/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 -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 0.1.25-72570d3 [2020-08-22 16:17:59,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:17:59,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:17:59,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:17:59,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:17:59,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:17:59,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:17:59,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:17:59,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:17:59,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:17:59,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:17:59,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:17:59,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:17:59,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:17:59,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:17:59,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:17:59,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:17:59,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:17:59,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:17:59,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:17:59,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:17:59,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:17:59,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:17:59,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:17:59,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:17:59,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:17:59,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:17:59,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:17:59,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 16:17:59,441 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:17:59,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:17:59,443 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:17:59,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:17:59,444 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:17:59,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:17:59,444 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:17:59,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:17:59,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:17:59,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:17:59,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:17:59,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:17:59,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:17:59,446 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:17:59,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:17:59,447 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:17:59,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:17:59,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:17:59,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:17:59,447 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:17:59,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:17:59,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:17:59,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:17:59,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:17:59,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:17:59,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:17:59,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:17:59,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:17:59,449 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:17:59,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:17:59,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:17:59,794 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:17:59,797 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:17:59,799 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:17:59,799 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:17:59,800 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-08-22 16:17:59,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40c6138a/8d5a679fb8e84d0185d8ccea29ff42c7/FLAG14714e59c [2020-08-22 16:18:00,316 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:18:00,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-08-22 16:18:00,327 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40c6138a/8d5a679fb8e84d0185d8ccea29ff42c7/FLAG14714e59c [2020-08-22 16:18:00,671 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40c6138a/8d5a679fb8e84d0185d8ccea29ff42c7 [2020-08-22 16:18:00,681 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:18:00,682 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:18:00,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:18:00,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:18:00,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:18:00,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:18:00" (1/1) ... [2020-08-22 16:18:00,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72d025ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:00, skipping insertion in model container [2020-08-22 16:18:00,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:18:00" (1/1) ... [2020-08-22 16:18:00,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:18:00,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:18:00,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:18:00,956 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:18:01,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:18:01,117 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:18:01,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:01 WrapperNode [2020-08-22 16:18:01,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:18:01,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:18:01,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:18:01,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:18:01,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:01" (1/1) ... [2020-08-22 16:18:01,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:01" (1/1) ... [2020-08-22 16:18:01,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:01" (1/1) ... [2020-08-22 16:18:01,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:01" (1/1) ... [2020-08-22 16:18:01,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:01" (1/1) ... [2020-08-22 16:18:01,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:01" (1/1) ... [2020-08-22 16:18:01,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:01" (1/1) ... [2020-08-22 16:18:01,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:18:01,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:18:01,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:18:01,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:18:01,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:18:01,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:18:01,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:18:01,228 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:18:01,228 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-22 16:18:01,228 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-22 16:18:01,228 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-22 16:18:01,228 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:18:01,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:18:01,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 16:18:01,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 16:18:01,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:18:01,229 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-22 16:18:01,229 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-22 16:18:01,229 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-22 16:18:01,230 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:18:01,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:18:01,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:18:01,760 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:18:01,760 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 16:18:01,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:18:01 BoogieIcfgContainer [2020-08-22 16:18:01,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:18:01,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:18:01,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:18:01,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:18:01,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:18:00" (1/3) ... [2020-08-22 16:18:01,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8db7e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:18:01, skipping insertion in model container [2020-08-22 16:18:01,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:18:01" (2/3) ... [2020-08-22 16:18:01,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8db7e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:18:01, skipping insertion in model container [2020-08-22 16:18:01,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:18:01" (3/3) ... [2020-08-22 16:18:01,774 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2020-08-22 16:18:01,785 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:18:01,794 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:18:01,808 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:18:01,831 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:18:01,831 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:18:01,831 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:18:01,831 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:18:01,832 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:18:01,832 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:18:01,832 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:18:01,832 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:18:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-08-22 16:18:01,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 