/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:56:48,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:56:48,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:56:48,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:56:48,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:56:48,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:56:48,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:56:48,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:56:48,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:56:48,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:56:48,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:56:48,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:56:48,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:56:48,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:56:48,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:56:48,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:56:48,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:56:48,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:56:48,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:56:48,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:56:48,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:56:48,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:56:48,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:56:48,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:56:48,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 22:56:48,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 22:56:48,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 22:56:48,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 22:56:48,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 22:56:48,731 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 22:56:48,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:56:48,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:56:48,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:56:48,738 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 [2020-08-21 22:56:48,762 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:56:48,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:56:48,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:56:48,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:56:48,764 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:56:48,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:56:48,765 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:56:48,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:56:48,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:56:48,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:56:48,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:56:48,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:56:48,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:56:48,766 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:56:48,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:56:48,766 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:56:48,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:56:48,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:56:48,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:56:48,767 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:56:48,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:56:48,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:56:48,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:56:48,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:56:48,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:56:48,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:56:48,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:56:48,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:56:48,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:56:48,769 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=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 22:56:49,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:56:49,071 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:56:49,075 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:56:49,077 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:56:49,077 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:56:49,078 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-08-21 22:56:49,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0f0393af/ec42d4eff8b54a368bb2ff4c92e73759/FLAG08864ec26 [2020-08-21 22:56:49,583 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:56:49,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-08-21 22:56:49,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0f0393af/ec42d4eff8b54a368bb2ff4c92e73759/FLAG08864ec26 [2020-08-21 22:56:49,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0f0393af/ec42d4eff8b54a368bb2ff4c92e73759 [2020-08-21 22:56:49,925 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:56:49,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:56:49,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:56:49,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:56:49,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:56:49,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:56:49" (1/1) ... [2020-08-21 22:56:49,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ca44a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:49, skipping insertion in model container [2020-08-21 22:56:49,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:56:49" (1/1) ... [2020-08-21 22:56:49,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:56:49,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:56:50,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:56:50,171 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:56:50,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:56:50,228 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:56:50,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:50 WrapperNode [2020-08-21 22:56:50,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:56:50,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:56:50,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:56:50,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:56:50,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:50" (1/1) ... [2020-08-21 22:56:50,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:50" (1/1) ... [2020-08-21 22:56:50,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:50" (1/1) ... [2020-08-21 22:56:50,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:50" (1/1) ... [2020-08-21 22:56:50,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:50" (1/1) ... [2020-08-21 22:56:50,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:50" (1/1) ... [2020-08-21 22:56:50,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:50" (1/1) ... [2020-08-21 22:56:50,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:56:50,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:56:50,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:56:50,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:56:50,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:50" (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 [2020-08-21 22:56:50,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:56:50,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:56:50,427 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 22:56:50,427 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:56:50,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:56:50,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 22:56:50,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 22:56:50,429 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:56:50,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:56:50,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:56:50,748 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:56:50,748 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 22:56:50,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:56:50 BoogieIcfgContainer [2020-08-21 22:56:50,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:56:50,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:56:50,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:56:50,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:56:50,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:56:49" (1/3) ... [2020-08-21 22:56:50,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a9f51e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:56:50, skipping insertion in model container [2020-08-21 22:56:50,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:50" (2/3) ... [2020-08-21 22:56:50,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a9f51e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:56:50, skipping insertion in model container [2020-08-21 22:56:50,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:56:50" (3/3) ... [2020-08-21 22:56:50,769 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-08-21 22:56:50,780 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:56:50,789 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:56:50,801 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:56:50,828 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:56:50,828 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:56:50,831 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:56:50,831 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:56:50,831 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:56:50,831 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:56:50,831 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:56:50,831 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:56:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-21 22:56:50,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 22:56:50,861 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:50,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:56:50,862 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:50,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:50,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1906239810, now seen corresponding path program 1 times [2020-08-21 22:56:50,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:50,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064731278] [2020-08-21 22:56:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:56:50,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064731278] [2020-08-21 22:56:50,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:56:50,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 22:56:50,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947514082] [2020-08-21 22:56:50,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 22:56:50,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:51,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 22:56:51,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 22:56:51,014 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-08-21 22:56:51,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:51,038 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2020-08-21 22:56:51,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 22:56:51,040 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-21 22:56:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:51,048 INFO L225 Difference]: With dead ends: 38 [2020-08-21 22:56:51,049 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 22:56:51,053 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 [2020-08-21 22:56:51,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 22:56:51,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 22:56:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 22:56:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2020-08-21 22:56:51,108 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 10 [2020-08-21 22:56:51,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:51,110 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions. [2020-08-21 22:56:51,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 22:56:51,111 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions. [2020-08-21 22:56:51,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 22:56:51,113 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:51,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:56:51,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:56:51,114 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:51,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:51,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1847134466, now seen corresponding path program 1 times [2020-08-21 22:56:51,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:51,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951078071] [2020-08-21 22:56:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,351 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2020-08-21 22:56:51,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:56:51,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951078071] [2020-08-21 22:56:51,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:56:51,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:56:51,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563784524] [2020-08-21 22:56:51,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:56:51,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:51,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:56:51,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:56:51,380 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand 3 states. [2020-08-21 22:56:51,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:51,476 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2020-08-21 22:56:51,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:56:51,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-21 22:56:51,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:51,480 INFO L225 Difference]: With dead ends: 28 [2020-08-21 22:56:51,480 INFO L226 Difference]: Without dead ends: 23 [2020-08-21 22:56:51,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:56:51,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-21 22:56:51,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-08-21 22:56:51,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 22:56:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2020-08-21 22:56:51,489 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 10 [2020-08-21 22:56:51,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:51,489 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2020-08-21 22:56:51,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:56:51,490 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2020-08-21 22:56:51,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:56:51,491 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:51,491 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] [2020-08-21 22:56:51,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:56:51,491 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:51,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:51,492 INFO L82 PathProgramCache]: Analyzing trace with hash -129940435, now seen corresponding path program 1 times [2020-08-21 22:56:51,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:51,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854138011] [2020-08-21 22:56:51,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:56:51,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854138011] [2020-08-21 22:56:51,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:51,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:56:51,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640535402] [2020-08-21 22:56:51,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:56:51,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:51,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:56:51,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:56:51,802 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand 10 states. [2020-08-21 22:56:52,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:52,855 INFO L93 Difference]: Finished difference Result 100 states and 182 transitions. [2020-08-21 22:56:52,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:56:52,855 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-08-21 22:56:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:52,857 INFO L225 Difference]: With dead ends: 100 [2020-08-21 22:56:52,858 INFO L226 Difference]: Without dead ends: 95 [2020-08-21 22:56:52,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:56:52,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-21 22:56:52,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2020-08-21 22:56:52,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 22:56:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 138 transitions. [2020-08-21 22:56:52,876 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 138 transitions. Word has length 21 [2020-08-21 22:56:52,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:52,877 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 138 transitions. [2020-08-21 22:56:52,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:56:52,877 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 138 transitions. [2020-08-21 22:56:52,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:56:52,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:52,879 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] [2020-08-21 22:56:52,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:56:52,879 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:52,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:52,880 INFO L82 PathProgramCache]: Analyzing trace with hash 550117935, now seen corresponding path program 1 times [2020-08-21 22:56:52,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:52,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193071360] [2020-08-21 22:56:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:56:53,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193071360] [2020-08-21 22:56:53,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:56:53,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:56:53,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416678932] [2020-08-21 22:56:53,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:56:53,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:53,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:56:53,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:56:53,075 INFO L87 Difference]: Start difference. First operand 78 states and 138 transitions. Second operand 3 states. [2020-08-21 22:56:53,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:53,181 INFO L93 Difference]: Finished difference Result 110 states and 195 transitions. [2020-08-21 22:56:53,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:56:53,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:56:53,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:53,184 INFO L225 Difference]: With dead ends: 110 [2020-08-21 22:56:53,185 INFO L226 Difference]: Without dead ends: 40 [2020-08-21 22:56:53,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:56:53,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-21 22:56:53,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-08-21 22:56:53,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 22:56:53,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2020-08-21 22:56:53,194 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 21 [2020-08-21 22:56:53,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:53,194 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2020-08-21 22:56:53,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:56:53,195 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2020-08-21 22:56:53,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:56:53,196 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:53,196 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] [2020-08-21 22:56:53,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:56:53,197 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:53,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:53,197 INFO L82 PathProgramCache]: Analyzing trace with hash 263086575, now seen corresponding path program 1 times [2020-08-21 22:56:53,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:53,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689288624] [2020-08-21 22:56:53,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:56:53,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689288624] [2020-08-21 22:56:53,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:53,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 22:56:53,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765955275] [2020-08-21 22:56:53,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 22:56:53,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:53,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 22:56:53,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:56:53,450 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 13 states. [2020-08-21 22:56:53,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:53,633 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-08-21 22:56:53,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 22:56:53,634 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-08-21 22:56:53,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:53,636 INFO L225 Difference]: With dead ends: 51 [2020-08-21 22:56:53,636 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 22:56:53,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:56:53,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 22:56:53,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-21 22:56:53,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-21 22:56:53,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-08-21 22:56:53,655 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 21 [2020-08-21 22:56:53,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:53,656 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-08-21 22:56:53,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 22:56:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-08-21 22:56:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:56:53,664 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:53,665 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] [2020-08-21 22:56:53,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:56:53,666 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:53,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:53,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1016777103, now seen corresponding path program 1 times [2020-08-21 22:56:53,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:53,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641168923] [2020-08-21 22:56:53,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:56:53,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641168923] [2020-08-21 22:56:53,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:56:53,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:56:53,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931625371] [2020-08-21 22:56:53,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:56:53,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:53,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:56:53,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:56:53,729 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 3 states. [2020-08-21 22:56:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:53,792 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-08-21 22:56:53,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:56:53,793 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:56:53,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:53,794 INFO L225 Difference]: With dead ends: 61 [2020-08-21 22:56:53,794 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 22:56:53,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:56:53,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 22:56:53,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-08-21 22:56:53,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-21 22:56:53,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-08-21 22:56:53,801 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 21 [2020-08-21 22:56:53,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:53,802 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-08-21 22:56:53,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:56:53,802 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-08-21 22:56:53,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:56:53,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:53,803 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] [2020-08-21 22:56:53,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:56:53,804 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:53,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:53,804 INFO L82 PathProgramCache]: Analyzing trace with hash -345519953, now seen corresponding path program 1 times [2020-08-21 22:56:53,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:53,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865773884] [2020-08-21 22:56:53,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 22:56:53,833 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 22:56:53,833 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 22:56:53,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:56:53,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:56:53 BoogieIcfgContainer [2020-08-21 22:56:53,860 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:56:53,863 INFO L168 Benchmark]: Toolchain (without parser) took 3935.35 ms. Allocated memory was 139.5 MB in the beginning and 245.9 MB in the end (delta: 106.4 MB). Free memory was 102.3 MB in the beginning and 178.9 MB in the end (delta: -76.6 MB). Peak memory consumption was 29.8 MB. Max. memory is 7.1 GB. [2020-08-21 22:56:53,865 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-21 22:56:53,871 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.52 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 92.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-21 22:56:53,873 INFO L168 Benchmark]: Boogie Preprocessor took 123.17 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.0 MB in the beginning and 179.2 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 22:56:53,873 INFO L168 Benchmark]: RCFGBuilder took 399.66 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 163.7 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2020-08-21 22:56:53,874 INFO L168 Benchmark]: TraceAbstraction took 3102.70 ms. Allocated memory was 201.9 MB in the beginning and 245.9 MB in the end (delta: 44.0 MB). Free memory was 162.7 MB in the beginning and 178.9 MB in the end (delta: -16.2 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. [2020-08-21 22:56:53,887 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 299.52 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 92.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.17 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.0 MB in the beginning and 179.2 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 399.66 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 163.7 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3102.70 ms. Allocated memory was 201.9 MB in the beginning and 245.9 MB in the end (delta: 44.0 MB). Free memory was 162.7 MB in the beginning and 178.9 MB in the end (delta: -16.2 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int x = 0; [L13] unsigned int y = __VERIFIER_nondet_uint(); [L15] COND TRUE x < 99 [L16] COND FALSE !(y % 2 == 0) [L17] x += 2 [L19] COND FALSE !(y % 2 == 0) [L20] x -= 2 [L22] COND FALSE !(y % 2 == 0) [L23] x += 2 [L25] COND FALSE !(y % 2 == 0) [L26] x -= 2 [L28] COND FALSE !(y % 2 == 0) [L29] x += 2 [L31] COND FALSE !(y % 2 == 0) [L32] x -= 4 [L34] COND FALSE !(y % 2 == 0) [L35] x += 4 [L37] COND FALSE !(y % 2 == 0) [L38] x += 2 [L40] COND FALSE !(y % 2 == 0) [L41] x -= 4 [L43] COND FALSE !(y % 2 == 0) [L44] x -= 4 [L15] COND FALSE !(x < 99) [L47] CALL __VERIFIER_assert((x % 2) == (y % 2)) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.0s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 139 SDtfs, 31 SDslu, 60 SDs, 0 SdLazy, 1106 SolverSat, 209 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=3, 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, 28 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 7076 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 2/4 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 incorrect! Received shutdown request...