/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:06:25,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:06:25,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:06:25,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 01:06:25,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:06:25,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:06:25,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:06:25,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:06:25,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:06:25,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:06:25,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:06:25,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:06:25,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:06:25,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:06:25,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:06:25,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:06:25,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:06:25,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:06:25,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:06:25,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:06:25,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:06:25,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:06:25,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:06:25,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:06:25,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 01:06:25,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 01:06:25,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 01:06:25,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 01:06:25,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 01:06:25,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 01:06:25,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:06:25,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:06:25,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:06:25,142 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 [2020-08-19 01:06:25,166 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:06:25,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:06:25,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:06:25,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:06:25,168 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:06:25,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:06:25,168 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:06:25,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:06:25,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:06:25,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:06:25,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:06:25,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:06:25,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:06:25,170 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:06:25,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:06:25,170 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:06:25,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:06:25,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:06:25,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:06:25,171 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:06:25,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:06:25,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:06:25,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:06:25,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:06:25,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:06:25,172 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:06:25,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:06:25,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:06:25,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:06:25,173 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=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; [2020-08-19 01:06:25,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:06:25,523 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:06:25,527 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:06:25,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:06:25,530 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:06:25,531 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-08-19 01:06:25,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e77cd2608/30261bf04327425592a636a718a90252/FLAG9a70cefc9 [2020-08-19 01:06:26,089 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:06:26,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-08-19 01:06:26,102 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e77cd2608/30261bf04327425592a636a718a90252/FLAG9a70cefc9 [2020-08-19 01:06:26,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e77cd2608/30261bf04327425592a636a718a90252 [2020-08-19 01:06:26,394 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:06:26,396 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:06:26,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:06:26,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:06:26,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:06:26,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:06:26" (1/1) ... [2020-08-19 01:06:26,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74517853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:26, skipping insertion in model container [2020-08-19 01:06:26,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:06:26" (1/1) ... [2020-08-19 01:06:26,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:06:26,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:06:26,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:06:26,707 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:06:26,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:06:26,872 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:06:26,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:26 WrapperNode [2020-08-19 01:06:26,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:06:26,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:06:26,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:06:26,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:06:26,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:26" (1/1) ... [2020-08-19 01:06:26,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:26" (1/1) ... [2020-08-19 01:06:26,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:26" (1/1) ... [2020-08-19 01:06:26,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:26" (1/1) ... [2020-08-19 01:06:26,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:26" (1/1) ... [2020-08-19 01:06:26,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:26" (1/1) ... [2020-08-19 01:06:26,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:26" (1/1) ... [2020-08-19 01:06:26,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:06:26,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:06:26,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:06:26,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:06:26,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:26" (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 [2020-08-19 01:06:26,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:06:26,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:06:26,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 01:06:26,984 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-19 01:06:26,984 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-19 01:06:26,984 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-19 01:06:26,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:06:26,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:06:26,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 01:06:26,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-19 01:06:26,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 01:06:26,985 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-19 01:06:26,986 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-19 01:06:26,986 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-19 01:06:26,986 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:06:26,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:06:26,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:06:27,450 