16:18:01,858 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:01,859 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] [2020-08-22 16:18:01,860 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:01,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:01,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1312098946, now seen corresponding path program 1 times [2020-08-22 16:18:01,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:01,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908766394] [2020-08-22 16:18:01,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:18:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 16:18:02,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908766394] [2020-08-22 16:18:02,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004874333] [2020-08-22 16:18:02,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:02,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2020-08-22 16:18:02,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:02,669 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_mod_30 already exists [2020-08-22 16:18:02,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:02,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 16:18:02,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982190821] [2020-08-22 16:18:02,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:18:02,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:02,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:18:02,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:18:02,694 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 9 states. [2020-08-22 16:18:02,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:02,950 INFO L93 Difference]: Finished difference Result 146 states and 224 transitions. [2020-08-22 16:18:02,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:18:02,952 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-08-22 16:18:02,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:02,965 INFO L225 Difference]: With dead ends: 146 [2020-08-22 16:18:02,965 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 16:18:02,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:18:02,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 16:18:03,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-08-22 16:18:03,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 16:18:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-08-22 16:18:03,028 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 34 [2020-08-22 16:18:03,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:03,028 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-08-22 16:18:03,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:18:03,029 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-08-22 16:18:03,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 16:18:03,032 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:03,032 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] [2020-08-22 16:18:03,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-08-22 16:18:03,248 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:03,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:03,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1254840644, now seen corresponding path program 1 times [2020-08-22 16:18:03,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:03,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470567684] [2020-08-22 16:18:03,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:03,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:03,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:03,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:03,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:18:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 16:18:03,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470567684] [2020-08-22 16:18:03,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:18:03,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 16:18:03,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657678008] [2020-08-22 16:18:03,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:18:03,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:03,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:18:03,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:18:03,555 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 8 states. [2020-08-22 16:18:03,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:03,713 INFO L93 Difference]: Finished difference Result 140 states and 193 transitions. [2020-08-22 16:18:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:18:03,716 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-08-22 16:18:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:03,720 INFO L225 Difference]: With dead ends: 140 [2020-08-22 16:18:03,720 INFO L226 Difference]: Without dead ends: 99 [2020-08-22 16:18:03,726 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 [2020-08-22 16:18:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-22 16:18:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2020-08-22 16:18:03,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 16:18:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 114 transitions. [2020-08-22 16:18:03,767 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 114 transitions. Word has length 34 [2020-08-22 16:18:03,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:03,768 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 114 transitions. [2020-08-22 16:18:03,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:18:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 114 transitions. [2020-08-22 16:18:03,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 16:18:03,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:03,771 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] [2020-08-22 16:18:03,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:18:03,771 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:03,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:03,772 INFO L82 PathProgramCache]: Analyzing trace with hash 894544493, now seen corresponding path program 1 times [2020-08-22 16:18:03,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:03,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201884634] [2020-08-22 16:18:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:03,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:03,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:03,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:18:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:18:04,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201884634] [2020-08-22 16:18:04,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29788513] [2020-08-22 16:18:04,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2020-08-22 16:18:04,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:04,347 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_42 already exists [2020-08-22 16:18:04,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:04,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 16:18:04,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987360832] [2020-08-22 16:18:04,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 16:18:04,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:04,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 16:18:04,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:18:04,352 INFO L87 Difference]: Start difference. First operand 84 states and 114 transitions. Second operand 12 states. [2020-08-22 16:18:04,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:04,595 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2020-08-22 16:18:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 16:18:04,596 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-08-22 16:18:04,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:04,598 INFO L225 Difference]: With dead ends: 152 [2020-08-22 16:18:04,599 INFO L226 Difference]: Without dead ends: 111 [2020-08-22 16:18:04,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:18:04,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-22 16:18:04,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 95. [2020-08-22 16:18:04,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 16:18:04,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2020-08-22 16:18:04,615 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 38 [2020-08-22 16:18:04,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:04,615 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2020-08-22 16:18:04,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 16:18:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2020-08-22 16:18:04,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 16:18:04,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:04,618 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] [2020-08-22 16:18:04,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:04,833 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:04,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:04,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1876990799, now seen corresponding path program 1 times [2020-08-22 16:18:04,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:04,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070512248] [2020-08-22 16:18:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:18:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 16:18:04,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070512248] [2020-08-22 16:18:04,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23654499] [2020-08-22 16:18:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2020-08-22 16:18:05,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 16:18:05,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:18:05,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-08-22 