/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:07:09,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:07:09,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:07:10,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:07:10,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:07:10,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:07:10,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:07:10,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:07:10,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:07:10,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:07:10,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:07:10,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:07:10,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:07:10,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:07:10,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:07:10,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:07:10,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:07:10,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:07:10,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:07:10,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:07:10,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:07:10,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:07:10,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:07:10,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:07:10,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:07:10,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:07:10,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:07:10,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:07:10,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:07:10,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 23:07:10,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:07:10,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:07:10,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:07:10,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 23:07:10,119 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:07:10,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:07:10,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:07:10,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:07:10,121 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:07:10,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:07:10,122 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:07:10,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:07:10,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:07:10,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:07:10,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:07:10,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:07:10,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:07:10,125 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:07:10,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:07:10,125 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:07:10,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:07:10,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:07:10,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:07:10,126 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:07:10,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:07:10,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:07:10,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:07:10,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:07:10,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:07:10,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:07:10,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:07:10,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:07:10,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:07:10,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 23:07:10,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:07:10,485 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:07:10,489 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:07:10,490 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:07:10,491 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:07:10,492 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-08-21 23:07:10,565 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eaf92c0fa/d0c9dae7737e473886c1fb67203dc550/FLAG3c84b6c25 [2020-08-21 23:07:10,994 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:07:10,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-08-21 23:07:11,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eaf92c0fa/d0c9dae7737e473886c1fb67203dc550/FLAG3c84b6c25 [2020-08-21 23:07:11,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eaf92c0fa/d0c9dae7737e473886c1fb67203dc550 [2020-08-21 23:07:11,344 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:07:11,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:07:11,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:07:11,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:07:11,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:07:11,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:07:11" (1/1) ... [2020-08-21 23:07:11,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@176fd554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:07:11, skipping insertion in model container [2020-08-21 23:07:11,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:07:11" (1/1) ... [2020-08-21 23:07:11,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:07:11,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:07:11,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:07:11,564 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:07:11,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:07:11,596 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:07:11,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:07:11 WrapperNode [2020-08-21 23:07:11,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:07:11,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:07:11,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:07:11,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:07:11,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:07:11" (1/1) ... [2020-08-21 23:07:11,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:07:11" (1/1) ... [2020-08-21 23:07:11,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:07:11" (1/1) ... [2020-08-21 23:07:11,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:07:11" (1/1) ... [2020-08-21 23:07:11,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:07:11" (1/1) ... [2020-08-21 23:07:11,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:07:11" (1/1) ... [2020-08-21 23:07:11,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:07:11" (1/1) ... [2020-08-21 23:07:11,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:07:11,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:07:11,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:07:11,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:07:11,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:07:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:07:11,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:07:11,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:07:11,768 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 23:07:11,768 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 23:07:11,768 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:07:11,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:07:11,768 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 23:07:11,768 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 23:07:11,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 23:07:11,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 23:07:11,769 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:07:11,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:07:11,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:07:12,048 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:07:12,049 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 23:07:12,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:07:12 BoogieIcfgContainer [2020-08-21 23:07:12,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:07:12,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:07:12,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:07:12,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:07:12,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:07:11" (1/3) ... [2020-08-21 