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:06:27,450 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-19 01:06:27,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:06:27 BoogieIcfgContainer [2020-08-19 01:06:27,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:06:27,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:06:27,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:06:27,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:06:27,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:06:26" (1/3) ... [2020-08-19 01:06:27,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eecd46b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:06:27, skipping insertion in model container [2020-08-19 01:06:27,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:06:26" (2/3) ... [2020-08-19 01:06:27,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eecd46b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:06:27, skipping insertion in model container [2020-08-19 01:06:27,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:06:27" (3/3) ... [2020-08-19 01:06:27,464 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2020-08-19 01:06:27,474 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:06:27,486 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:06:27,500 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:06:27,531 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:06:27,532 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:06:27,532 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:06:27,532 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:06:27,532 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:06:27,532 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:06:27,533 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:06:27,533 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:06:27,552 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-08-19 01:06:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-19 01:06:27,560 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:06:27,561 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:06:27,562 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:06:27,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:06:27,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1312098946, now seen corresponding path program 1 times [2020-08-19 01:06:27,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:06:27,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415906959] [2020-08-19 01:06:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:06:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:27,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:06:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:27,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:06:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:28,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:06:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:28,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-19 01:06:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-19 01:06:28,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415906959] [2020-08-19 01:06:28,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:06:28,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 01:06:28,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775168744] [2020-08-19 01:06:28,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 01:06:28,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:06:28,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 01:06:28,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 01:06:28,135 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 9 states. [2020-08-19 01:06:28,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:06:28,386 INFO L93 Difference]: Finished difference Result 146 states and 224 transitions. [2020-08-19 01:06:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 01:06:28,389 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-08-19 01:06:28,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:06:28,402 INFO L225 Difference]: With dead ends: 146 [2020-08-19 01:06:28,403 INFO L226 Difference]: Without dead ends: 86 [2020-08-19 01:06:28,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-19 01:06:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-19 01:06:28,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-08-19 01:06:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-19 01:06:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-08-19 01:06:28,475 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 34 [2020-08-19 01:06:28,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:06:28,476 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-08-19 01:06:28,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 01:06:28,476 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-08-19 01:06:28,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-19 01:06:28,479 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:06:28,480 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:06:28,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:06:28,481 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:06:28,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:06:28,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1254840644, now seen corresponding path program 1 times [2020-08-19 01:06:28,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:06:28,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276631504] [2020-08-19 01:06:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:06:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:28,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:06:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:28,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:06:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:28,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:06:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:28,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-19 01:06:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-19 01:06:28,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276631504] [2020-08-19 01:06:28,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:06:28,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 01:06:28,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752897269] [2020-08-19 01:06:28,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 01:06:28,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:06:28,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 01:06:28,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:06:28,708 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 8 states. [2020-08-19 01:06:28,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:06:28,839 INFO L93 Difference]: Finished difference Result 140 states and 193 transitions. [2020-08-19 01:06:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 01:06:28,840 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-08-19 01:06:28,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:06:28,842 INFO L225 Difference]: With dead ends: 140 [2020-08-19 01:06:28,843 INFO L226 Difference]: Without dead ends: 99 [2020-08-19 01:06:28,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-19 01:06:28,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-19 01:06:28,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2020-08-19 01:06:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-19 01:06:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 114 transitions. [2020-08-19 01:06:28,864 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 114 transitions. Word has length 34 [2020-08-19 01:06:28,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:06:28,864 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 114 transitions. [2020-08-19 01:06:28,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 01:06:28,864 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 114 transitions. [2020-08-19 01:06:28,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-19 01:06:28,866 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:06:28,867 