16:18:05,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559804741] [2020-08-22 16:18:05,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:18:05,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:05,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:18:05,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:18:05,262 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand 9 states. [2020-08-22 16:18:05,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:05,423 INFO L93 Difference]: Finished difference Result 147 states and 194 transitions. [2020-08-22 16:18:05,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:18:05,424 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-22 16:18:05,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:05,426 INFO L225 Difference]: With dead ends: 147 [2020-08-22 16:18:05,426 INFO L226 Difference]: Without dead ends: 107 [2020-08-22 16:18:05,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:18:05,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-08-22 16:18:05,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-08-22 16:18:05,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 16:18:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 111 transitions. [2020-08-22 16:18:05,441 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 111 transitions. Word has length 38 [2020-08-22 16:18:05,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:05,442 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 111 transitions. [2020-08-22 16:18:05,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:18:05,442 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 111 transitions. [2020-08-22 16:18:05,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 16:18:05,444 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:05,444 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] [2020-08-22 16:18:05,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:05,660 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:05,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:05,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2083243036, now seen corresponding path program 1 times [2020-08-22 16:18:05,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:05,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449580062] [2020-08-22 16:18:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:18:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 16:18:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 16:18:05,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449580062] [2020-08-22 16:18:05,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:18:05,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 16:18:05,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245204470] [2020-08-22 16:18:05,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:18:05,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:05,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:18:05,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:18:05,812 INFO L87 Difference]: Start difference. First operand 85 states and 111 transitions. Second operand 9 states. [2020-08-22 16:18:05,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:05,953 INFO L93 Difference]: Finished difference Result 134 states and 178 transitions. [2020-08-22 16:18:05,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:18:05,953 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-08-22 16:18:05,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:05,955 INFO L225 Difference]: With dead ends: 134 [2020-08-22 16:18:05,955 INFO L226 Difference]: Without dead ends: 111 [2020-08-22 16:18:05,956 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 [2020-08-22 16:18:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-22 16:18:05,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2020-08-22 16:18:05,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-22 16:18:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2020-08-22 16:18:05,968 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 42 [2020-08-22 16:18:05,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:05,969 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2020-08-22 16:18:05,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:18:05,969 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2020-08-22 16:18:05,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 16:18:05,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:05,971 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] [2020-08-22 16:18:05,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 16:18:05,971 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:05,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:05,972 INFO L82 PathProgramCache]: Analyzing trace with hash 2140501338, now seen corresponding path program 1 times [2020-08-22 16:18:05,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:05,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271996837] [2020-08-22 16:18:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:18:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 16:18:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 16:18:06,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271996837] [2020-08-22 16:18:06,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458385273] [2020-08-22 16:18:06,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-08-22 16:18:06,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:06,320 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_42 already exists [2020-08-22 16:18:06,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:06,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 16:18:06,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742748950] [2020-08-22 16:18:06,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:18:06,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:06,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:18:06,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:18:06,322 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand 8 states. [2020-08-22 16:18:06,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:06,426 INFO L93 Difference]: Finished difference Result 163 states and 218 transitions. [2020-08-22 16:18:06,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:18:06,427 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-08-22 16:18:06,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:06,429 INFO L225 Difference]: With dead ends: 163 [2020-08-22 16:18:06,429 INFO L226 Difference]: Without dead ends: 126 [2020-08-22 16:18:06,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:18:06,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-22 16:18:06,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 113. [2020-08-22 16:18:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 16:18:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2020-08-22 16:18:06,442 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 42 [2020-08-22 16:18:06,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:06,442 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2020-08-22 16:18:06,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:18:06,442 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2020-08-22 16:18:06,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 16:18:06,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:06,444 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] [2020-08-22 16:18:06,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:06,658 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:06,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:06,659 INFO L82 PathProgramCache]: Analyzing trace with hash 424074718, now seen corresponding path program 1 times [2020-08-22 16:18:06,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:06,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023528346] [2020-08-22 16:18:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:18:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-22 16:18:06,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023528346] [2020-08-22 16:18:06,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641031701] [2020-08-22 16:18:06,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:18:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:06,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 35 conjunts are in the unsatisfiable core [2020-08-22 16:18:06,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:18:07,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-08-22 16:18:07,037 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_53 already exists [2020-08-22 16:18:07,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:18:07,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 16:18:07,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239473481] [2020-08-22 16:18:07,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:18:07,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:07,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:18:07,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:18:07,046 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand 8 states. [2020-08-22 16:18:07,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:07,164 INFO L93 Difference]: Finished difference Result 177 states and 237 transitions. [2020-08-22 16:18:07,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:18:07,165 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-08-22 16:18:07,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:07,167 INFO L225 Difference]: With dead ends: 177 [2020-08-22 16:18:07,167 INFO L226 Difference]: Without dead ends: 149 [2020-08-22 16:18:07,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:18:07,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-22 16:18:07,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 