/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invariants/eq1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:50:21,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:50:21,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:50:21,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 19:50:21,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:50:21,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:50:21,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:50:21,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:50:21,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:50:21,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:50:21,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:50:21,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:50:21,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:50:21,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:50:21,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:50:21,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:50:21,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:50:21,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:50:21,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:50:21,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:50:21,776 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 19:50:21,790 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:50:21,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:50:21,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:50:21,793 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:50:21,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:50:21,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:50:21,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:50:21,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:50:21,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:50:21,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:50:21,796 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:50:21,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:50:21,796 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:50:21,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:50:21,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:50:21,797 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:50:21,797 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:50:21,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:50:21,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:50:21,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:50:21,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:50:21,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:50:21,799 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:50:22,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:50:22,113 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:50:22,120 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:50:22,122 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:50:22,122 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:50:22,123 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/eq1.c [2020-08-22 19:50:22,197 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e40b48a7/bffe8791055d473b900f0deacace0841/FLAGe1b1c1e26 [2020-08-22 19:50:22,594 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:50:22,595 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq1.c [2020-08-22 19:50:22,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e40b48a7/bffe8791055d473b900f0deacace0841/FLAGe1b1c1e26 [2020-08-22 19:50:22,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e40b48a7/bffe8791055d473b900f0deacace0841 [2020-08-22 19:50:22,984 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:50:22,986 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:50:22,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:50:22,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:50:22,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:50:22,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:50:22" (1/1) ... [2020-08-22 19:50:22,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e1c28a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:22, skipping insertion in model container [2020-08-22 19:50:22,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:50:22" (1/1) ... [2020-08-22 19:50:23,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:50:23,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:50:23,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:50:23,231 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:50:23,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:50:23,268 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:50:23,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:23 WrapperNode [2020-08-22 19:50:23,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:50:23,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:50:23,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:50:23,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:50:23,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:23" (1/1) ... [2020-08-22 19:50:23,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:23" (1/1) ... [2020-08-22 19:50:23,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:23" (1/1) ... [2020-08-22 19:50:23,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:23" (1/1) ... [2020-08-22 19:50:23,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:23" (1/1) ... [2020-08-22 19:50:23,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:23" (1/1) ... [2020-08-22 19:50:23,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:23" (1/1) ... [2020-08-22 19:50:23,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:50:23,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:50:23,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:50:23,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:50:23,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:23" (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 19:50:23,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:50:23,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:50:23,461 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:50:23,461 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:50:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:50:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 19:50:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:50:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:50:23,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:50:23,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:50:23,705 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:50:23,705 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:50:23,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:50:23 BoogieIcfgContainer [2020-08-22 19:50:23,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:50:23,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:50:23,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:50:23,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:50:23,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:50:22" (1/3) ... [2020-08-22 19:50:23,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a840694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:50:23, skipping insertion in model container [2020-08-22 19:50:23,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:23" (2/3) ... [2020-08-22 19:50:23,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a840694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:50:23, skipping insertion in model container [2020-08-22 19:50:23,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:50:23" (3/3) ... [2020-08-22 19:50:23,743 INFO L109 eAbstractionObserver]: Analyzing ICFG eq1.c [2020-08-22 19:50:23,770 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:50:23,784 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:50:23,799 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:50:23,825 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:50:23,825 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:50:23,825 