23:07:12,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f615dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:07:12, skipping insertion in model container [2020-08-21 23:07:12,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:07:11" (2/3) ... [2020-08-21 23:07:12,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f615dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:07:12, skipping insertion in model container [2020-08-21 23:07:12,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:07:12" (3/3) ... [2020-08-21 23:07:12,074 INFO L109 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2020-08-21 23:07:12,085 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:07:12,092 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:07:12,104 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:07:12,126 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:07:12,126 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:07:12,126 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:07:12,126 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:07:12,126 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:07:12,127 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:07:12,127 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:07:12,127 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:07:12,144 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-21 23:07:12,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 23:07:12,150 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:07:12,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:07:12,151 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:07:12,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:07:12,156 INFO L82 PathProgramCache]: Analyzing trace with hash 160437665, now seen corresponding path program 1 times [2020-08-21 23:07:12,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:07:12,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679347914] [2020-08-21 23:07:12,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:07:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:12,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:07:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:07:12,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679347914] [2020-08-21 23:07:12,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:07:12,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 23:07:12,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552459613] [2020-08-21 23:07:12,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 23:07:12,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:07:12,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 23:07:12,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 23:07:12,313 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-08-21 23:07:12,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:07:12,344 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2020-08-21 23:07:12,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 23:07:12,345 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-21 23:07:12,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:07:12,356 INFO L225 Difference]: With dead ends: 61 [2020-08-21 23:07:12,356 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 23:07:12,361 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 [2020-08-21 23:07:12,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 23:07:12,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-21 23:07:12,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-21 23:07:12,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-08-21 23:07:12,408 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2020-08-21 23:07:12,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:07:12,409 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-08-21 23:07:12,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 23:07:12,409 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-08-21 23:07:12,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 23:07:12,410 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:07:12,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:07:12,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:07:12,411 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:07:12,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:07:12,412 INFO L82 PathProgramCache]: Analyzing trace with hash 89152719, now seen corresponding path program 1 times [2020-08-21 23:07:12,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:07:12,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762096375] [2020-08-21 23:07:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:07:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:12,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:07:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:07:12,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762096375] [2020-08-21 23:07:12,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:07:12,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 23:07:12,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598067970] [2020-08-21 23:07:12,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 23:07:12,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:07:12,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 23:07:12,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:07:12,639 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 5 states. [2020-08-21 23:07:12,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:07:12,754 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-08-21 23:07:12,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 23:07:12,755 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-21 23:07:12,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:07:12,757 INFO L225 Difference]: With dead ends: 35 [2020-08-21 23:07:12,757 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 23:07:12,759 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 [2020-08-21 23:07:12,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 23:07:12,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 23:07:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 23:07:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-08-21 23:07:12,771 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2020-08-21 23:07:12,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:07:12,772 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-08-21 23:07:12,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 23:07:12,772 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-08-21 23:07:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 23:07:12,774 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:07:12,774 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:07:12,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:07:12,774 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:07:12,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:07:12,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1105875316, now seen corresponding path program 1 times [2020-08-21 23:07:12,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:07:12,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126169658] [2020-08-21 23:07:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:07:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:12,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:07:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:12,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 23:07:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:07:12,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126169658] [2020-08-21 23:07:12,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:07:12,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 23:07:12,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422539735] [2020-08-21 23:07:12,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 23:07:12,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:07:12,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 23:07:12,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 23:07:12,884 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-08-21 23:07:13,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:07:13,028 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-08-21 23:07:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 23:07:13,029 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-21 23:07:13,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:07:13,030 INFO L225 Difference]: With dead ends: 48 [2020-08-21 23:07:13,031 