/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 21:51:01,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 21:51:01,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 21:51:01,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 21:51:01,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 21:51:01,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 21:51:01,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 21:51:01,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 21:51:01,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 21:51:01,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 21:51:01,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 21:51:01,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 21:51:01,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 21:51:01,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 21:51:01,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 21:51:01,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 21:51:01,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 21:51:01,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 21:51:01,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 21:51:01,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 21:51:01,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 21:51:01,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 21:51:01,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 21:51:01,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 21:51:01,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 21:51:01,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 21:51:01,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 21:51:01,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 21:51:01,509 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 21:51:01,524 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 21:51:01,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 21:51:01,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 21:51:01,527 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 21:51:01,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 21:51:01,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 21:51:01,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 21:51:01,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 21:51:01,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 21:51:01,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 21:51:01,528 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 21:51:01,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 21:51:01,529 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 21:51:01,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 21:51:01,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 21:51:01,530 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 21:51:01,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 21:51:01,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 21:51:01,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 21:51:01,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 21:51:01,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 21:51:01,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 21:51:01,535 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-08-22 21:51:01,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 21:51:01,796 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 21:51:01,803 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 21:51:01,804 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 21:51:01,805 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 21:51:01,805 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-08-22 21:51:01,886 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82c9cedb0/ca5d137696ad4f4f8a73ce8ca7cbbbf6/FLAG40226d8b6 [2020-08-22 21:51:02,383 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 21:51:02,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-08-22 21:51:02,394 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82c9cedb0/ca5d137696ad4f4f8a73ce8ca7cbbbf6/FLAG40226d8b6 [2020-08-22 21:51:02,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82c9cedb0/ca5d137696ad4f4f8a73ce8ca7cbbbf6 [2020-08-22 21:51:02,702 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 21:51:02,704 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 21:51:02,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 21:51:02,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 21:51:02,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 21:51:02,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:51:02" (1/1) ... [2020-08-22 21:51:02,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7061e264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:02, skipping insertion in model container [2020-08-22 21:51:02,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:51:02" (1/1) ... [2020-08-22 21:51:02,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 21:51:02,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 21:51:03,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:51:03,050 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 21:51:03,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:51:03,192 INFO L208 MainTranslator]: Completed translation [2020-08-22 21:51:03,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03 WrapperNode [2020-08-22 21:51:03,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 21:51:03,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 21:51:03,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 21:51:03,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 21:51:03,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (1/1) ... [2020-08-22 21:51:03,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (1/1) ... [2020-08-22 21:51:03,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (1/1) ... [2020-08-22 21:51:03,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (1/1) ... [2020-08-22 21:51:03,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (1/1) ... [2020-08-22 21:51:03,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (1/1) ... [2020-08-22 21:51:03,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (1/1) ... [2020-08-22 21:51:03,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 21:51:03,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 21:51:03,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 21:51:03,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 21:51:03,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (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 21:51:03,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 21:51:03,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 21:51:03,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 21:51:03,310 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-22 21:51:03,310 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-22 21:51:03,310 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-22 21:51:03,311 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 21:51:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 21:51:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 21:51:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 21:51:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 21:51:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-22 21:51:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-22 21:51:03,312 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-22 21:51:03,312 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 21:51:03,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 21:51:03,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 21:51:03,802 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 21:51:03,802 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 21:51:03,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:51:03 