:41,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-21 10:29:41,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2020-09-21 10:29:41,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-21 10:29:41,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2020-09-21 10:29:41,906 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 107 [2020-09-21 10:29:41,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:41,906 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2020-09-21 10:29:41,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 10:29:41,907 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2020-09-21 10:29:41,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-21 10:29:41,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:41,909 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:41,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 10:29:41,910 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:41,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:41,910 INFO L82 PathProgramCache]: Analyzing trace with hash -336589110, now seen corresponding path program 14 times [2020-09-21 10:29:41,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:41,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170243157] [2020-09-21 10:29:41,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:29:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:29:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 10:29:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 10:29:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:29:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 10:29:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-21 10:29:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-21 10:29:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-21 10:29:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 128 proven. 162 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-09-21 10:29:42,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170243157] [2020-09-21 10:29:42,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:42,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 10:29:42,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51929640] [2020-09-21 10:29:42,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 10:29:42,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:42,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 10:29:42,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:29:42,188 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 15 states. [2020-09-21 10:29:42,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:42,379 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-09-21 10:29:42,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:29:42,380 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 109 [2020-09-21 10:29:42,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:42,382 INFO L225 Difference]: With dead ends: 111 [2020-09-21 10:29:42,382 INFO L226 Difference]: Without dead ends: 109 [2020-09-21 10:29:42,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:29:42,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-21 10:29:42,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-09-21 10:29:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-21 10:29:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2020-09-21 10:29:42,392 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 109 [2020-09-21 10:29:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:42,392 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2020-09-21 10:29:42,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 10:29:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2020-09-21 10:29:42,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-09-21 10:29:42,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:42,396 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:42,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 10:29:42,396 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:42,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:42,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1711037612, now seen corresponding path program 15 times [2020-09-21 10:29:42,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:42,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882709051] [2020-09-21 10:29:42,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:29:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:29:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 10:29:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 10:29:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:29:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 10:29:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-21 10:29:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-21 10:29:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-21 10:29:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-21 10:29:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-21 10:29:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 264 proven. 110 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-09-21 10:29:42,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882709051] [2020-09-21 10:29:42,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:42,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-21 10:29:42,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068383636] [2020-09-21 10:29:42,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-21 10:29:42,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:42,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-21 10:29:42,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-09-21 10:29:42,868 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand 25 states. [2020-09-21 10:29:43,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:43,280 INFO L93 Difference]: Finished difference Result 211 states and 252 transitions. [2020-09-21 10:29:43,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 10:29:43,281 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 125 [2020-09-21 10:29:43,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:43,283 INFO L225 Difference]: With dead ends: 211 [2020-09-21 10:29:43,283 INFO L226 Difference]: Without dead ends: 154 [2020-09-21 10:29:43,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2020-09-21 10:29:43,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-21 10:29:43,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 110. [2020-09-21 10:29:43,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-21 10:29:43,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2020-09-21 10:29:43,292 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 125 [2020-09-21 10:29:43,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:43,293 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2020-09-21 10:29:43,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-21 10:29:43,293 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2020-09-21 10:29:43,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-21 10:29:43,295 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:43,296 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:43,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 10:29:43,296 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:43,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:43,296 INFO L82 PathProgramCache]: Analyzing trace with hash 66724049, now seen corresponding path program 16 times [2020-09-21 10:29:43,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:43,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369278071] [2020-09-21 10:29:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:43,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:43,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:29:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:43,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:29:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:43,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 10:29:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:43,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-21 10:29:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:43,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-21 10:29:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:43,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-21 10:29:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:43,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-21 10:29:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:43,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-21 10:29:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:43,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-09-21 10:29:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:43,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-21 10:29:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:43,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-21 10:29:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 264 proven. 132 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-09-21 10:29:43,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369278071] [2020-09-21 10:29:43,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:43,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-21 10:29:43,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79285897] [2020-09-21 10:29:43,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-21 10:29:43,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:43,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-21 10:29:43,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2020-09-21 10:29:43,766 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand 26 states. [2020-09-21 10:29:44,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:44,252 INFO L93 Difference]: Finished difference Result 215 states and 259 transitions. [2020-09-21 10:29:44,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-21 10:29:44,252 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-09-21 10:29:44,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:44,256 INFO L225 Difference]: With dead ends: 215 [2020-09-21 10:29:44,256 INFO L226 Difference]: Without dead ends: 160 [2020-09-21 10:29:44,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=427, Invalid=979, Unknown=0, NotChecked=0, Total=1406 [2020-09-21 10:29:44,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-21 10:29:44,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2020-09-21 10:29:44,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-21 10:29:44,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2020-09-21 10:29:44,266 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 127 [2020-09-21 10:29:44,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:44,267 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2020-09-21 10:29:44,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-21 10:29:44,267 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2020-09-21 10:29:44,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-09-21 10:29:44,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:44,269 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:44,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 10:29:44,269 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:44,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:44,270 INFO L82 PathProgramCache]: Analyzing trace with hash 429354934, now seen corresponding path program 17 times [2020-09-21 10:29:44,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:44,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156989709] [2020-09-21 10:29:44,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:44,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:44,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:29:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:44,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 10:29:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:44,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 10:29:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:44,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 10:29:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:44,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:29:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:44,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-21 10:29:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:44,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 10:29:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:44,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:29:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:44,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-21 10:29:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:44,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-09-21 10:29:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:44,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-21 10:29:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 178 proven. 