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:06:28,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:06:28,867 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:06:28,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:06:28,868 INFO L82 PathProgramCache]: Analyzing trace with hash 894544493, now seen corresponding path program 1 times [2020-08-19 01:06:28,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:06:28,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605497725] [2020-08-19 01:06:28,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:06:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:29,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:06:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:29,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:06:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:29,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:06:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:29,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-19 01:06:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-19 01:06:29,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605497725] [2020-08-19 01:06:29,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:06:29,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 01:06:29,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641564369] [2020-08-19 01:06:29,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 01:06:29,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:06:29,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 01:06:29,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-19 01:06:29,219 INFO L87 Difference]: Start difference. First operand 84 states and 114 transitions. Second operand 12 states. [2020-08-19 01:06:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:06:29,429 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2020-08-19 01:06:29,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 01:06:29,430 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-08-19 01:06:29,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:06:29,432 INFO L225 Difference]: With dead ends: 152 [2020-08-19 01:06:29,432 INFO L226 Difference]: Without dead ends: 111 [2020-08-19 01:06:29,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-19 01:06:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-19 01:06:29,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 95. [2020-08-19 01:06:29,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-19 01:06:29,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2020-08-19 01:06:29,451 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 38 [2020-08-19 01:06:29,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:06:29,452 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2020-08-19 01:06:29,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 01:06:29,452 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2020-08-19 01:06:29,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-19 01:06:29,454 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:06:29,455 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:06:29,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 01:06:29,455 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:06:29,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:06:29,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1876990799, now seen corresponding path program 1 times [2020-08-19 01:06:29,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:06:29,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250256880] [2020-08-19 01:06:29,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:06:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:29,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:06:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:29,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:06:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:29,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:06:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:29,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-19 01:06:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-19 01:06:29,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250256880] [2020-08-19 01:06:29,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:06:29,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 01:06:29,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712092354] [2020-08-19 01:06:29,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 01:06:29,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:06:29,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 01:06:29,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 01:06:29,653 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand 9 states. [2020-08-19 01:06:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:06:29,850 INFO L93 Difference]: Finished difference Result 147 states and 194 transitions. [2020-08-19 01:06:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 01:06:29,851 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-19 01:06:29,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:06:29,853 INFO L225 Difference]: With dead ends: 147 [2020-08-19 01:06:29,853 INFO L226 Difference]: Without dead ends: 107 [2020-08-19 01:06:29,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-19 01:06:29,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-08-19 01:06:29,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-08-19 01:06:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-19 01:06:29,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 111 transitions. [2020-08-19 01:06:29,883 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 111 transitions. Word has length 38 [2020-08-19 01:06:29,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:06:29,883 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 111 transitions. [2020-08-19 01:06:29,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 01:06:29,883 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 111 transitions. [2020-08-19 01:06:29,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-19 01:06:29,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:06:29,888 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:06:29,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 01:06:29,888 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:06:29,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:06:29,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2083243036, now seen corresponding path program 1 times [2020-08-19 01:06:29,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:06:29,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984569086] [2020-08-19 01:06:29,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:06:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:29,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:06:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:29,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:06:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:29,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:06:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:30,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-19 01:06:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:30,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-19 01:06:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-19 01:06:30,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984569086] [2020-08-19 01:06:30,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:06:30,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 01:06:30,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540870883] [2020-08-19 01:06:30,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 01:06:30,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:06:30,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 01:06:30,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 01:06:30,047 INFO L87 Difference]: Start difference. First operand 85 states and 111 transitions. Second operand 9 states. [2020-08-19 01:06:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:06:30,209 INFO L93 Difference]: Finished