BoogieIcfgContainer [2020-08-22 21:51:03,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 21:51:03,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 21:51:03,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 21:51:03,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 21:51:03,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 09:51:02" (1/3) ... [2020-08-22 21:51:03,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111fff94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:51:03, skipping insertion in model container [2020-08-22 21:51:03,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (2/3) ... [2020-08-22 21:51:03,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111fff94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:51:03, skipping insertion in model container [2020-08-22 21:51:03,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:51:03" (3/3) ... [2020-08-22 21:51:03,817 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2020-08-22 21:51:03,829 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 21:51:03,836 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 21:51:03,851 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 21:51:03,875 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 21:51:03,875 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 21:51:03,875 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 21:51:03,875 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 21:51:03,876 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 21:51:03,876 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 21:51:03,876 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 21:51:03,876 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 21:51:03,896 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states. [2020-08-22 21:51:03,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 21:51:03,911 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:03,913 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:03,913 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:03,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:03,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1377121462, now seen corresponding path program 1 times [2020-08-22 21:51:03,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:03,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265197844] [2020-08-22 21:51:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 21:51:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 21:51:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 21:51:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 21:51:04,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265197844] [2020-08-22 21:51:04,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:51:04,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 21:51:04,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158805729] [2020-08-22 21:51:04,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 21:51:04,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:04,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 21:51:04,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 21:51:04,462 INFO L87 Difference]: Start difference. First operand 130 states. Second operand 8 states. [2020-08-22 21:51:04,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:04,762 INFO L93 Difference]: Finished difference Result 259 states and 324 transitions. [2020-08-22 21:51:04,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 21:51:04,764 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 81 [2020-08-22 21:51:04,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:04,781 INFO L225 Difference]: With dead ends: 259 [2020-08-22 21:51:04,782 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 21:51:04,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 21:51:04,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 21:51:04,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 138. [2020-08-22 21:51:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-22 21:51:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 158 transitions. [2020-08-22 21:51:04,850 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 158 transitions. Word has length 81 [2020-08-22 21:51:04,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:04,851 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 158 transitions. [2020-08-22 21:51:04,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 21:51:04,851 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 158 transitions. [2020-08-22 21:51:04,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 21:51:04,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:04,857 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:51:04,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 21:51:04,857 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:04,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:04,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1823732666, now seen corresponding path program 1 times [2020-08-22 21:51:04,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:04,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694781351] [2020-08-22 21:51:04,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 21:51:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 21:51:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 21:51:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 21:51:05,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694781351] [2020-08-22 21:51:05,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:05,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 21:51:05,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709630385] [2020-08-22 21:51:05,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 21:51:05,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:05,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 21:51:05,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-22 21:51:05,290 INFO L87 Difference]: Start difference. First operand 138 states and 158 transitions. Second operand 13 states. [2020-08-22 21:51:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:05,695 INFO L93 Difference]: Finished difference Result 277 states and 328 transitions. [2020-08-22 21:51:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 21:51:05,695 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2020-08-22 21:51:05,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:05,699 INFO L225 Difference]: With dead ends: 277 [2020-08-22 21:51:05,700 INFO L226 Difference]: Without dead ends: 218 [2020-08-22 21:51:05,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-08-22 21:51:05,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-08-22 21:51:05,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 188. [2020-08-22 21:51:05,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-22 21:51:05,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 220 transitions. [2020-08-22 21:51:05,737 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 220 transitions. Word has length 85 [2020-08-22 21:51:05,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:05,738 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 220 transitions. [2020-08-22 21:51:05,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 21:51:05,738 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 220 transitions. [2020-08-22 21:51:05,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 21:51:05,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:05,743 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:51:05,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 21:51:05,743 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:05,744 INFO L82 PathProgramCache]: Analyzing trace with hash -955036012, now seen corresponding path program 1 times [2020-08-22 