242 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-09-21 10:29:44,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156989709] [2020-09-21 10:29:44,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:44,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 10:29:44,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534746358] [2020-09-21 10:29:44,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 10:29:44,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:44,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 10:29:44,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:29:44,589 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand 17 states. [2020-09-21 10:29:44,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:44,740 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2020-09-21 10:29:44,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 10:29:44,741 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 129 [2020-09-21 10:29:44,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:44,743 INFO L225 Difference]: With dead ends: 127 [2020-09-21 10:29:44,743 INFO L226 Difference]: Without dead ends: 125 [2020-09-21 10:29:44,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:29:44,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-21 10:29:44,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-09-21 10:29:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-21 10:29:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2020-09-21 10:29:44,753 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 129 [2020-09-21 10:29:44,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:44,753 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2020-09-21 10:29:44,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 10:29:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2020-09-21 10:29:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-21 10:29:44,755 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:44,755 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:44,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 10:29:44,756 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:44,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1971086744, now seen corresponding path program 18 times [2020-09-21 10:29:44,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:44,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875680824] [2020-09-21 10:29:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:45,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:45,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:29:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:45,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 10:29:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:45,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 10:29:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:45,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 10:29:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:45,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:29:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:45,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-21 10:29:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:45,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 10:29:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:45,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:29:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:45,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-21 10:29:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:45,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-09-21 10:29:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:45,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-21 10:29:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:45,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-09-21 10:29:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:45,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-21 10:29:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 364 proven. 156 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-09-21 10:29:45,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875680824] [2020-09-21 10:29:45,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:45,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-21 10:29:45,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329841436] [2020-09-21 10:29:45,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-21 10:29:45,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:45,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-21 10:29:45,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2020-09-21 10:29:45,275 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 29 states. [2020-09-21 10:29:45,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:45,871 INFO L93 Difference]: Finished difference Result 243 states and 291 transitions. [2020-09-21 10:29:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-21 10:29:45,871 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 145 [2020-09-21 10:29:45,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:45,873 INFO L225 Difference]: With dead ends: 243 [2020-09-21 10:29:45,873 INFO L226 Difference]: Without dead ends: 178 [2020-09-21 10:29:45,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=510, Invalid=1212, Unknown=0, NotChecked=0, Total=1722 [2020-09-21 10:29:45,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-21 10:29:45,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 126. [2020-09-21 10:29:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-21 10:29:45,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2020-09-21 10:29:45,883 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 145 [2020-09-21 10:29:45,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:45,883 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2020-09-21 10:29:45,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-21 10:29:45,883 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2020-09-21 10:29:45,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-09-21 10:29:45,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:45,885 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:45,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 10:29:45,886 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:45,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:45,886 INFO L82 PathProgramCache]: Analyzing trace with hash 554411325, now seen corresponding path program 19 times [2020-09-21 10:29:45,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:45,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469040287] [2020-09-21 10:29:45,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:46,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:46,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 10:29:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:46,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:29:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:46,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-21 10:29:46,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:46,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-21 10:29:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:46,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 10:29:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:46,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-21 10:29:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:46,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-21 10:29:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:46,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-09-21 10:29:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:46,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-21 10:29:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:46,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-09-21 10:29:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:46,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-09-21 10:29:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:46,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-21 10:29:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:46,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-09-21 10:29:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 364 proven. 182 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-09-21 10:29:46,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469040287] [2020-09-21 10:29:46,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:46,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-21 10:29:46,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890421098] [2020-09-21 10:29:46,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-21 10:29:46,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:46,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-21 10:29:46,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2020-09-21 10:29:46,472 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand 30 states. [2020-09-21 10:29:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:47,153 INFO L93 Difference]: Finished difference Result 247 states and 298 transitions. [2020-09-21 10:29:47,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-21 10:29:47,154 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 147 [2020-09-21 10:29:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:47,155 INFO L225 Difference]: With dead ends: 247 [2020-09-21 10:29:47,156 INFO L226 Difference]: Without dead ends: 184 [2020-09-21 10:29:47,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=568, Invalid=1324, Unknown=0, NotChecked=0, Total=1892 [2020-09-21 10:29:47,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-21 10:29:47,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 128. [2020-09-21 10:29:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-09-21 10:29:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2020-09-21 10:29:47,165 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 147 [2020-09-21 10:29:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:47,166 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2020-09-21 10:29:47,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-21 10:29:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2020-09-21 10:29:47,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-21 10:29:47,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:47,168 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:47,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 10:29:47,168 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:47,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:47,168 INFO L82 PathProgramCache]: Analyzing trace with hash 633966498, now seen corresponding path program 20 times [2020-09-21 10:29:47,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:47,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848019564] [2020-09-21 10:29:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:47,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:47,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:29:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:47,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 10:29:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:47,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 10:29:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:47,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:29:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:47,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 10:29:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:47,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-21 10:29:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:47,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-21 10:29:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:47,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-21 10:29:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:47,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-21 10:29:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:47,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-21 10:29:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:47,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-09-21 10:29:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:47,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-09-21 10:29:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:47,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-21 10:29:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 236 proven. 