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:50:23,825 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:50:23,826 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:50:23,826 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:50:23,826 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:50:23,826 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:50:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-08-22 19:50:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 19:50:23,851 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:23,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:23,853 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:23,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:23,860 INFO L82 PathProgramCache]: Analyzing trace with hash 635191250, now seen corresponding path program 1 times [2020-08-22 19:50:23,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:23,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257637000] [2020-08-22 19:50:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:23,922 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:23,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:23,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257637000] [2020-08-22 19:50:23,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:23,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 19:50:23,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247651785] [2020-08-22 19:50:23,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 19:50:23,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:24,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 19:50:24,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:50:24,006 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-08-22 19:50:24,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:24,034 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-08-22 19:50:24,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 19:50:24,036 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-08-22 19:50:24,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:24,045 INFO L225 Difference]: With dead ends: 52 [2020-08-22 19:50:24,046 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 19:50:24,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:50:24,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 19:50:24,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 19:50:24,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 19:50:24,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 19:50:24,090 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 15 [2020-08-22 19:50:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:24,091 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 19:50:24,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 19:50:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 19:50:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 19:50:24,092 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:24,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:24,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:50:24,093 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:24,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:24,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1725587167, now seen corresponding path program 1 times [2020-08-22 19:50:24,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:24,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21832810] [2020-08-22 19:50:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:24,097 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:24,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:24,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21832810] [2020-08-22 19:50:24,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:24,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:50:24,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968662885] [2020-08-22 19:50:24,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:50:24,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:24,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:50:24,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:50:24,322 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 6 states. [2020-08-22 19:50:24,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:24,441 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-08-22 19:50:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 19:50:24,442 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-08-22 19:50:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:24,445 INFO L225 Difference]: With dead ends: 63 [2020-08-22 19:50:24,445 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 19:50:24,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:50:24,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 19:50:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2020-08-22 19:50:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 19:50:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-08-22 19:50:24,459 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 16 [2020-08-22 19:50:24,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:24,459 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-08-22 19:50:24,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:50:24,460 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-08-22 19:50:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 19:50:24,461 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:24,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 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 19:50:24,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:50:24,461 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:24,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:24,462 INFO L82 PathProgramCache]: Analyzing trace with hash -82059580, now seen corresponding path program 1 times [2020-08-22 19:50:24,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:24,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937807330] [2020-08-22 19:50:24,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:24,493 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:24,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:24,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937807330] [2020-08-22 19:50:24,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:24,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:50:24,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454581022] [2020-08-22 19:50:24,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:50:24,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:24,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:50:24,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:50:24,835 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 8 states. [2020-08-22 19:50:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:24,922 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-08-22 19:50:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:50:24,923 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-08-22 19:50:24,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:24,925 INFO L225 Difference]: With dead ends: 53 [2020-08-22 19:50:24,925 INFO L226 Difference]: Without dead ends: 47 [2020-08-22 19:50:24,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:50:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-22 19:50:24,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-08-22 19:50:24,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 19:50:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-08-22 19:50:24,937 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 26 [2020-08-22 19:50:24,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:24,938 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-08-22 19:50:24,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:50:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-08-22 19:50:24,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 19:50:24,939 