21:51:05,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:05,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477552405] [2020-08-22 21:51:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 21:51:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 21:51:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 21:51:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 21:51:06,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477552405] [2020-08-22 21:51:06,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:06,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 21:51:06,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750543489] [2020-08-22 21:51:06,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 21:51:06,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:06,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 21:51:06,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 21:51:06,032 INFO L87 Difference]: Start difference. First operand 188 states and 220 transitions. Second operand 9 states. [2020-08-22 21:51:06,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:06,244 INFO L93 Difference]: Finished difference Result 336 states and 392 transitions. [2020-08-22 21:51:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 21:51:06,245 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 86 [2020-08-22 21:51:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:06,249 INFO L225 Difference]: With dead ends: 336 [2020-08-22 21:51:06,249 INFO L226 Difference]: Without dead ends: 277 [2020-08-22 21:51:06,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-22 21:51:06,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-22 21:51:06,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 233. [2020-08-22 21:51:06,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-08-22 21:51:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 273 transitions. [2020-08-22 21:51:06,287 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 273 transitions. Word has length 86 [2020-08-22 21:51:06,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:06,288 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 273 transitions. [2020-08-22 21:51:06,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 21:51:06,288 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 273 transitions. [2020-08-22 21:51:06,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-22 21:51:06,291 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:06,292 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:51:06,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 21:51:06,292 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:06,293 INFO L82 PathProgramCache]: Analyzing trace with hash 808883757, now seen corresponding path program 1 times [2020-08-22 21:51:06,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:06,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407357202] [2020-08-22 21:51:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 21:51:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 21:51:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 21:51:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 21:51:06,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407357202] [2020-08-22 21:51:06,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:06,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 21:51:06,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736521952] [2020-08-22 21:51:06,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 21:51:06,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:06,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 21:51:06,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 21:51:06,501 INFO L87 Difference]: Start difference. First operand 233 states and 273 transitions. Second operand 10 states. [2020-08-22 21:51:06,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:06,732 INFO L93 Difference]: Finished difference Result 333 states and 385 transitions. [2020-08-22 21:51:06,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 21:51:06,733 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 88 [2020-08-22 21:51:06,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:06,735 INFO L225 Difference]: With dead ends: 333 [2020-08-22 21:51:06,736 INFO L226 Difference]: Without dead ends: 224 [2020-08-22 21:51:06,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-08-22 21:51:06,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-08-22 21:51:06,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 188. [2020-08-22 21:51:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-22 21:51:06,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 214 transitions. [2020-08-22 21:51:06,760 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 214 transitions. Word has length 88 [2020-08-22 21:51:06,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:06,760 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 214 transitions. [2020-08-22 21:51:06,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 21:51:06,760 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 214 transitions. [2020-08-22 21:51:06,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 21:51:06,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:06,763 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:51:06,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 21:51:06,763 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:06,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1795206334, now seen corresponding path program 2 times [2020-08-22 21:51:06,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:06,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391617526] [2020-08-22 21:51:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 21:51:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 21:51:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-22 21:51:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-08-22 21:51:07,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391617526] [2020-08-22 21:51:07,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:51:07,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 21:51:07,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888256088] [2020-08-22 21:51:07,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 21:51:07,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:07,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 21:51:07,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-08-22 21:51:07,271 INFO L87 Difference]: Start difference. First operand 188 states and 214 transitions. Second operand 15 states. [2020-08-22 21:51:07,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:07,970 INFO L93 Difference]: Finished difference Result 328 states and 385 transitions. [2020-08-22 21:51:07,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 21:51:07,971 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 89 [2020-08-22 21:51:07,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:07,976 INFO L225 Difference]: With dead ends: 328 [2020-08-22 21:51:07,976 INFO L226 Difference]: Without dead ends: 269 [2020-08-22 21:51:07,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2020-08-22 21:51:07,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-08-22 21:51:08,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 239. [2020-08-22 21:51:08,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-08-22 21:51:08,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 275 transitions. [2020-08-22 21:51:08,013 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 275 transitions. Word has length 89 [2020-08-22 21:51:08,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:08,014 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 275 transitions. [2020-08-22 21:51:08,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 