338 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-09-21 10:29:47,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848019564] [2020-09-21 10:29:47,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:47,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 10:29:47,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458565350] [2020-09-21 10:29:47,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 10:29:47,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:47,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 10:29:47,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:29:47,498 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand 19 states. [2020-09-21 10:29:47,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:47,649 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-09-21 10:29:47,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 10:29:47,649 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 149 [2020-09-21 10:29:47,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:47,651 INFO L225 Difference]: With dead ends: 143 [2020-09-21 10:29:47,651 INFO L226 Difference]: Without dead ends: 141 [2020-09-21 10:29:47,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2020-09-21 10:29:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-21 10:29:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-09-21 10:29:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-21 10:29:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 150 transitions. [2020-09-21 10:29:47,660 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 150 transitions. Word has length 149 [2020-09-21 10:29:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:47,660 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 150 transitions. [2020-09-21 10:29:47,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 10:29:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 150 transitions. [2020-09-21 10:29:47,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-09-21 10:29:47,662 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:47,663 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:47,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 10:29:47,663 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:47,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:47,663 INFO L82 PathProgramCache]: Analyzing trace with hash -869716604, now seen corresponding path program 21 times [2020-09-21 10:29:47,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:47,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935839825] [2020-09-21 10:29:47,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:48,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:48,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:29:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:48,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 10:29:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:48,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 10:29:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:48,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:29:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:48,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 10:29:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:48,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-21 10:29:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:48,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-21 10:29:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:48,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-21 10:29:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:48,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-21 10:29:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:48,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-21 10:29:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:48,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-09-21 10:29:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:48,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-09-21 10:29:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:48,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-21 10:29:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:48,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-09-21 10:29:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:48,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-09-21 10:29:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 480 proven. 210 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-09-21 10:29:48,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935839825] [2020-09-21 10:29:48,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:48,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-21 10:29:48,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540695500] [2020-09-21 10:29:48,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-21 10:29:48,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:48,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-21 10:29:48,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 10:29:48,348 INFO L87 Difference]: Start difference. First operand 140 states and 150 transitions. Second operand 33 states. [2020-09-21 10:29:49,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:49,093 INFO L93 Difference]: Finished difference Result 275 states and 330 transitions. [2020-09-21 10:29:49,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-21 10:29:49,094 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 165 [2020-09-21 10:29:49,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:49,096 INFO L225 Difference]: With dead ends: 275 [2020-09-21 10:29:49,096 INFO L226 Difference]: Without dead ends: 202 [2020-09-21 10:29:49,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=663, Invalid=1593, Unknown=0, NotChecked=0, Total=2256 [2020-09-21 10:29:49,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-21 10:29:49,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 142. [2020-09-21 10:29:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-21 10:29:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 152 transitions. [2020-09-21 10:29:49,111 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 152 transitions. Word has length 165 [2020-09-21 10:29:49,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:49,111 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 152 transitions. [2020-09-21 10:29:49,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-21 10:29:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 152 transitions. [2020-09-21 10:29:49,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-09-21 10:29:49,114 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:49,115 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:49,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 10:29:49,115 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:49,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:49,115 INFO L82 PathProgramCache]: Analyzing trace with hash -583456599, now seen corresponding path program 22 times [2020-09-21 10:29:49,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:49,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273857776] [2020-09-21 10:29:49,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:49,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:49,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:49,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:29:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:49,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 10:29:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:49,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-21 10:29:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:49,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-21 10:29:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:49,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-21 10:29:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:49,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-21 10:29:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:49,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-21 10:29:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:49,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-09-21 10:29:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:49,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-21 10:29:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:49,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-21 10:29:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:49,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-09-21 10:29:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:49,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-09-21 10:29:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:49,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-21 10:29:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:49,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-21 10:29:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:49,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-09-21 10:29:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 480 proven. 240 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-09-21 10:29:49,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273857776] [2020-09-21 10:29:49,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:49,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-21 10:29:49,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479104966] [2020-09-21 10:29:49,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-21 10:29:49,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:49,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-21 10:29:49,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 10:29:49,871 INFO L87 Difference]: Start difference. First operand 142 states and 152 transitions. Second operand 34 states. [2020-09-21 10:29:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:50,642 INFO L93 Difference]: Finished difference Result 279 states and 337 transitions. [2020-09-21 10:29:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-21 10:29:50,642 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 167 [2020-09-21 10:29:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:50,644 INFO L225 Difference]: With dead ends: 279 [2020-09-21 10:29:50,644 INFO L226 Difference]: Without dead ends: 208 [2020-09-21 10:29:50,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=729, Invalid=1721, Unknown=0, NotChecked=0, Total=2450 [2020-09-21 10:29:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-21 10:29:50,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 144. [2020-09-21 10:29:50,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-21 10:29:50,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2020-09-21 10:29:50,655 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 167 [2020-09-21 10:29:50,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:50,655 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2020-09-21 10:29:50,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-21 10:29:50,655 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2020-09-21 10:29:50,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-21 10:29:50,657 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:50,657 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:50,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 10:29:50,657 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:50,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:50,658 INFO L82 PathProgramCache]: Analyzing trace with hash -365498738, now seen corresponding path program 23 times [2020-09-21 10:29:50,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:50,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567189715] [2020-09-21 10:29:50,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:51,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:51,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 10:29:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:51,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 10:29:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:51,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 10:29:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:51,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:29:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:51,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-21 10:29:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:51,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 10:29:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:51,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:29:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:51,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-21 10:29:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:51,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-09-21 10:29:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:51,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-21 10:29:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:51,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-09-21 10:29:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:51,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-21 10:29:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:51,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-09-21 10:29:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:51,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-09-21 10:29:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:51,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-09-21 10:29:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 302 proven. 