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:24,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 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 19:50:24,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:50:24,940 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:24,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:24,941 INFO L82 PathProgramCache]: Analyzing trace with hash -697570748, now seen corresponding path program 1 times [2020-08-22 19:50:24,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:24,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972892315] [2020-08-22 19:50:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:24,948 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:25,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:25,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972892315] [2020-08-22 19:50:25,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:25,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:50:25,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598388725] [2020-08-22 19:50:25,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:50:25,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:25,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:50:25,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:50:25,245 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 8 states. [2020-08-22 19:50:25,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:25,374 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2020-08-22 19:50:25,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:50:25,375 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-08-22 19:50:25,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:25,377 INFO L225 Difference]: With dead ends: 83 [2020-08-22 19:50:25,378 INFO L226 Difference]: Without dead ends: 77 [2020-08-22 19:50:25,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:50:25,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-22 19:50:25,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 56. [2020-08-22 19:50:25,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-22 19:50:25,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-08-22 19:50:25,407 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 26 [2020-08-22 19:50:25,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:25,408 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-08-22 19:50:25,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:50:25,408 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-08-22 19:50:25,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 19:50:25,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:25,412 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-22 19:50:25,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:50:25,412 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:25,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:25,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1924042729, now seen corresponding path program 1 times [2020-08-22 19:50:25,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:25,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824098156] [2020-08-22 19:50:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:25,424 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:25,930 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 30 [2020-08-22 19:50:25,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:25,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824098156] [2020-08-22 19:50:25,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:25,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:50:25,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008969539] [2020-08-22 19:50:25,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:50:25,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:25,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:50:25,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:50:25,966 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 10 states. [2020-08-22 19:50:26,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:26,102 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2020-08-22 19:50:26,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 19:50:26,103 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-08-22 19:50:26,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:26,105 INFO L225 Difference]: With dead ends: 96 [2020-08-22 19:50:26,105 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 19:50:26,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:50:26,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 19:50:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 53. [2020-08-22 19:50:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 19:50:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-08-22 19:50:26,117 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 36 [2020-08-22 19:50:26,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:26,118 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-08-22 19:50:26,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:50:26,118 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-08-22 19:50:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 19:50:26,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:26,119 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-22 19:50:26,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:50:26,120 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:26,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:26,120 INFO L82 PathProgramCache]: Analyzing trace with hash -726257687, now seen corresponding path program 2 times [2020-08-22 19:50:26,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:26,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109278517] [2020-08-22 19:50:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:26,126 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:26,527 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 30 [2020-08-22 19:50:26,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:26,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109278517] [2020-08-22 19:50:26,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:26,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:50:26,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981673595] [2020-08-22 19:50:26,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:50:26,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:26,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:50:26,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:50:26,561 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 10 states. [2020-08-22 19:50:26,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:26,665 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-08-22 19:50:26,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 19:50:26,666 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-08-22 19:50:26,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:26,667 INFO L225 Difference]: With dead ends: 53 [2020-08-22 19:50:26,667 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 19:50:26,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:50:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 19:50:26,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 19:50:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 19:50:26,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 19:50:26,669 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-08-22 19:50:26,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:26,669 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 19:50:26,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:50:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 19:50:26,670 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 19:50:26,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:50:26,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 19:50:26,945 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:50:26,945 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:50:26,946 