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 23:07:13,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 23:07:13,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 23:07:13,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-21 23:07:13,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-21 23:07:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-08-21 23:07:13,045 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 20 [2020-08-21 23:07:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:07:13,046 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-08-21 23:07:13,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 23:07:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-08-21 23:07:13,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 23:07:13,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:07:13,048 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:07:13,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:07:13,050 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:07:13,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:07:13,051 INFO L82 PathProgramCache]: Analyzing trace with hash 726428669, now seen corresponding path program 1 times [2020-08-21 23:07:13,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:07:13,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197409818] [2020-08-21 23:07:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:07:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:13,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:07:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:13,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:07:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:13,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 23:07:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 23:07:13,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197409818] [2020-08-21 23:07:13,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:07:13,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 23:07:13,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874578917] [2020-08-21 23:07:13,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 23:07:13,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:07:13,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 23:07:13,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 23:07:13,209 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-08-21 23:07:13,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:07:13,346 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-08-21 23:07:13,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 23:07:13,347 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-21 23:07:13,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:07:13,348 INFO L225 Difference]: With dead ends: 55 [2020-08-21 23:07:13,351 INFO L226 Difference]: Without dead ends: 53 [2020-08-21 23:07:13,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 23:07:13,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-21 23:07:13,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-08-21 23:07:13,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 23:07:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-08-21 23:07:13,373 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 28 [2020-08-21 23:07:13,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:07:13,374 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-08-21 23:07:13,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 23:07:13,374 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-08-21 23:07:13,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 23:07:13,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:07:13,376 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:07:13,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:07:13,376 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:07:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:07:13,377 INFO L82 PathProgramCache]: Analyzing trace with hash 239914697, now seen corresponding path program 1 times [2020-08-21 23:07:13,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:07:13,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510987799] [2020-08-21 23:07:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:07:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:13,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:07:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:13,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 23:07:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:13,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 23:07:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:13,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 23:07:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-21 23:07:13,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510987799] [2020-08-21 23:07:13,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:07:13,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 23:07:13,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919108040] [2020-08-21 23:07:13,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 23:07:13,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:07:13,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 23:07:13,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 23:07:13,467 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 7 states. [2020-08-21 23:07:13,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:07:13,670 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-08-21 23:07:13,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 23:07:13,671 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-08-21 23:07:13,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:07:13,673 INFO L225 Difference]: With dead ends: 70 [2020-08-21 23:07:13,673 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 23:07:13,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:07:13,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 23:07:13,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-21 23:07:13,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 23:07:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-08-21 23:07:13,687 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-08-21 23:07:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:07:13,687 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-08-21 23:07:13,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 23:07:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-08-21 23:07:13,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 23:07:13,689 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:07:13,689 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:07:13,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:07:13,690 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:07:13,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:07:13,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1617190790, now seen corresponding path program 1 times [2020-08-21 23:07:13,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:07:13,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328556092] [2020-08-21 23:07:13,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:07:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:13,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:07:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:13,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:07:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:13,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 23:07:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:13,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 23:07:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-21 23:07:13,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328556092] [2020-08-21 23:07:13,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:07:13,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 23:07:13,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350863645] [2020-08-21 23:07:13,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 23:07:13,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:07:13,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 23:07:13,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 23:07:13,788 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 8 states. [2020-08-21 23:07:13,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:07:13,976 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-08-21 