450 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-09-21 10:29:51,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567189715] [2020-09-21 10:29:51,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:51,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 10:29:51,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062026468] [2020-09-21 10:29:51,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 10:29:51,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:51,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 10:29:51,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-09-21 10:29:51,084 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand 21 states. [2020-09-21 10:29:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:51,268 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-09-21 10:29:51,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 10:29:51,268 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 169 [2020-09-21 10:29:51,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:51,270 INFO L225 Difference]: With dead ends: 159 [2020-09-21 10:29:51,271 INFO L226 Difference]: Without dead ends: 157 [2020-09-21 10:29:51,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:29:51,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-21 10:29:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-09-21 10:29:51,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-21 10:29:51,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 167 transitions. [2020-09-21 10:29:51,288 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 167 transitions. Word has length 169 [2020-09-21 10:29:51,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:51,289 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 167 transitions. [2020-09-21 10:29:51,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 10:29:51,289 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 167 transitions. [2020-09-21 10:29:51,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-09-21 10:29:51,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:51,293 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:51,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 10:29:51,293 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:51,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:51,294 INFO L82 PathProgramCache]: Analyzing trace with hash -760007568, now seen corresponding path program 24 times [2020-09-21 10:29:51,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:51,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912569951] [2020-09-21 10:29:51,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 10:29:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 10:29:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 10:29:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:29:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-21 10:29:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 10:29:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:29:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-21 10:29:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-09-21 10:29:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-21 10:29:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-09-21 10:29:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-21 10:29:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-09-21 10:29:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-09-21 10:29:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-09-21 10:29:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-09-21 10:29:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-09-21 10:29:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 612 proven. 272 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-09-21 10:29:52,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912569951] [2020-09-21 10:29:52,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:52,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-21 10:29:52,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60464881] [2020-09-21 10:29:52,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-21 10:29:52,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:52,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-21 10:29:52,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 10:29:52,121 INFO L87 Difference]: Start difference. First operand 156 states and 167 transitions. Second operand 37 states. [2020-09-21 10:29:53,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:53,107 INFO L93 Difference]: Finished difference Result 307 states and 369 transitions. [2020-09-21 10:29:53,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-21 10:29:53,109 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 185 [2020-09-21 10:29:53,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:53,111 INFO L225 Difference]: With dead ends: 307 [2020-09-21 10:29:53,111 INFO L226 Difference]: Without dead ends: 226 [2020-09-21 10:29:53,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=836, Invalid=2026, Unknown=0, NotChecked=0, Total=2862 [2020-09-21 10:29:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-09-21 10:29:53,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 158. [2020-09-21 10:29:53,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-21 10:29:53,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2020-09-21 10:29:53,122 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 185 [2020-09-21 10:29:53,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:53,122 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2020-09-21 10:29:53,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-21 10:29:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2020-09-21 10:29:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-09-21 10:29:53,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:53,125 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:53,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 10:29:53,125 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:53,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:53,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1861014763, now seen corresponding path program 25 times [2020-09-21 10:29:53,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:53,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066686670] [2020-09-21 10:29:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:29:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-21 10:29:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-21 10:29:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 10:29:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-21 10:29:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-21 10:29:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-09-21 10:29:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-21 10:29:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-09-21 10:29:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-09-21 10:29:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-21 10:29:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-09-21 10:29:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-09-21 10:29:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-21 10:29:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-09-21 10:29:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-21 10:29:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-09-21 10:29:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1462 backedges. 612 proven. 306 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-09-21 10:29:53,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066686670] [2020-09-21 10:29:53,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:53,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-21 10:29:53,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302687548] [2020-09-21 10:29:53,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-21 10:29:53,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:53,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-21 10:29:53,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2020-09-21 10:29:53,959 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand 38 states. [2020-09-21 10:29:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:54,970 INFO L93 Difference]: Finished difference Result 311 states and 376 transitions. [2020-09-21 10:29:54,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-21 10:29:54,971 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 187 [2020-09-21 10:29:54,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:54,973 INFO L225 Difference]: With dead ends: 311 [2020-09-21 10:29:54,973 INFO L226 Difference]: Without dead ends: 232 [2020-09-21 10:29:54,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=910, Invalid=2170, Unknown=0, NotChecked=0, Total=3080 [2020-09-21 10:29:54,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-21 10:29:54,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 160. [2020-09-21 10:29:54,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-21 10:29:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 171 transitions. [2020-09-21 10:29:54,983 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 171 transitions. Word has length 187 [2020-09-21 10:29:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:54,983 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 171 transitions. [2020-09-21 10:29:54,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-21 10:29:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 171 transitions. [2020-09-21 10:29:54,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-09-21 10:29:54,985 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:54,986 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:54,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 10:29:54,986 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:54,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:54,986 INFO L82 PathProgramCache]: Analyzing trace with hash 927992954, now seen corresponding path program 26 times [2020-09-21 10:29:54,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:54,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774455260] [2020-09-21 10:29:54,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 10:29:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 10:29:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:29:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 10:29:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-21 10:29:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-21 10:29:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-21 10:29:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-21 10:29:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-21 10:29:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-09-21 10:29:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-09-21 10:29:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-21 10:29:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-09-21 10:29:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-09-21 10:29:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-09-21 10:29:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-21 10:29:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-09-21 10:29:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 376 proven. 578 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-09-21 10:29:55,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774455260] [2020-09-21 10:29:55,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:55,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-21 10:29:55,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047065676] [2020-09-21 10:29:55,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-21 10:29:55,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:55,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-21 10:29:55,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-09-21 10:29:55,414 INFO L87 Difference]: Start difference. First operand 160 states and 171 transitions. Second operand 23 states. [2020-09-21 10:29:55,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:55,672 INFO L93 Difference]: Finished difference Result 175 states and 187 transitions. [2020-09-21 10:29:55,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 10:29:55,672 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 189 [2020-09-21 10:29:55,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:55,674 INFO L225 Difference]: With dead ends: 175 [2020-09-21 10:29:55,675 INFO L226 Difference]: Without dead ends: 173 [2020-09-21 10:29:55,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2020-09-21 10:29:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-21 10:29:55,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2020-09-21 10:29:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-21 10:29:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 184 transitions. [2020-09-21 10:29:55,685 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 184 transitions. Word has length 189 [2020-09-21 10:29:55,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:55,686 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 184 transitions. [2020-09-21 10:29:55,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-21 10:29:55,686 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 184 transitions. [2020-09-21 10:29:55,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-09-21 10:29:55,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:55,688 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:55,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-21 10:29:55,688 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:55,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:55,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1753938524, now seen corresponding path program 27 times [2020-09-21 10:29:55,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:55,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227159816] [2020-09-21 10:29:55,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 10:29:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 10:29:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:29:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 10:29:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-21 10:29:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-21 10:29:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-21 10:29:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-21 10:29:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-21 10:29:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-09-21 10:29:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-09-21 10:29:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-21 10:29:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-09-21 10:29:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-09-21 10:29:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-09-21 10:29:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-21 10:29:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-09-21 10:29:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-09-21 10:29:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-09-21 10:29:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 760 proven. 