21:51:08,014 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 275 transitions. [2020-08-22 21:51:08,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-22 21:51:08,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:08,018 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:51:08,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 21:51:08,019 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:08,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:08,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1839352304, now seen corresponding path program 1 times [2020-08-22 21:51:08,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:08,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550171849] [2020-08-22 21:51:08,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 21:51:08,053 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 21:51:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 21:51:08,079 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 21:51:08,111 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 21:51:08,111 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 21:51:08,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 21:51:08,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 09:51:08 BoogieIcfgContainer [2020-08-22 21:51:08,193 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 21:51:08,195 INFO L168 Benchmark]: Toolchain (without parser) took 5490.98 ms. Allocated memory was 141.0 MB in the beginning and 272.6 MB in the end (delta: 131.6 MB). Free memory was 104.7 MB in the beginning and 168.2 MB in the end (delta: -63.6 MB). Peak memory consumption was 68.0 MB. Max. memory is 7.1 GB. [2020-08-22 21:51:08,196 INFO L168 Benchmark]: CDTParser took 0.83 ms. Allocated memory is still 141.0 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 21:51:08,197 INFO L168 Benchmark]: CACSL2BoogieTranslator took 488.96 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 104.5 MB in the beginning and 183.9 MB in the end (delta: -79.4 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-08-22 21:51:08,198 INFO L168 Benchmark]: Boogie Preprocessor took 40.42 ms. Allocated memory is still 205.0 MB. Free memory was 183.2 MB in the beginning and 180.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-22 21:51:08,199 INFO L168 Benchmark]: RCFGBuilder took 573.38 ms. Allocated memory is still 205.0 MB. Free memory was 180.9 MB in the beginning and 149.4 MB in the end (delta: 31.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 7.1 GB. [2020-08-22 21:51:08,200 INFO L168 Benchmark]: TraceAbstraction took 4383.00 ms. Allocated memory was 205.0 MB in the beginning and 272.6 MB in the end (delta: 67.6 MB). Free memory was 149.4 MB in the beginning and 168.2 MB in the end (delta: -18.9 MB). Peak memory consumption was 48.7 MB. Max. memory is 7.1 GB. [2020-08-22 21:51:08,203 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.83 ms. Allocated memory is still 141.0 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 488.96 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 104.5 MB in the beginning and 183.9 MB in the end (delta: -79.4 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 40.42 ms. Allocated memory is still 205.0 MB. Free memory was 183.2 MB in the beginning and 180.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 573.38 ms. Allocated memory is still 205.0 MB. Free memory was 180.9 MB in the beginning and 149.4 MB in the end (delta: 31.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4383.00 ms. Allocated memory was 205.0 MB in the beginning and 272.6 MB in the end (delta: 67.6 MB). Free memory was 149.4 MB in the beginning and 168.2 MB in the end (delta: -18.9 MB). Peak memory consumption was 48.7 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 103, overapproximation of bitwiseAnd at line 101. Possible FailurePath: [L216] unsigned int a ; [L217] unsigned int ma = __VERIFIER_nondet_uint(); VAL [__VERIFIER_nondet_uint()=33554432, ma=33554432] [L218] signed char ea = __VERIFIER_nondet_char(); VAL [__VERIFIER_nondet_char()=127, ea=127, ma=33554432] [L219] unsigned int b ; VAL [ea=127, ma=33554432] [L220] unsigned int mb = __VERIFIER_nondet_uint(); VAL [__VERIFIER_nondet_uint()=16777216, ea=127, ma=33554432, mb=16777216] [L221] signed char eb = __VERIFIER_nondet_char(); VAL [__VERIFIER_nondet_char()=0, ea=127, eb=0, ma=33554432, mb=16777216] [L222] unsigned int r_add1 ; VAL [ea=127, eb=0, ma=33554432, mb=16777216] [L223] unsigned int r_add2 ; VAL [ea=127, eb=0, ma=33554432, mb=16777216] [L224] unsigned int zero ; VAL [ea=127, eb=0, ma=33554432, mb=16777216] [L225] int tmp ; VAL [ea=127, eb=0, ma=33554432, mb=16777216] [L226] int tmp___0 ; VAL [ea=127, eb=0, ma=33554432, mb=16777216] [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 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L16] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L19] COND TRUE ! m VAL [\old(e)=0, \old(m)=0, e=0, m=0] [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) VAL [base2flt(0, 0)=0, ea=127, eb=0, ma=33554432, mb=16777216, zero=0] [L232] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=33554432] [L15] unsigned int res ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [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 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [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) VAL [a=4294967295, base2flt(ma, ea)=4294967295, ea=127, eb=0, ma=33554432, mb=16777216, zero=0] [L233] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=0, \old(m)=16777216] [L15] unsigned int res ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [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) VAL [\old(e)=0, \old(m)=16777216, e=0] [L67] res = m | ((unsigned int )(e + 128) << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0] [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) VAL [a=4294967295, b=1, base2flt(mb, eb)=4294967297, ea=127, eb=0, ma=33554432, mb=16777216, zero=0] [L234] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=1] [L74] unsigned int res ; VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1] [L75] unsigned int ma ; VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1] [L76] unsigned int mb ; VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1] [L77] unsigned int delta ; VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1] [L78] int ea ; VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1] [L79] int eb ; VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1] [L80] unsigned int tmp ; VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1] [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) VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1] [L98] ma = a & ((1U << 24U) - 1U) VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1] [L99] ea = (int )(a >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1, ea=127] [L100] ma = ma | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1, ea=127] [L101] mb = b & ((1U << 24U) - 1U) VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1, ea=127] [L102] eb = (int )(b >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1, ea=127, eb=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, 169 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.2s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 828 SDtfs, 418 SDslu, 6912 SDs, 0 SdLazy, 731 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=239occurred in iteration=5, 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, 5 MinimizatonAttempts, 152 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 519 NumberOfCodeBlocks, 519 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 424 ConstructedInterpolants, 0 QuantifiedInterpolants, 141004 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 122/131 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...