23:07:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 23:07:13,977 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-08-21 23:07:13,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:07:13,979 INFO L225 Difference]: With dead ends: 72 [2020-08-21 23:07:13,979 INFO L226 Difference]: Without dead ends: 70 [2020-08-21 23:07:13,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-08-21 23:07:13,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-21 23:07:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-08-21 23:07:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-21 23:07:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-08-21 23:07:13,993 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 33 [2020-08-21 23:07:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:07:13,993 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-08-21 23:07:13,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 23:07:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-08-21 23:07:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 23:07:13,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:07:13,996 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:07:13,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:07:13,996 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:07:13,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:07:13,997 INFO L82 PathProgramCache]: Analyzing trace with hash 260855770, now seen corresponding path program 1 times [2020-08-21 23:07:13,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:07:13,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719786369] [2020-08-21 23:07:13,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:07:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:07:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:07:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 23:07:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 23:07:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 23:07:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 23:07:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 23:07:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 23:07:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-21 23:07:14,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719786369] [2020-08-21 23:07:14,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:07:14,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 23:07:14,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334067166] [2020-08-21 23:07:14,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:07:14,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:07:14,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:07:14,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:07:14,207 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 9 states. [2020-08-21 23:07:14,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:07:14,571 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2020-08-21 23:07:14,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 23:07:14,571 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-08-21 23:07:14,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:07:14,574 INFO L225 Difference]: With dead ends: 96 [2020-08-21 23:07:14,574 INFO L226 Difference]: Without dead ends: 86 [2020-08-21 23:07:14,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-21 23:07:14,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-21 23:07:14,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2020-08-21 23:07:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 23:07:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-08-21 23:07:14,591 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 56 [2020-08-21 23:07:14,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:07:14,592 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-08-21 23:07:14,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 23:07:14,592 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-08-21 23:07:14,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 23:07:14,593 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:07:14,593 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:07:14,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 23:07:14,594 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:07:14,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:07:14,594 INFO L82 PathProgramCache]: Analyzing trace with hash 266725463, now seen corresponding path program 1 times [2020-08-21 23:07:14,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:07:14,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739723702] [2020-08-21 23:07:14,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:07:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:07:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:07:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 23:07:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 23:07:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 23:07:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 23:07:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 23:07:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:07:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-21 23:07:14,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739723702] [2020-08-21 23:07:14,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:07:14,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 23:07:14,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56981006] [2020-08-21 23:07:14,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:07:14,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:07:14,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:07:14,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:07:14,720 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 9 states. [2020-08-21 23:07:14,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:07:14,908 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2020-08-21 23:07:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 23:07:14,909 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-08-21 23:07:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:07:14,911 INFO L225 Difference]: With dead ends: 89 [2020-08-21 23:07:14,911 INFO L226 Difference]: Without dead ends: 87 [2020-08-21 23:07:14,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-08-21 23:07:14,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-21 23:07:14,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2020-08-21 23:07:14,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-21 23:07:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-08-21 23:07:14,924 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 58 [2020-08-21 23:07:14,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:07:14,925 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-08-21 23:07:14,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 23:07:14,925 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-08-21 23:07:14,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-21 23:07:14,927 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:07:14,927 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:07:14,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 23:07:14,928 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:07:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:07:14,928 INFO L82 PathProgramCache]: Analyzing trace with hash 269972457, now seen corresponding path program 2 times [2020-08-21 23:07:14,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:07:14,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994374697] [2020-08-21 23:07:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:07:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:07:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:07:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 23:07:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 23:07:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 23:07:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 23:07:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 23:07:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:07:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-21 23:07:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:07:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 23:07:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 23:07:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-08-21 23:07:15,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994374697] [2020-08-21 