342 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-09-21 10:29:56,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227159816] [2020-09-21 10:29:56,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:56,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-21 10:29:56,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848176453] [2020-09-21 10:29:56,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-21 10:29:56,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:56,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-21 10:29:56,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2020-09-21 10:29:56,754 INFO L87 Difference]: Start difference. First operand 172 states and 184 transitions. Second operand 41 states. [2020-09-21 10:29:57,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:57,781 INFO L93 Difference]: Finished difference Result 339 states and 408 transitions. [2020-09-21 10:29:57,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-21 10:29:57,781 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 205 [2020-09-21 10:29:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:57,783 INFO L225 Difference]: With dead ends: 339 [2020-09-21 10:29:57,783 INFO L226 Difference]: Without dead ends: 250 [2020-09-21 10:29:57,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1029, Invalid=2511, Unknown=0, NotChecked=0, Total=3540 [2020-09-21 10:29:57,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-21 10:29:57,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 174. [2020-09-21 10:29:57,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-21 10:29:57,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 186 transitions. [2020-09-21 10:29:57,794 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 186 transitions. Word has length 205 [2020-09-21 10:29:57,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:57,794 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 186 transitions. [2020-09-21 10:29:57,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-21 10:29:57,794 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 186 transitions. [2020-09-21 10:29:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-09-21 10:29:57,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:57,796 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:57,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-21 10:29:57,796 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:57,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:57,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1542073473, now seen corresponding path program 28 times [2020-09-21 10:29:57,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:57,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308054200] [2020-09-21 10:29:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 10:29:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-21 10:29:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-21 10:29:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-21 10:29:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-21 10:29:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-21 10:29:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-09-21 10:29:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-21 10:29:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-21 10:29:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-09-21 10:29:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-09-21 10:29:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-21 10:29:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-21 10:29:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-09-21 10:29:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-09-21 10:29:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-09-21 10:29:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-09-21 10:29:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-21 10:29:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-09-21 10:29:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 760 proven. 380 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-09-21 10:29:58,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308054200] [2020-09-21 10:29:58,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:29:58,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-21 10:29:58,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045964110] [2020-09-21 10:29:58,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-21 10:29:58,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:58,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-21 10:29:58,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2020-09-21 10:29:58,853 INFO L87 Difference]: Start difference. First operand 174 states and 186 transitions. Second operand 42 states. [2020-09-21 10:30:00,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:00,030 INFO L93 Difference]: Finished difference Result 343 states and 415 transitions. [2020-09-21 10:30:00,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-21 10:30:00,030 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 207 [2020-09-21 10:30:00,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:00,032 INFO L225 Difference]: With dead ends: 343 [2020-09-21 10:30:00,032 INFO L226 Difference]: Without dead ends: 256 [2020-09-21 10:30:00,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1111, Invalid=2671, Unknown=0, NotChecked=0, Total=3782 [2020-09-21 10:30:00,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-09-21 10:30:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 176. [2020-09-21 10:30:00,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-21 10:30:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 188 transitions. [2020-09-21 10:30:00,046 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 188 transitions. Word has length 207 [2020-09-21 10:30:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:00,047 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 188 transitions. [2020-09-21 10:30:00,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-21 10:30:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 188 transitions. [2020-09-21 10:30:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-09-21 10:30:00,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:00,049 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:00,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-21 10:30:00,050 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:00,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:00,050 INFO L82 PathProgramCache]: Analyzing trace with hash -196777626, now seen corresponding path program 29 times [2020-09-21 10:30:00,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:00,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814572996] [2020-09-21 10:30:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 10:30:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 10:30:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:30:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-21 10:30:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 10:30:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:30:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-21 10:30:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-09-21 10:30:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-21 10:30:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-09-21 10:30:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-21 10:30:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-09-21 10:30:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-09-21 10:30:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-09-21 10:30:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-09-21 10:30:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-09-21 10:30:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-09-21 10:30:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-09-21 10:30:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-09-21 10:30:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 458 proven. 722 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-09-21 10:30:00,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814572996] [2020-09-21 10:30:00,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:00,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-21 10:30:00,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776953356] [2020-09-21 10:30:00,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-21 10:30:00,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:00,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-21 10:30:00,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-09-21 10:30:00,600 INFO L87 Difference]: Start difference. First operand 176 states and 188 transitions. Second operand 25 states. [2020-09-21 10:30:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:00,872 INFO L93 Difference]: Finished difference Result 191 states and 204 transitions. [2020-09-21 10:30:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-21 10:30:00,872 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 209 [2020-09-21 10:30:00,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:00,874 INFO L225 Difference]: With dead ends: 191 [2020-09-21 10:30:00,874 INFO L226 Difference]: Without dead ends: 189 [2020-09-21 10:30:00,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2020-09-21 10:30:00,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-21 10:30:00,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2020-09-21 10:30:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-09-21 10:30:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 201 transitions. [2020-09-21 10:30:00,885 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 201 transitions. Word has length 209 [2020-09-21 10:30:00,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:00,885 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 201 transitions. [2020-09-21 10:30:00,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-21 10:30:00,886 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 201 transitions. [2020-09-21 10:30:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-09-21 10:30:00,887 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:00,887 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:00,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-21 10:30:00,887 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:00,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:00,888 INFO L82 PathProgramCache]: Analyzing trace with hash 65077064, now seen corresponding path program 30 times [2020-09-21 10:30:00,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:00,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978416646] [2020-09-21 10:30:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 10:30:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 10:30:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:30:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-21 10:30:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 10:30:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:30:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-21 10:30:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-09-21 10:30:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-21 10:30:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-09-21 10:30:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-21 10:30:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-09-21 10:30:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-09-21 10:30:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-09-21 10:30:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-09-21 10:30:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-09-21 10:30:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:01,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-09-21 10:30:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:02,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-09-21 10:30:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:02,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-09-21 10:30:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:02,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-09-21 10:30:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:02,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-09-21 10:30:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2184 backedges. 924 proven. 