difference Result 134 states and 178 transitions. [2020-08-19 01:06:30,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 01:06:30,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-08-19 01:06:30,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:06:30,212 INFO L225 Difference]: With dead ends: 134 [2020-08-19 01:06:30,212 INFO L226 Difference]: Without dead ends: 111 [2020-08-19 01:06:30,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-19 01:06:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-19 01:06:30,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2020-08-19 01:06:30,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-19 01:06:30,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2020-08-19 01:06:30,241 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 42 [2020-08-19 01:06:30,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:06:30,242 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2020-08-19 01:06:30,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 01:06:30,242 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2020-08-19 01:06:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-19 01:06:30,244 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:06:30,244 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:06:30,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 01:06:30,245 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:06:30,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:06:30,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2140501338, now seen corresponding path program 1 times [2020-08-19 01:06:30,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:06:30,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439859909] [2020-08-19 01:06:30,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:06:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:30,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:06:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:30,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:06:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:30,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:06:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:30,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-19 01:06:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:30,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-19 01:06:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-19 01:06:30,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439859909] [2020-08-19 01:06:30,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:06:30,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 01:06:30,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921874818] [2020-08-19 01:06:30,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 01:06:30,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:06:30,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 01:06:30,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:06:30,450 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand 8 states. [2020-08-19 01:06:30,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:06:30,556 INFO L93 Difference]: Finished difference Result 163 states and 218 transitions. [2020-08-19 01:06:30,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 01:06:30,556 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-08-19 01:06:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:06:30,560 INFO L225 Difference]: With dead ends: 163 [2020-08-19 01:06:30,561 INFO L226 Difference]: Without dead ends: 126 [2020-08-19 01:06:30,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-19 01:06:30,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-19 01:06:30,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 113. [2020-08-19 01:06:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-19 01:06:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2020-08-19 01:06:30,587 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 42 [2020-08-19 01:06:30,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:06:30,588 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2020-08-19 01:06:30,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 01:06:30,588 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2020-08-19 01:06:30,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-19 01:06:30,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:06:30,593 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:06:30,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 01:06:30,593 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:06:30,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:06:30,594 INFO L82 PathProgramCache]: Analyzing trace with hash 424074718, now seen corresponding path program 1 times [2020-08-19 01:06:30,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:06:30,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356298622] [2020-08-19 01:06:30,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:06:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:30,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:06:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:30,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:06:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:30,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:06:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:30,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 01:06:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-19 01:06:30,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356298622] [2020-08-19 01:06:30,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:06:30,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 01:06:30,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975500876] [2020-08-19 01:06:30,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 01:06:30,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:06:30,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 01:06:30,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:06:30,792 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand 8 states. [2020-08-19 01:06:30,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:06:30,919 INFO L93 Difference]: Finished difference Result 177 states and 237 transitions. [2020-08-19 01:06:30,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 01:06:30,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-08-19 01:06:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:06:30,922 INFO L225 Difference]: With dead ends: 177 [2020-08-19 01:06:30,922 INFO L226 Difference]: Without dead ends: 149 [2020-08-19 01:06:30,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-19 01:06:30,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-19 01:06:30,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 140. [2020-08-19 01:06:30,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 01:06:30,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2020-08-19 01:06:30,944 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 42 [2020-08-19 01:06:30,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:06:30,945 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2020-08-19 01:06:30,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 01:06:30,945 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2020-08-19 01:06:30,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-19 01:06:30,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:06:30,946 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:06:30,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 01:06:30,947 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:06:30,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:06:30,963 INFO L82 PathProgramCache]: Analyzing trace with hash 481333020, now seen corresponding path program 2 times [2020-08-19 01:06:30,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:06:30,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525296898] [2020-08-19 