140. [2020-08-22 16:18:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 16:18:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2020-08-22 16:18:07,187 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 42 [2020-08-22 16:18:07,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:07,187 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2020-08-22 16:18:07,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:18:07,187 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2020-08-22 16:18:07,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 16:18:07,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:07,191 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] [2020-08-22 16:18:07,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-08-22 16:18:07,407 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:07,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:07,408 INFO L82 PathProgramCache]: Analyzing trace with hash 481333020, now seen corresponding path program 2 times [2020-08-22 16:18:07,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:07,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202996056] [2020-08-22 16:18:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:18:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:18:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 16:18:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:18:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:18:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-22 16:18:07,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202996056] [2020-08-22 16:18:07,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:18:07,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 16:18:07,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478325703] [2020-08-22 16:18:07,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 16:18:07,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:18:07,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 16:18:07,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:18:07,698 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand 13 states. [2020-08-22 16:18:08,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:18:08,116 INFO L93 Difference]: Finished difference Result 222 states and 296 transitions. [2020-08-22 16:18:08,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 16:18:08,117 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-08-22 16:18:08,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:18:08,121 INFO L225 Difference]: With dead ends: 222 [2020-08-22 16:18:08,121 INFO L226 Difference]: Without dead ends: 198 [2020-08-22 16:18:08,122 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 [2020-08-22 16:18:08,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-08-22 16:18:08,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 178. [2020-08-22 16:18:08,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-08-22 16:18:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 236 transitions. [2020-08-22 16:18:08,145 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 236 transitions. Word has length 42 [2020-08-22 16:18:08,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:18:08,147 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 236 transitions. [2020-08-22 16:18:08,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 16:18:08,148 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 236 transitions. [2020-08-22 16:18:08,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 16:18:08,149 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:18:08,149 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] [2020-08-22 16:18:08,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 16:18:08,149 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:18:08,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:18:08,150 INFO L82 PathProgramCache]: Analyzing trace with hash 2004765024, now seen corresponding path program 1 times [2020-08-22 16:18:08,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:18:08,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774331933] [2020-08-22 16:18:08,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:18:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:18:08,181 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:18:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:18:08,198 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:18:08,220 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:18:08,221 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:18:08,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 16:18:08,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:18:08 BoogieIcfgContainer [2020-08-22 16:18:08,274 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:18:08,277 INFO L168 Benchmark]: Toolchain (without parser) took 7593.98 ms. Allocated memory was 138.4 MB in the beginning and 278.4 MB in the end (delta: 140.0 MB). Free memory was 101.1 MB in the beginning and 157.5 MB in the end (delta: -56.4 MB). Peak memory consumption was 83.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:18:08,279 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 16:18:08,279 INFO L168 Benchmark]: CACSL2BoogieTranslator took 434.75 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 100.9 MB in the beginning and 177.9 MB in the end (delta: -77.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-08-22 16:18:08,283 INFO L168 Benchmark]: Boogie Preprocessor took 41.86 ms. Allocated memory is still 201.3 MB. Free memory was 177.9 MB in the beginning and 175.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:18:08,286 INFO L168 Benchmark]: RCFGBuilder took 605.29 ms. Allocated memory is still 201.3 MB. Free memory was 175.5 MB in the beginning and 151.0 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:18:08,287 INFO L168 Benchmark]: TraceAbstraction took 6507.09 ms. Allocated memory was 201.3 MB in the beginning and 278.4 MB in the end (delta: 77.1 MB). Free memory was 150.4 MB in the beginning and 157.5 MB in the end (delta: -7.2 MB). Peak memory consumption was 69.9 MB. Max. memory is 7.1 GB. [2020-08-22 16:18:08,297 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 434.75 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 100.9 MB in the beginning and 177.9 MB in the end (delta: -77.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.86 ms. Allocated memory is still 201.3 MB. Free memory was 177.9 MB in the beginning and 175.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 605.29 ms. Allocated memory is still 201.3 MB. Free memory was 175.5 MB in the beginning and 151.0 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6507.09 ms. Allocated memory was 201.3 MB in the beginning and 278.4 MB in the end (delta: 77.1 MB). Free memory was 150.4 MB in the beginning and 157.5 MB in the end (delta: -7.2 MB). Peak memory consumption was 69.9 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 ; VAL [ea=127, eb=0, ma=33554432, mb=16777216] [L231] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L19] COND TRUE ! m [L20] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L70] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L231] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=127, eb=0, ma=33554432, mb=16777216] [L231] zero = base2flt(0, 0) [L232] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=33554432] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L19] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L25] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L47] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L49] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L54] COND TRUE e >= 127 [L55] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, e=127, m=33554432] [L70] return (__retres4); VAL [\old(e)=127, \old(m)=33554432, \result=4294967295, __retres4=4294967295, e=127, m=33554432] [L232] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=4294967295, ea=127, eb=0, ma=33554432, mb=16777216, zero=0] [L232] a = base2flt(ma, ea) [L233] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=0, \old(m)=16777216] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L19] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L25] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L47] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L49] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L66] m = m & ~ (1U << 24U) [L67] res = m | ((unsigned int )(e + 128) << 24U) [L68] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=1, e=0, res=1] [L70] return (__retres4); VAL [\old(e)=0, \old(m)=16777216, \result=4294967297, __retres4=1, e=0, res=1] [L233] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=4294967297, ea=127, eb=0, ma=33554432, mb=16777216, zero=0] [L233] b = base2flt(mb, eb) [L234] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=1] [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 ; VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1] [L84] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1] [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) VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1, ea=127, eb=128] [L104] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.3s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 671 SDtfs, 266 SDslu, 4716 SDs, 0 SdLazy, 704 SolverSat, 49 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 345 GetRequests, 236 SyntacticMatches, 10 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.9s 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, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 392 NumberOfCodeBlocks, 392 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 341 ConstructedInterpolants, 0 QuantifiedInterpolants, 38963 SizeOfPredicates, 4 NumberOfNonLiveVariables, 112 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 131/149 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...