23:07:15,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:07:15,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 23:07:15,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850993385] [2020-08-21 23:07:15,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:07:15,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:07:15,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:07:15,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:07:15,231 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 10 states. [2020-08-21 23:07:15,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:07:15,395 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-08-21 23:07:15,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 23:07:15,396 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-08-21 23:07:15,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:07:15,402 INFO L225 Difference]: With dead ends: 88 [2020-08-21 23:07:15,402 INFO L226 Difference]: Without dead ends: 79 [2020-08-21 23:07:15,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-08-21 23:07:15,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-21 23:07:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2020-08-21 23:07:15,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 23:07:15,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-08-21 23:07:15,421 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 81 [2020-08-21 23:07:15,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:07:15,421 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-08-21 23:07:15,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:07:15,422 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-08-21 23:07:15,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 23:07:15,430 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:07:15,430 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:07:15,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 23:07:15,430 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:07:15,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:07:15,431 INFO L82 PathProgramCache]: Analyzing trace with hash 437927078, now seen corresponding path program 2 times [2020-08-21 23:07:15,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:07:15,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396336611] [2020-08-21 23:07:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:07:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:07:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:07:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 23:07:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 23:07:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 23:07:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 23:07:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 23:07:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:07:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-21 23:07:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-21 23:07:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 23:07:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 23:07:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-21 23:07:15,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396336611] [2020-08-21 23:07:15,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:07:15,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 23:07:15,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508430140] [2020-08-21 23:07:15,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 23:07:15,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:07:15,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 23:07:15,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-21 23:07:15,665 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 11 states. [2020-08-21 23:07:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:07:16,035 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2020-08-21 23:07:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 23:07:16,036 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-08-21 23:07:16,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:07:16,037 INFO L225 Difference]: With dead ends: 92 [2020-08-21 23:07:16,037 INFO L226 Difference]: Without dead ends: 90 [2020-08-21 23:07:16,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-08-21 23:07:16,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-21 23:07:16,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2020-08-21 23:07:16,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-21 23:07:16,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-08-21 23:07:16,070 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 83 [2020-08-21 23:07:16,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:07:16,073 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-08-21 23:07:16,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 23:07:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-08-21 23:07:16,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-21 23:07:16,080 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:07:16,080 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:07:16,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 23:07:16,081 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:07:16,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:07:16,082 INFO L82 PathProgramCache]: Analyzing trace with hash 331157303, now seen corresponding path program 3 times [2020-08-21 23:07:16,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:07:16,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776132548] [2020-08-21 23:07:16,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:07:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:16,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:07:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:16,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:07:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:16,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 23:07:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:16,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 23:07:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:16,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 23:07:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:16,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 23:07:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:16,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 23:07:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:16,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:07:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:16,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-21 23:07:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:16,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-21 23:07:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:16,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 23:07:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:16,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 23:07:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:16,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 23:07:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:16,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-21 23:07:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:16,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 23:07:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:16,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-21 23:07:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:07:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 30 proven. 