01:06:30,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:06:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:31,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:06:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:31,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:06:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:31,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:06:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:31,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 01:06:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:06:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-19 01:06:31,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525296898] [2020-08-19 01:06:31,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:06:31,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-19 01:06:31,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483888315] [2020-08-19 01:06:31,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 01:06:31,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:06:31,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 01:06:31,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-19 01:06:31,287 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand 13 states. [2020-08-19 01:06:31,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:06:31,693 INFO L93 Difference]: Finished difference Result 222 states and 296 transitions. [2020-08-19 01:06:31,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 01:06:31,694 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-08-19 01:06:31,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:06:31,696 INFO L225 Difference]: With dead ends: 222 [2020-08-19 01:06:31,697 INFO L226 Difference]: Without dead ends: 198 [2020-08-19 01:06:31,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-08-19 01:06:31,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-08-19 01:06:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 178. [2020-08-19 01:06:31,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-08-19 01:06:31,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 236 transitions. [2020-08-19 01:06:31,715 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 236 transitions. Word has length 42 [2020-08-19 01:06:31,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:06:31,716 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 236 transitions. [2020-08-19 01:06:31,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 01:06:31,716 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 236 transitions. [2020-08-19 01:06:31,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-19 01:06:31,717 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:06:31,717 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:06:31,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 01:06:31,718 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:06:31,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:06:31,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2004765024, now seen corresponding path program 1 times [2020-08-19 01:06:31,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:06:31,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435253607] [2020-08-19 01:06:31,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:06:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 01:06:31,734 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 01:06:31,734 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 01:06:31,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 01:06:31,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:06:31 BoogieIcfgContainer [2020-08-19 01:06:31,760 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:06:31,762 INFO L168 Benchmark]: Toolchain (without parser) took 5365.95 ms. Allocated memory was 139.5 MB in the beginning and 245.9 MB in the end (delta: 106.4 MB). Free memory was 102.1 MB in the beginning and 122.0 MB in the end (delta: -19.9 MB). Peak memory consumption was 86.5 MB. Max. memory is 7.1 GB. [2020-08-19 01:06:31,763 INFO L168 Benchmark]: CDTParser took 0.23 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. [2020-08-19 01:06:31,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 475.56 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.9 MB in the beginning and 179.0 MB in the end (delta: -77.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-08-19 01:06:31,765 INFO L168 Benchmark]: Boogie Preprocessor took 41.98 ms. Allocated memory is still 202.4 MB. Free memory was 179.0 MB in the beginning and 177.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-08-19 01:06:31,766 INFO L168 Benchmark]: RCFGBuilder took 539.99 ms. Allocated memory is still 202.4 MB. Free memory was 177.1 MB in the beginning and 152.4 MB in the end (delta: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-08-19 01:06:31,767 INFO L168 Benchmark]: TraceAbstraction took 4303.44 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 151.8 MB in the beginning and 122.0 MB in the end (delta: 29.8 MB). Peak memory consumption was 73.3 MB. Max. memory is 7.1 GB. [2020-08-19 01:06:31,770 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 475.56 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.9 MB in the beginning and 179.0 MB in the end (delta: -77.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.98 ms. Allocated memory is still 202.4 MB. Free memory was 179.0 MB in the beginning and 177.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 539.99 ms. Allocated memory is still 202.4 MB. Free memory was 177.1 MB in the beginning and 152.4 MB in the end (delta: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4303.44 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 151.8 MB in the beginning and 122.0 MB in the end (delta: 29.8 MB). Peak memory consumption was 73.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 7]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 100, overapproximation of bitwiseAnd at line 98. Possible FailurePath: [L216] unsigned int a ; [L217] unsigned int ma = __VERIFIER_nondet_uint(); [L218] signed char ea = __VERIFIER_nondet_char(); [L219] unsigned int b ; [L220] unsigned int mb = __VERIFIER_nondet_uint(); [L221] signed char eb = __VERIFIER_nondet_char(); [L222] unsigned int r_add1 ; [L223] unsigned int r_add2 ; [L224] unsigned int zero ; [L225] int tmp ; [L226] int tmp___0 ; [L227] int __retres14 ; [L231] CALL, EXPR base2flt(0, 0) [L15] unsigned int res ; [L16] unsigned int __retres4 ; [L19] COND TRUE ! m [L20] __retres4 = 0U [L70] return (__retres4); [L231] RET, EXPR base2flt(0, 0) [L231] zero = base2flt(0, 0) [L232] CALL, EXPR base2flt(ma, ea) [L15] unsigned int res ; [L16] unsigned int __retres4 ; [L19] COND FALSE !(! m) [L25] COND FALSE !(m < 1U << 24U) [L47] COND TRUE 1 [L49] COND TRUE m >= 1U << 25U [L54] COND TRUE e >= 127 [L55] __retres4 = 4294967295U [L70] return (__retres4); [L232] RET, EXPR base2flt(ma, ea) [L232] a = base2flt(ma, ea) [L233] CALL, EXPR base2flt(mb, eb) [L15] unsigned int res ; [L16] unsigned int __retres4 ; [L19] COND FALSE !(! m) [L25] COND FALSE !(m < 1U << 24U) [L47] COND TRUE 1 [L49] COND FALSE !(m >= 1U << 25U) [L66] m = m & ~ (1U << 24U) [L67] res = m | ((unsigned int )(e + 128) << 24U) [L68] __retres4 = res [L70] return (__retres4); [L233] RET, EXPR base2flt(mb, eb) [L233] b = base2flt(mb, eb) [L234] CALL addflt(a, b) [L74] unsigned int res ; [L75] unsigned int ma ; [L76] unsigned int mb ; [L77] unsigned int delta ; [L78] int ea ; [L79] int eb ; [L80] unsigned int tmp ; [L81] unsigned int __retres10 ; [L84] COND FALSE !(a < b) [L91] COND FALSE !(! b) [L98] ma = a & ((1U << 24U) - 1U) [L99] ea = (int )(a >> 24U) - 128 [L100] ma = ma | (1U << 24U) [L101] mb = b & ((1U << 24U) - 1U) [L102] eb = (int )(b >> 24U) - 128 [L103] mb = mb | (1U << 24U) [L104] CALL __VERIFIER_assert(ea >= eb) [L6] COND TRUE !(cond) [L7] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.2s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 671 SDtfs, 266 SDslu, 4761 SDs, 0 SdLazy, 700 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=178occurred in iteration=8, 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, 8 MinimizatonAttempts, 113 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 354 NumberOfCodeBlocks, 354 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 304 ConstructedInterpolants, 0 QuantifiedInterpolants, 35226 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 119/134 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...