420 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-09-21 10:30:02,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978416646] [2020-09-21 10:30:02,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:02,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-09-21 10:30:02,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103933542] [2020-09-21 10:30:02,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-21 10:30:02,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:02,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-21 10:30:02,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2020-09-21 10:30:02,049 INFO L87 Difference]: Start difference. First operand 188 states and 201 transitions. Second operand 45 states. [2020-09-21 10:30:03,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:03,346 INFO L93 Difference]: Finished difference Result 371 states and 447 transitions. [2020-09-21 10:30:03,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-21 10:30:03,349 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 225 [2020-09-21 10:30:03,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:03,351 INFO L225 Difference]: With dead ends: 371 [2020-09-21 10:30:03,351 INFO L226 Difference]: Without dead ends: 274 [2020-09-21 10:30:03,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1242, Invalid=3048, Unknown=0, NotChecked=0, Total=4290 [2020-09-21 10:30:03,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-09-21 10:30:03,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 190. [2020-09-21 10:30:03,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-09-21 10:30:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 203 transitions. [2020-09-21 10:30:03,376 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 203 transitions. Word has length 225 [2020-09-21 10:30:03,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:03,376 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 203 transitions. [2020-09-21 10:30:03,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-09-21 10:30:03,377 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 203 transitions. [2020-09-21 10:30:03,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-09-21 10:30:03,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:03,378 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:03,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-21 10:30:03,379 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:03,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:03,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1137618157, now seen corresponding path program 31 times [2020-09-21 10:30:03,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:03,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384493813] [2020-09-21 10:30:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-21 10:30:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-21 10:30:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 10:30:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-21 10:30:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-21 10:30:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-09-21 10:30:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-21 10:30:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-09-21 10:30:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-09-21 10:30:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-21 10:30:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-09-21 10:30:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-09-21 10:30:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-21 10:30:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-09-21 10:30:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-21 10:30:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-09-21 10:30:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-09-21 10:30:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-09-21 10:30:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-09-21 10:30:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-09-21 10:30:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2020-09-21 10:30:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 924 proven. 462 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-09-21 10:30:04,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384493813] [2020-09-21 10:30:04,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:04,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-09-21 10:30:04,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279234924] [2020-09-21 10:30:04,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-21 10:30:04,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:04,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-21 10:30:04,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2020-09-21 10:30:04,645 INFO L87 Difference]: Start difference. First operand 190 states and 203 transitions. Second operand 46 states. [2020-09-21 10:30:06,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:06,090 INFO L93 Difference]: Finished difference Result 375 states and 454 transitions. [2020-09-21 10:30:06,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-21 10:30:06,090 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 227 [2020-09-21 10:30:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:06,092 INFO L225 Difference]: With dead ends: 375 [2020-09-21 10:30:06,092 INFO L226 Difference]: Without dead ends: 280 [2020-09-21 10:30:06,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1332, Invalid=3224, Unknown=0, NotChecked=0, Total=4556 [2020-09-21 10:30:06,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-21 10:30:06,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 192. [2020-09-21 10:30:06,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-09-21 10:30:06,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 205 transitions. [2020-09-21 10:30:06,104 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 205 transitions. Word has length 227 [2020-09-21 10:30:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:06,105 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 205 transitions. [2020-09-21 10:30:06,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-21 10:30:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 205 transitions. [2020-09-21 10:30:06,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-09-21 10:30:06,106 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:06,106 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:06,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-21 10:30:06,107 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:06,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:06,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1057457490, now seen corresponding path program 32 times [2020-09-21 10:30:06,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:06,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319001612] [2020-09-21 10:30:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 10:30:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:30:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 10:30:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-21 10:30:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-21 10:30:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-21 10:30:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-21 10:30:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-21 10:30:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-09-21 10:30:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-09-21 10:30:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-21 10:30:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-09-21 10:30:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-09-21 10:30:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-09-21 10:30:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-21 10:30:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-09-21 10:30:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-09-21 10:30:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-09-21 10:30:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-09-21 10:30:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-09-21 10:30:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-09-21 10:30:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 548 proven. 882 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-09-21 10:30:06,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319001612] [2020-09-21 10:30:06,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:06,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-21 10:30:06,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039725636] [2020-09-21 10:30:06,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-21 10:30:06,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:06,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-21 10:30:06,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-09-21 10:30:06,830 INFO L87 Difference]: Start difference. First operand 192 states and 205 transitions. Second operand 27 states. [2020-09-21 10:30:07,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:07,078 INFO L93 Difference]: Finished difference Result 207 states and 221 transitions. [2020-09-21 10:30:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-21 10:30:07,079 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 229 [2020-09-21 10:30:07,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:07,080 INFO L225 Difference]: With dead ends: 207 [2020-09-21 10:30:07,081 INFO L226 Difference]: Without dead ends: 205 [2020-09-21 10:30:07,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2020-09-21 10:30:07,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-21 10:30:07,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2020-09-21 10:30:07,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-21 10:30:07,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 218 transitions. [2020-09-21 10:30:07,090 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 218 transitions. Word has length 229 [2020-09-21 10:30:07,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:07,091 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 218 transitions. [2020-09-21 10:30:07,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-21 10:30:07,091 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 218 transitions. [2020-09-21 10:30:07,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-09-21 10:30:07,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:07,092 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:07,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-21 10:30:07,092 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:07,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:07,093 INFO L82 PathProgramCache]: Analyzing trace with hash -777665740, now seen corresponding path program 33 times [2020-09-21 10:30:07,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:07,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710202530] [2020-09-21 10:30:07,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 10:30:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:30:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 10:30:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-21 10:30:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-21 10:30:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-21 10:30:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-21 10:30:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-21 10:30:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-09-21 10:30:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-09-21 10:30:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-21 10:30:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-09-21 10:30:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-09-21 10:30:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-09-21 10:30:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-21 10:30:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-09-21 10:30:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-09-21 10:30:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-09-21 10:30:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-09-21 10:30:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-09-21 10:30:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-09-21 10:30:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2020-09-21 10:30:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2020-09-21 10:30:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 1104 proven. 506 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-09-21 10:30:08,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710202530] [2020-09-21 10:30:08,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:08,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-09-21 10:30:08,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546816872] [2020-09-21 10:30:08,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-09-21 10:30:08,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:08,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-09-21 10:30:08,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2020-09-21 10:30:08,558 INFO L87 Difference]: Start difference. First operand 204 states and 218 transitions. Second operand 49 states. [2020-09-21 10:30:10,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:10,181 INFO L93 Difference]: Finished difference Result 403 states and 486 transitions. [2020-09-21 10:30:10,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-21 10:30:10,182 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 245 [2020-09-21 10:30:10,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:10,184 INFO L225 Difference]: With dead ends: 403 [2020-09-21 10:30:10,184 INFO L226 Difference]: Without dead ends: 298 [2020-09-21 10:30:10,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1475, Invalid=3637, Unknown=0, NotChecked=0, Total=5112 [2020-09-21 10:30:10,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-09-21 10:30:10,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 206. [2020-09-21 10:30:10,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-09-21 10:30:10,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 220 transitions. [2020-09-21 10:30:10,203 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 220 transitions. Word has length 245 [2020-09-21 10:30:10,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:10,204 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 220 transitions. [2020-09-21 10:30:10,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-09-21 10:30:10,204 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 220 transitions. [2020-09-21 