51 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2020-08-21 23:07:16,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776132548] [2020-08-21 23:07:16,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:07:16,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 23:07:16,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840461075] [2020-08-21 23:07:16,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 23:07:16,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:07:16,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 23:07:16,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-08-21 23:07:16,501 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 13 states. [2020-08-21 23:07:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:07:16,660 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2020-08-21 23:07:16,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 23:07:16,660 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-08-21 23:07:16,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:07:16,661 INFO L225 Difference]: With dead ends: 83 [2020-08-21 23:07:16,661 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 23:07:16,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-08-21 23:07:16,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 23:07:16,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 23:07:16,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 23:07:16,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 23:07:16,663 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2020-08-21 23:07:16,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:07:16,664 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 23:07:16,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 23:07:16,664 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 23:07:16,664 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 23:07:16,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 23:07:16,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 23:07:17,074 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 23:07:17,074 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 23:07:17,074 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 23:07:17,075 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 23:07:17,075 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 23:07:17,075 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 23:07:17,075 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-21 23:07:17,075 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-21 23:07:17,075 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-21 23:07:17,075 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-21 23:07:17,075 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-08-21 23:07:17,076 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 45) no Hoare annotation was computed. [2020-08-21 23:07:17,076 INFO L271 CegarLoopResult]: At program point L44(lines 14 45) the Hoare annotation is: true [2020-08-21 23:07:17,076 INFO L264 CegarLoopResult]: At program point L36(lines 26 37) the Hoare annotation is: (and (<= 0 main_~buf~0) (< main_~buf~0 (+ main_~buflim~0 1)) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0)) [2020-08-21 23:07:17,076 INFO L268 CegarLoopResult]: For program point L28(lines 28 29) no Hoare annotation was computed. [2020-08-21 23:07:17,076 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-21 23:07:17,076 INFO L268 CegarLoopResult]: For program point L20-1(lines 14 45) no Hoare annotation was computed. [2020-08-21 23:07:17,077 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 1) main_~bufferlen~0) (<= 2 main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-21 23:07:17,077 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 1) main_~bufferlen~0) (<= 2 main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-21 23:07:17,077 INFO L268 CegarLoopResult]: For program point L33(lines 33 34) no Hoare annotation was computed. [2020-08-21 23:07:17,077 INFO L268 CegarLoopResult]: For program point L21(lines 14 45) no Hoare annotation was computed. [2020-08-21 23:07:17,077 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 45) no Hoare annotation was computed. [2020-08-21 23:07:17,077 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-08-21 23:07:17,078 INFO L264 CegarLoopResult]: At program point L38(line 38) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-21 23:07:17,079 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (< main_~buf~0 main_~buflim~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0)) [2020-08-21 23:07:17,079 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 45) the Hoare annotation is: true [2020-08-21 23:07:17,080 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (< main_~buf~0 main_~buflim~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0)) [2020-08-21 23:07:17,080 INFO L268 CegarLoopResult]: For program point L26-1(lines 26 37) no Hoare annotation was computed. [2020-08-21 23:07:17,080 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 37) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-21 23:07:17,081 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-08-21 23:07:17,081 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-21 23:07:17,082 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 main_~buf~0) (< main_~buf~0 (+ main_~buflim~0 1)) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (<= 1 main_~in~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0)) [2020-08-21 23:07:17,082 INFO L264 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (and (<= 0 main_~buf~0) (< main_~buf~0 (+ main_~buflim~0 1)) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (<= 1 main_~in~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0)) [2020-08-21 23:07:17,082 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-21 23:07:17,082 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-21 23:07:17,082 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 23:07:17,082 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-21 23:07:17,082 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-21 23:07:17,083 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-21 23:07:17,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:07:17 BoogieIcfgContainer [2020-08-21 23:07:17,106 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 23:07:17,109 INFO L168 Benchmark]: Toolchain (without parser) took 5762.23 ms. Allocated memory was 139.5 MB in the beginning and 275.8 MB in the end (delta: 136.3 MB). Free memory was 102.9 MB in the beginning and 133.7 MB in the end (delta: -30.8 MB). Peak memory consumption was 105.5 MB. Max. memory is 7.1 GB. [2020-08-21 23:07:17,110 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 23:07:17,113 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.04 ms. Allocated memory is still 139.5 MB. Free memory was 102.7 MB in the beginning and 92.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-21 23:07:17,117 INFO L168 Benchmark]: Boogie Preprocessor took 109.58 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.6 MB in the beginning and 181.8 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-08-21 23:07:17,118 INFO L168 Benchmark]: RCFGBuilder took 347.49 ms. Allocated memory is still 201.9 MB. Free memory was 181.8 MB in the beginning and 165.6 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2020-08-21 23:07:17,119 INFO L168 Benchmark]: TraceAbstraction took 5047.98 ms. Allocated memory was 201.9 MB in the beginning and 275.8 MB in the end (delta: 73.9 MB). Free memory was 164.9 MB in the beginning and 133.7 MB in the end (delta: 31.2 MB). Peak memory consumption was 105.1 MB. Max. memory is 7.1 GB. [2020-08-21 23:07:17,128 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.04 ms. Allocated memory is still 139.5 MB. Free memory was 102.7 MB in the beginning and 92.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.58 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.6 MB in the beginning and 181.8 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 347.49 ms. Allocated memory is still 201.9 MB. Free memory was 181.8 MB in the beginning and 165.6 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5047.98 ms. Allocated memory was 201.9 MB in the beginning and 275.8 MB in the end (delta: 73.9 MB). Free memory was 164.9 MB in the beginning and 133.7 MB in the end (delta: 31.2 MB). Peak memory consumption was 105.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: ((((0 <= buf && buf < buflim + 1) && buflim + 2 <= bufferlen) && in + buflim + 3 <= buf + inlen) && bufferlen + 1 <= inlen) && 0 <= in - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.5s, OverallIterations: 11, TraceHistogramMax: 16, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 422 SDtfs, 351 SDslu, 1324 SDs, 0 SdLazy, 750 SolverSat, 329 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 43 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 54 PreInvPairs, 91 NumberOfFragments, 206 HoareAnnotationTreeSize, 54 FomulaSimplifications, 1422 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 15 FomulaSimplificationsInter, 705 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 527 NumberOfCodeBlocks, 527 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 516 ConstructedInterpolants, 0 QuantifiedInterpolants, 111624 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 1182/1281 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...