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:50:26,946 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 19:50:26,946 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 19:50:26,946 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:50:26,946 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 9 23) the Hoare annotation is: true [2020-08-22 19:50:26,946 INFO L271 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: true [2020-08-22 19:50:26,947 INFO L264 CegarLoopResult]: At program point L15(lines 15 19) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-08-22 19:50:26,948 INFO L264 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-08-22 19:50:26,948 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (= main_~w~0 main_~x~0) [2020-08-22 19:50:26,948 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 9 23) the Hoare annotation is: true [2020-08-22 19:50:26,948 INFO L264 CegarLoopResult]: At program point L15-3(line 15) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-08-22 19:50:26,949 INFO L271 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: true [2020-08-22 19:50:26,949 INFO L264 CegarLoopResult]: At program point L15-4(lines 14 20) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-08-22 19:50:26,949 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 23) the Hoare annotation is: true [2020-08-22 19:50:26,949 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-08-22 19:50:26,950 INFO L264 CegarLoopResult]: At program point L18-1(line 18) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-08-22 19:50:26,950 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-08-22 19:50:26,951 INFO L264 CegarLoopResult]: At program point L18-2(line 18) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 1))) (and (= main_~x~0 main_~w~0) (<= .cse0 main_~z~0) (<= main_~z~0 .cse0))) [2020-08-22 19:50:26,951 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-08-22 19:50:26,951 INFO L264 CegarLoopResult]: At program point L18-3(line 18) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 1))) (and (= main_~x~0 main_~w~0) (<= .cse0 main_~z~0) (<= main_~z~0 .cse0))) [2020-08-22 19:50:26,951 INFO L264 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 1))) (and (<= main_~w~0 .cse0) (<= .cse0 main_~w~0) (= main_~z~0 main_~y~0))) [2020-08-22 19:50:26,952 INFO L264 CegarLoopResult]: At program point L18-4(line 18) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 1))) (and (= main_~x~0 main_~w~0) (<= .cse0 main_~z~0) (<= main_~z~0 .cse0))) [2020-08-22 19:50:26,952 INFO L264 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: (let ((.cse3 (div main_~z~0 4294967296)) (.cse2 (div main_~y~0 4294967296))) (let ((.cse1 (+ main_~z~0 (* 4294967296 .cse2))) (.cse0 (* 4294967296 .cse3))) (and (<= (+ main_~y~0 .cse0) .cse1) (< .cse1 (+ main_~y~0 .cse0 1)) (= main_~x~0 main_~w~0) (< .cse2 (+ .cse3 1))))) [2020-08-22 19:50:26,952 INFO L264 CegarLoopResult]: At program point L16-3(line 16) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 1))) (and (<= main_~w~0 .cse0) (<= .cse0 main_~w~0) (= main_~z~0 main_~y~0))) [2020-08-22 19:50:26,953 INFO L264 CegarLoopResult]: At program point L18-5(line 18) the Hoare annotation is: (and (= main_~w~0 main_~x~0) (= main_~y~0 main_~z~0)) [2020-08-22 19:50:26,953 INFO L264 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: (= main_~w~0 main_~x~0) [2020-08-22 19:50:26,953 INFO L264 CegarLoopResult]: At program point L16-4(line 16) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 1))) (and (<= main_~w~0 .cse0) (<= .cse0 main_~w~0) (= main_~z~0 main_~y~0))) [2020-08-22 19:50:26,953 INFO L264 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: (= main_~w~0 main_~x~0) [2020-08-22 19:50:26,953 INFO L264 CegarLoopResult]: At program point L14-3(line 14) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-08-22 19:50:26,953 INFO L264 CegarLoopResult]: At program point L16-5(line 16) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-08-22 19:50:26,954 INFO L271 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: true [2020-08-22 19:50:26,954 INFO L264 CegarLoopResult]: At program point L14-4(lines 14 20) the Hoare annotation is: (let ((.cse3 (div main_~z~0 4294967296)) (.cse2 (div main_~y~0 4294967296))) (let ((.cse1 (+ main_~z~0 (* 4294967296 .cse2))) (.cse0 (* 4294967296 .cse3))) (and (<= (+ main_~y~0 .cse0) .cse1) (< .cse1 (+ main_~y~0 .cse0 1)) (= main_~x~0 main_~w~0) (< .cse2 (+ .cse3 1))))) [2020-08-22 19:50:26,954 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-22 19:50:26,954 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 3 8) the Hoare annotation is: true [2020-08-22 19:50:26,954 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:50:26,954 INFO L264 CegarLoopResult]: At program point L4(lines 4 6) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 19:50:26,955 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:50:26,955 INFO L271 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2020-08-22 19:50:26,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:50:26 BoogieIcfgContainer [2020-08-22 19:50:26,982 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:50:26,986 INFO L168 Benchmark]: Toolchain (without parser) took 3998.71 ms. Allocated memory was 144.7 MB in the beginning and 246.9 MB in the end (delta: 102.2 MB). Free memory was 101.9 MB in the beginning and 148.8 MB in the end (delta: -46.9 MB). Peak memory consumption was 55.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:26,987 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 144.7 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-22 19:50:26,993 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.46 ms. Allocated memory is still 144.7 MB. Free memory was 101.7 MB in the beginning and 92.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:26,995 INFO L168 Benchmark]: Boogie Preprocessor took 35.03 ms. Allocated memory is still 144.7 MB. Free memory was 92.3 MB in the beginning and 90.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:26,996 INFO L168 Benchmark]: RCFGBuilder took 405.92 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 90.8 MB in the beginning and 167.5 MB in the end (delta: -76.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:26,997 INFO L168 Benchmark]: TraceAbstraction took 3255.50 ms. Allocated memory was 201.9 MB in the beginning and 246.9 MB in the end (delta: 45.1 MB). Free memory was 167.5 MB in the beginning and 148.8 MB in the end (delta: 18.7 MB). Peak memory consumption was 63.8 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:27,012 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 144.7 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 282.46 ms. Allocated memory is still 144.7 MB. Free memory was 101.7 MB in the beginning and 92.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.03 ms. Allocated memory is still 144.7 MB. Free memory was 92.3 MB in the beginning and 90.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 405.92 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 90.8 MB in the beginning and 167.5 MB in the end (delta: -76.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3255.50 ms. Allocated memory was 201.9 MB in the beginning and 246.9 MB in the end (delta: 45.1 MB). Free memory was 167.5 MB in the beginning and 148.8 MB in the end (delta: 18.7 MB). Peak memory consumption was 63.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: x == w && z == y - ProcedureContractResult [Line: 9]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 3]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.8s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 172 SDtfs, 180 SDslu, 576 SDs, 0 SdLazy, 294 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 85 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 40 LocationsWithAnnotation, 70 PreInvPairs, 109 NumberOfFragments, 287 HoareAnnotationTreeSize, 70 FomulaSimplifications, 1378 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 40 FomulaSimplificationsInter, 35 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...