10:30:10,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-09-21 10:30:10,205 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:10,206 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:10,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-21 10:30:10,206 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:10,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:10,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1435577433, now seen corresponding path program 34 times [2020-09-21 10:30:10,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:10,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554893306] [2020-09-21 10:30:10,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-21 10:30:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-21 10:30:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-21 10:30:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-21 10:30:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-21 10:30:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-09-21 10:30:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-21 10:30:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-21 10:30:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-09-21 10:30:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-09-21 10:30:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-21 10:30:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-21 10:30:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-09-21 10:30:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-09-21 10:30:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-09-21 10:30:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-09-21 10:30:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-21 10:30:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-09-21 10:30:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-09-21 10:30:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2020-09-21 10:30:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2020-09-21 10:30:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:30:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2020-09-21 10:30:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2668 backedges. 1104 proven. 552 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-09-21 10:30:11,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554893306] [2020-09-21 10:30:11,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:11,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-09-21 10:30:11,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831870755] [2020-09-21 10:30:11,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-09-21 10:30:11,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:11,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-09-21 10:30:11,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2020-09-21 10:30:11,691 INFO L87 Difference]: Start difference. First operand 206 states and 220 transitions. Second operand 50 states. [2020-09-21 10:30:13,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:13,353 INFO L93 Difference]: Finished difference Result 407 states and 493 transitions. [2020-09-21 10:30:13,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-21 10:30:13,354 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 247 [2020-09-21 10:30:13,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:13,355 INFO L225 Difference]: With dead ends: 407 [2020-09-21 10:30:13,356 INFO L226 Difference]: Without dead ends: 304 [2020-09-21 10:30:13,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1573, Invalid=3829, Unknown=0, NotChecked=0, Total=5402 [2020-09-21 10:30:13,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-21 10:30:13,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 208. [2020-09-21 10:30:13,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-09-21 10:30:13,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 222 transitions. [2020-09-21 10:30:13,368 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 222 transitions. Word has length 247 [2020-09-21 10:30:13,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:13,368 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 222 transitions. [2020-09-21 10:30:13,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-09-21 10:30:13,368 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 222 transitions. [2020-09-21 10:30:13,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-09-21 10:30:13,370 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:13,370 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:13,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-21 10:30:13,371 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:13,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:13,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1941512130, now seen corresponding path program 35 times [2020-09-21 10:30:13,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:13,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039898873] [2020-09-21 10:30:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 10:30:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:30:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-21 10:30:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 10:30:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:30:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-21 10:30:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-09-21 10:30:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-21 10:30:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-09-21 10:30:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-21 10:30:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-09-21 10:30:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-09-21 10:30:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-09-21 10:30:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-09-21 10:30:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-09-21 10:30:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-09-21 10:30:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-09-21 10:30:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-09-21 10:30:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-09-21 10:30:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-09-21 10:30:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-09-21 10:30:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-09-21 10:30:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:13,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-09-21 10:30:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2716 backedges. 646 proven. 1058 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-09-21 10:30:14,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039898873] [2020-09-21 10:30:14,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:14,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-21 10:30:14,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68168929] [2020-09-21 10:30:14,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-21 10:30:14,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:14,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-21 10:30:14,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-09-21 10:30:14,014 INFO L87 Difference]: Start difference. First operand 208 states and 222 transitions. Second operand 29 states. [2020-09-21 10:30:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:14,325 INFO L93 Difference]: Finished difference Result 223 states and 238 transitions. [2020-09-21 10:30:14,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-21 10:30:14,325 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 249 [2020-09-21 10:30:14,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:14,327 INFO L225 Difference]: With dead ends: 223 [2020-09-21 10:30:14,327 INFO L226 Difference]: Without dead ends: 221 [2020-09-21 10:30:14,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2020-09-21 10:30:14,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-21 10:30:14,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2020-09-21 10:30:14,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-09-21 10:30:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 235 transitions. [2020-09-21 10:30:14,341 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 235 transitions. Word has length 249 [2020-09-21 10:30:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:14,341 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 235 transitions. [2020-09-21 10:30:14,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-21 10:30:14,342 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 235 transitions. [2020-09-21 10:30:14,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-09-21 10:30:14,343 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:14,343 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:14,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-21 10:30:14,344 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:14,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:14,344 INFO L82 PathProgramCache]: Analyzing trace with hash -712391136, now seen corresponding path program 36 times [2020-09-21 10:30:14,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:14,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937808457] [2020-09-21 10:30:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 10:30:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:30:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-21 10:30:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 10:30:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:30:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-21 10:30:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-09-21 10:30:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-21 10:30:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-09-21 10:30:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-21 10:30:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-09-21 10:30:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-09-21 10:30:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-09-21 10:30:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-09-21 10:30:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-09-21 10:30:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-09-21 10:30:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-09-21 10:30:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-09-21 10:30:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-09-21 10:30:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-09-21 10:30:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-09-21 10:30:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-09-21 10:30:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-09-21 10:30:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2020-09-21 10:30:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:15,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2020-09-21 10:30:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3100 backedges. 1300 proven. 600 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-09-21 10:30:16,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937808457] [2020-09-21 10:30:16,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:16,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-09-21 10:30:16,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237811341] [2020-09-21 10:30:16,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-09-21 10:30:16,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:16,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-09-21 10:30:16,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2020-09-21 10:30:16,013 INFO L87 Difference]: Start difference. First operand 220 states and 235 transitions. Second operand 53 states. [2020-09-21 10:30:17,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:17,829 INFO L93 Difference]: Finished difference Result 435 states and 525 transitions. [2020-09-21 10:30:17,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-21 10:30:17,830 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 265 [2020-09-21 10:30:17,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:17,832 INFO L225 Difference]: With dead ends: 435 [2020-09-21 10:30:17,832 INFO L226 Difference]: Without dead ends: 322 [2020-09-21 10:30:17,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1728, Invalid=4278, Unknown=0, NotChecked=0, Total=6006 [2020-09-21 10:30:17,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-21 10:30:17,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 222. [2020-09-21 10:30:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-09-21 10:30:17,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 237 transitions. [2020-09-21 10:30:17,844 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 237 transitions. Word has length 265 [2020-09-21 10:30:17,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:17,845 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 237 transitions. [2020-09-21 10:30:17,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-09-21 10:30:17,845 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 237 transitions. [2020-09-21 10:30:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-09-21 10:30:17,847 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:17,847 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:17,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-21 10:30:17,847 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:17,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:17,848 INFO L82 PathProgramCache]: Analyzing trace with hash -993908027, now seen corresponding path program 37 times [2020-09-21 10:30:17,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:17,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555058550] [2020-09-21 10:30:17,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-21 10:30:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 10:30:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-21 10:30:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-21 10:30:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-09-21 10:30:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-21 10:30:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-09-21 10:30:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-09-21 10:30:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-21 10:30:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-09-21 10:30:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-09-21 10:30:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-21 10:30:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-09-21 10:30:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-21 10:30:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-09-21 10:30:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-09-21 10:30:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-09-21 10:30:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-09-21 10:30:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-09-21 10:30:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2020-09-21 10:30:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-09-21 10:30:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2020-09-21 10:30:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2020-09-21 10:30:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-09-21 10:30:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-09-21 10:30:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 1300 proven. 