/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:16:52,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:16:52,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:16:52,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 01:16:52,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:16:52,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:16:52,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:16:52,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:16:52,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:16:52,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:16:52,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:16:52,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:16:52,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:16:52,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:16:52,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:16:52,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:16:52,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:16:52,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:16:52,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:16:52,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:16:52,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:16:52,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:16:52,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:16:52,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:16:52,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 01:16:52,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:16:52,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:16:52,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:16:52,645 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 01:16:52,668 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:16:52,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:16:52,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:16:52,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:16:52,670 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:16:52,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:16:52,670 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:16:52,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:16:52,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:16:52,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:16:52,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:16:52,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:16:52,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:16:52,671 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:16:52,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:16:52,672 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:16:52,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:16:52,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:16:52,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:16:52,673 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:16:52,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:16:52,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:16:52,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:16:52,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:16:52,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:16:52,674 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:16:52,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:16:52,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:16:52,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:16:52,674 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; [2020-08-19 01:16:52,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:16:52,972 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:16:52,975 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:16:52,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:16:52,977 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:16:52,978 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-08-19 01:16:53,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb06cb3b5/0dc163a4ca204d25af3743351e9af884/FLAG86d0eb136 [2020-08-19 01:16:53,539 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:16:53,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-08-19 01:16:53,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb06cb3b5/0dc163a4ca204d25af3743351e9af884/FLAG86d0eb136 [2020-08-19 01:16:53,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb06cb3b5/0dc163a4ca204d25af3743351e9af884 [2020-08-19 01:16:53,941 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:16:53,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:16:53,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:16:53,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:16:53,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:16:53,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:16:53" (1/1) ... [2020-08-19 01:16:53,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75024412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:53, skipping insertion in model container [2020-08-19 01:16:53,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:16:53" (1/1) ... [2020-08-19 01:16:53,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:16:53,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:16:54,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:16:54,176 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:16:54,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:16:54,211 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:16:54,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:54 WrapperNode [2020-08-19 01:16:54,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:16:54,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:16:54,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:16:54,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:16:54,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:54" (1/1) ... [2020-08-19 01:16:54,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:54" (1/1) ... [2020-08-19 01:16:54,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:54" (1/1) ... [2020-08-19 01:16:54,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:54" (1/1) ... [2020-08-19 01:16:54,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:54" (1/1) ... [2020-08-19 01:16:54,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:54" (1/1) ... [2020-08-19 01:16:54,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:54" (1/1) ... [2020-08-19 01:16:54,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:16:54,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:16:54,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:16:54,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:16:54,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:16:54,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:16:54,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:16:54,387 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 01:16:54,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 01:16:54,387 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:16:54,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:16:54,387 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 01:16:54,388 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 01:16:54,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 01:16:54,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 01:16:54,388 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:16:54,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:16:54,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:16:54,706 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:16:54,707 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-19 01:16:54,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:16:54 BoogieIcfgContainer [2020-08-19 01:16:54,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:16:54,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:16:54,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:16:54,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:16:54,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:16:53" (1/3) ... [2020-08-19 01:16:54,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33923fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:16:54, skipping insertion in model container [2020-08-19 01:16:54,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:54" (2/3) ... [2020-08-19 01:16:54,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33923fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:16:54, skipping insertion in model container [2020-08-19 01:16:54,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:16:54" (3/3) ... [2020-08-19 01:16:54,728 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2020-08-19 01:16:54,750 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:16:54,764 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:16:54,780 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:16:54,821 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:16:54,821 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:16:54,821 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:16:54,821 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:16:54,821 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:16:54,822 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:16:54,822 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:16:54,822 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:16:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-19 01:16:54,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-19 01:16:54,849 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:54,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:54,850 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:54,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:54,856 INFO L82 PathProgramCache]: Analyzing trace with hash -234903868, now seen corresponding path program 1 times [2020-08-19 01:16:54,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:54,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169722048] [2020-08-19 01:16:54,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:54,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:16:54,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169722048] [2020-08-19 01:16:54,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:16:54,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-19 01:16:54,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170517117] [2020-08-19 01:16:55,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-19 01:16:55,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:55,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-19 01:16:55,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-19 01:16:55,015 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2020-08-19 01:16:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:55,042 INFO L93 Difference]: Finished difference Result 87 states and 156 transitions. [2020-08-19 01:16:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-19 01:16:55,044 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-08-19 01:16:55,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:55,053 INFO L225 Difference]: With dead ends: 87 [2020-08-19 01:16:55,053 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 01:16:55,058 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 [2020-08-19 01:16:55,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 01:16:55,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-19 01:16:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 01:16:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-08-19 01:16:55,111 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 12 [2020-08-19 01:16:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:55,111 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-08-19 01:16:55,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-19 01:16:55,112 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2020-08-19 01:16:55,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 01:16:55,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:55,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:55,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:16:55,115 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:55,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:55,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1276958999, now seen corresponding path program 1 times [2020-08-19 01:16:55,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:55,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330391943] [2020-08-19 01:16:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:55,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:16:55,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330391943] [2020-08-19 01:16:55,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:16:55,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:16:55,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467006578] [2020-08-19 01:16:55,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:16:55,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:55,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:16:55,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:16:55,228 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 5 states. [2020-08-19 01:16:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:55,401 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2020-08-19 01:16:55,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 01:16:55,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 01:16:55,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:55,404 INFO L225 Difference]: With dead ends: 48 [2020-08-19 01:16:55,404 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 01:16:55,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:16:55,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 01:16:55,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-08-19 01:16:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 01:16:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-08-19 01:16:55,420 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 13 [2020-08-19 01:16:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:55,421 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-08-19 01:16:55,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:16:55,421 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-08-19 01:16:55,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 01:16:55,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:55,422 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:55,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:16:55,423 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:55,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:55,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1880963538, now seen corresponding path program 1 times [2020-08-19 01:16:55,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:55,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438724122] [2020-08-19 01:16:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:55,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:55,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 01:16:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:55,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:16:55,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438724122] [2020-08-19 01:16:55,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:16:55,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:16:55,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76216910] [2020-08-19 01:16:55,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:16:55,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:55,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:16:55,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:16:55,489 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 5 states. [2020-08-19 01:16:55,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:55,568 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2020-08-19 01:16:55,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 01:16:55,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-19 01:16:55,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:55,570 INFO L225 Difference]: With dead ends: 52 [2020-08-19 01:16:55,571 INFO L226 Difference]: Without dead ends: 40 [2020-08-19 01:16:55,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:16:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-19 01:16:55,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-08-19 01:16:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-19 01:16:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-08-19 01:16:55,581 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 18 [2020-08-19 01:16:55,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:55,582 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-08-19 01:16:55,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:16:55,582 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-08-19 01:16:55,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 01:16:55,583 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:55,583 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:55,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 01:16:55,584 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:55,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:55,584 INFO L82 PathProgramCache]: Analyzing trace with hash 996212544, now seen corresponding path program 1 times [2020-08-19 01:16:55,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:55,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895770105] [2020-08-19 01:16:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:55,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:55,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 01:16:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:16:55,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895770105] [2020-08-19 01:16:55,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:16:55,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 01:16:55,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522534520] [2020-08-19 01:16:55,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 01:16:55,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:55,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 01:16:55,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:16:55,668 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 6 states. [2020-08-19 01:16:55,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:55,804 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2020-08-19 01:16:55,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 01:16:55,804 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-19 01:16:55,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:55,806 INFO L225 Difference]: With dead ends: 55 [2020-08-19 01:16:55,806 INFO L226 Difference]: Without dead ends: 53 [2020-08-19 01:16:55,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-19 01:16:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-19 01:16:55,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-08-19 01:16:55,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-19 01:16:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2020-08-19 01:16:55,818 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 19 [2020-08-19 01:16:55,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:55,818 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2020-08-19 01:16:55,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 01:16:55,819 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2020-08-19 01:16:55,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-19 01:16:55,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:55,821 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:55,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 01:16:55,821 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:55,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:55,822 INFO L82 PathProgramCache]: Analyzing trace with hash -381964826, now seen corresponding path program 1 times [2020-08-19 01:16:55,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:55,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108785591] [2020-08-19 01:16:55,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:55,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:55,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 01:16:55,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:55,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 01:16:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:55,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 01:16:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-19 01:16:55,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108785591] [2020-08-19 01:16:55,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:16:55,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 01:16:55,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334538969] [2020-08-19 01:16:55,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 01:16:55,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:55,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 01:16:55,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 01:16:55,986 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 7 states. [2020-08-19 01:16:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:56,111 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2020-08-19 01:16:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 01:16:56,111 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-19 01:16:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:56,112 INFO L225 Difference]: With dead ends: 51 [2020-08-19 01:16:56,112 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 01:16:56,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:16:56,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 01:16:56,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 01:16:56,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 01:16:56,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 01:16:56,115 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-08-19 01:16:56,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:56,115 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 01:16:56,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 01:16:56,115 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 01:16:56,116 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 01:16:56,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 01:16:56,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 01:16:56,263 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 01:16:56,263 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 01:16:56,263 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 01:16:56,263 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 01:16:56,263 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 01:16:56,264 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 01:16:56,264 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-19 01:16:56,264 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-19 01:16:56,264 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-19 01:16:56,264 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-19 01:16:56,264 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-08-19 01:16:56,264 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-08-19 01:16:56,265 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 66) no Hoare annotation was computed. [2020-08-19 01:16:56,265 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-19 01:16:56,265 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-19 01:16:56,265 INFO L268 CegarLoopResult]: For program point L48(lines 48 52) no Hoare annotation was computed. [2020-08-19 01:16:56,265 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-08-19 01:16:56,266 INFO L264 CegarLoopResult]: At program point L49(line 49) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-19 01:16:56,266 INFO L264 CegarLoopResult]: At program point L49-1(line 49) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-19 01:16:56,266 INFO L264 CegarLoopResult]: At program point L45(line 45) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-19 01:16:56,266 INFO L264 CegarLoopResult]: At program point L45-1(line 45) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-19 01:16:56,266 INFO L264 CegarLoopResult]: At program point L37-2(lines 37 61) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-19 01:16:56,267 INFO L264 CegarLoopResult]: At program point L37-3(lines 37 61) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-19 01:16:56,267 INFO L264 CegarLoopResult]: At program point L62(line 62) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-19 01:16:56,267 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-19 01:16:56,267 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 33) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-19 01:16:56,268 INFO L264 CegarLoopResult]: At program point L21-3(lines 21 33) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-19 01:16:56,268 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-08-19 01:16:56,268 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 66) no Hoare annotation was computed. [2020-08-19 01:16:56,268 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-08-19 01:16:56,268 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-19 01:16:56,268 INFO L271 CegarLoopResult]: At program point L63(lines 14 66) the Hoare annotation is: true [2020-08-19 01:16:56,269 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-19 01:16:56,269 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 66) the Hoare annotation is: true [2020-08-19 01:16:56,269 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-19 01:16:56,269 INFO L268 CegarLoopResult]: For program point L59(line 59) no Hoare annotation was computed. [2020-08-19 01:16:56,269 INFO L268 CegarLoopResult]: For program point L55(lines 55 57) no Hoare annotation was computed. [2020-08-19 01:16:56,269 INFO L268 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-08-19 01:16:56,270 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-08-19 01:16:56,270 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-08-19 01:16:56,270 INFO L268 CegarLoopResult]: For program point L43(lines 43 57) no Hoare annotation was computed. [2020-08-19 01:16:56,270 INFO L264 CegarLoopResult]: At program point L43-1(lines 43 57) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-19 01:16:56,270 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-19 01:16:56,271 INFO L264 CegarLoopResult]: At program point L39-1(line 39) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-19 01:16:56,271 INFO L268 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-08-19 01:16:56,271 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-19 01:16:56,271 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-19 01:16:56,271 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-19 01:16:56,271 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-19 01:16:56,271 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-19 01:16:56,272 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-19 01:16:56,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:16:56 BoogieIcfgContainer [2020-08-19 01:16:56,290 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:16:56,293 INFO L168 Benchmark]: Toolchain (without parser) took 2349.27 ms. Allocated memory was 140.5 MB in the beginning and 234.9 MB in the end (delta: 94.4 MB). Free memory was 103.1 MB in the beginning and 152.9 MB in the end (delta: -49.9 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. [2020-08-19 01:16:56,294 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 01:16:56,295 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.55 ms. Allocated memory is still 140.5 MB. Free memory was 102.8 MB in the beginning and 92.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-19 01:16:56,296 INFO L168 Benchmark]: Boogie Preprocessor took 112.51 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 181.8 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-19 01:16:56,297 INFO L168 Benchmark]: RCFGBuilder took 389.87 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 164.9 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-08-19 01:16:56,299 INFO L168 Benchmark]: TraceAbstraction took 1571.36 ms. Allocated memory was 203.4 MB in the beginning and 234.9 MB in the end (delta: 31.5 MB). Free memory was 164.3 MB in the beginning and 152.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. [2020-08-19 01:16:56,306 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.55 ms. Allocated memory is still 140.5 MB. Free memory was 102.8 MB in the beginning and 92.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.51 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 181.8 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 389.87 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 164.9 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1571.36 ms. Allocated memory was 203.4 MB in the beginning and 234.9 MB in the end (delta: 31.5 MB). Free memory was 164.3 MB in the beginning and 152.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 0 <= t && t <= tagbuf_len - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 0 <= t && t <= tagbuf_len - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 252 SDtfs, 50 SDslu, 490 SDs, 0 SdLazy, 231 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred 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, 5 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 24 LocationsWithAnnotation, 59 PreInvPairs, 82 NumberOfFragments, 152 HoareAnnotationTreeSize, 59 FomulaSimplifications, 52 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 24 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 3756 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 24/25 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...