650 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-09-21 10:30:19,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555058550] [2020-09-21 10:30:19,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:19,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-09-21 10:30:19,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811803287] [2020-09-21 10:30:19,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-09-21 10:30:19,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:19,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-09-21 10:30:19,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2020-09-21 10:30:19,589 INFO L87 Difference]: Start difference. First operand 222 states and 237 transitions. Second operand 54 states. [2020-09-21 10:30:21,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:21,543 INFO L93 Difference]: Finished difference Result 439 states and 532 transitions. [2020-09-21 10:30:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-09-21 10:30:21,544 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 267 [2020-09-21 10:30:21,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:21,545 INFO L225 Difference]: With dead ends: 439 [2020-09-21 10:30:21,546 INFO L226 Difference]: Without dead ends: 328 [2020-09-21 10:30:21,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1834, Invalid=4486, Unknown=0, NotChecked=0, Total=6320 [2020-09-21 10:30:21,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-09-21 10:30:21,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 224. [2020-09-21 10:30:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-09-21 10:30:21,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 239 transitions. [2020-09-21 10:30:21,558 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 239 transitions. Word has length 267 [2020-09-21 10:30:21,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:21,559 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 239 transitions. [2020-09-21 10:30:21,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-09-21 10:30:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 239 transitions. [2020-09-21 10:30:21,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-09-21 10:30:21,560 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:21,561 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:21,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-09-21 10:30:21,561 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:21,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:21,561 INFO L82 PathProgramCache]: Analyzing trace with hash -948700630, now seen corresponding path program 38 times [2020-09-21 10:30:21,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:21,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971095500] [2020-09-21 10:30:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:30:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 10:30:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-21 10:30:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-21 10:30:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-21 10:30:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-21 10:30:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-21 10:30:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-09-21 10:30:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-09-21 10:30:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-21 10:30:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-09-21 10:30:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-09-21 10:30:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-09-21 10:30:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-21 10:30:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-09-21 10:30:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-09-21 10:30:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-09-21 10:30:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-09-21 10:30:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-09-21 10:30:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-09-21 10:30:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2020-09-21 10:30:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2020-09-21 10:30:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2020-09-21 10:30:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2020-09-21 10:30:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-09-21 10:30:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 752 proven. 1250 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-09-21 10:30:22,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971095500] [2020-09-21 10:30:22,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:22,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-21 10:30:22,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417357056] [2020-09-21 10:30:22,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-21 10:30:22,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:22,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-21 10:30:22,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-09-21 10:30:22,356 INFO L87 Difference]: Start difference. First operand 224 states and 239 transitions. Second operand 31 states. [2020-09-21 10:30:22,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:22,707 INFO L93 Difference]: Finished difference Result 239 states and 255 transitions. [2020-09-21 10:30:22,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-21 10:30:22,708 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 269 [2020-09-21 10:30:22,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:22,710 INFO L225 Difference]: With dead ends: 239 [2020-09-21 10:30:22,710 INFO L226 Difference]: Without dead ends: 237 [2020-09-21 10:30:22,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2020-09-21 10:30:22,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-21 10:30:22,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2020-09-21 10:30:22,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-09-21 10:30:22,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 252 transitions. [2020-09-21 10:30:22,720 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 252 transitions. Word has length 269 [2020-09-21 10:30:22,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:22,720 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 252 transitions. [2020-09-21 10:30:22,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-21 10:30:22,721 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 252 transitions. [2020-09-21 10:30:22,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-09-21 10:30:22,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:22,722 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:22,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-21 10:30:22,723 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:22,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:22,723 INFO L82 PathProgramCache]: Analyzing trace with hash 167610380, now seen corresponding path program 39 times [2020-09-21 10:30:22,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:22,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762029024] [2020-09-21 10:30:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:30:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 10:30:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-21 10:30:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-21 10:30:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-21 10:30:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-21 10:30:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-21 10:30:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-09-21 10:30:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-09-21 10:30:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-21 10:30:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-09-21 10:30:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-09-21 10:30:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-09-21 10:30:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-21 10:30:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-09-21 10:30:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-09-21 10:30:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-09-21 10:30:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-09-21 10:30:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-09-21 10:30:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-09-21 10:30:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2020-09-21 10:30:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2020-09-21 10:30:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2020-09-21 10:30:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2020-09-21 10:30:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-09-21 10:30:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-09-21 10:30:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 273 [2020-09-21 10:30:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 1512 proven. 702 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-09-21 10:30:24,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762029024] [2020-09-21 10:30:24,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:24,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-09-21 10:30:24,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343192507] [2020-09-21 10:30:24,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-09-21 10:30:24,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:24,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-09-21 10:30:24,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2020-09-21 10:30:24,607 INFO L87 Difference]: Start difference. First operand 236 states and 252 transitions. Second operand 57 states. [2020-09-21 10:30:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:26,752 INFO L93 Difference]: Finished difference Result 467 states and 564 transitions. [2020-09-21 10:30:26,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-09-21 10:30:26,752 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 285 [2020-09-21 10:30:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:26,755 INFO L225 Difference]: With dead ends: 467 [2020-09-21 10:30:26,756 INFO L226 Difference]: Without dead ends: 346 [2020-09-21 10:30:26,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2001, Invalid=4971, Unknown=0, NotChecked=0, Total=6972 [2020-09-21 10:30:26,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-09-21 10:30:26,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 238. [2020-09-21 10:30:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-09-21 10:30:26,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 254 transitions. [2020-09-21 10:30:26,771 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 254 transitions. Word has length 285 [2020-09-21 10:30:26,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:26,772 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 254 transitions. [2020-09-21 10:30:26,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-09-21 10:30:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 254 transitions. [2020-09-21 10:30:26,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-09-21 10:30:26,774 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:26,774 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:26,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-21 10:30:26,775 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:26,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:26,775 INFO L82 PathProgramCache]: Analyzing trace with hash 196225073, now seen corresponding path program 40 times [2020-09-21 10:30:26,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:26,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856216233] [2020-09-21 10:30:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat