/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:04:21,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:04:21,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:04:21,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:04:21,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:04:21,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:04:21,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:04:21,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:04:21,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:04:21,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:04:21,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:04:21,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:04:21,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:04:21,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:04:21,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:04:21,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:04:21,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:04:21,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:04:21,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:04:21,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:04:21,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:04:21,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:04:21,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:04:21,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:04:21,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 15:04:21,800 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 15:04:21,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 15:04:21,801 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 15:04:21,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 15:04:21,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 15:04:21,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:04:21,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:04:21,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:04:21,809 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 15:04:21,832 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:04:21,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:04:21,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:04:21,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:04:21,834 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:04:21,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:04:21,834 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:04:21,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:04:21,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:04:21,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:04:21,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:04:21,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:04:21,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:04:21,835 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:04:21,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:04:21,836 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:04:21,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:04:21,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:04:21,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:04:21,836 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:04:21,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:04:21,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:04:21,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:04:21,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:04:21,837 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:04:21,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:04:21,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:04:21,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:04:21,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:04:21,838 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 15:04:22,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:04:22,146 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:04:22,152 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:04:22,154 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:04:22,155 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:04:22,156 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-08-21 15:04:22,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f57c6e1c3/c928f648f43348d39b6fd77a0efd9bde/FLAG3ce62e692 [2020-08-21 15:04:22,723 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:04:22,723 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-08-21 15:04:22,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f57c6e1c3/c928f648f43348d39b6fd77a0efd9bde/FLAG3ce62e692 [2020-08-21 15:04:23,153 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f57c6e1c3/c928f648f43348d39b6fd77a0efd9bde [2020-08-21 15:04:23,163 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:04:23,165 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:04:23,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:04:23,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:04:23,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:04:23,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:04:23" (1/1) ... [2020-08-21 15:04:23,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@424943e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:23, skipping insertion in model container [2020-08-21 15:04:23,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:04:23" (1/1) ... [2020-08-21 15:04:23,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:04:23,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:04:23,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:04:23,388 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:04:23,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:04:23,422 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:04:23,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:23 WrapperNode [2020-08-21 15:04:23,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:04:23,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:04:23,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:04:23,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:04:23,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:23" (1/1) ... [2020-08-21 15:04:23,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:23" (1/1) ... [2020-08-21 15:04:23,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:23" (1/1) ... [2020-08-21 15:04:23,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:23" (1/1) ... [2020-08-21 15:04:23,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:23" (1/1) ... [2020-08-21 15:04:23,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:23" (1/1) ... [2020-08-21 15:04:23,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:23" (1/1) ... [2020-08-21 15:04:23,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:04:23,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:04:23,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:04:23,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:04:23,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:23" (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 15:04:23,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:04:23,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:04:23,606 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 15:04:23,606 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 15:04:23,606 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:04:23,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:04:23,607 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 15:04:23,607 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 15:04:23,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 15:04:23,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:04:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:04:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:04:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:04:23,854 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:04:23,854 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 15:04:23,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:04:23 BoogieIcfgContainer [2020-08-21 15:04:23,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:04:23,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:04:23,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:04:23,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:04:23,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:04:23" (1/3) ... [2020-08-21 15:04:23,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e7ce5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:04:23, skipping insertion in model container [2020-08-21 15:04:23,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:04:23" (2/3) ... [2020-08-21 15:04:23,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e7ce5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:04:23, skipping insertion in model container [2020-08-21 15:04:23,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:04:23" (3/3) ... [2020-08-21 15:04:23,867 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt5.c [2020-08-21 15:04:23,879 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:04:23,887 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:04:23,904 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:04:23,935 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:04:23,935 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:04:23,936 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:04:23,936 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:04:23,936 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:04:23,936 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:04:23,936 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:04:23,937 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:04:23,983 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-21 15:04:23,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 15:04:23,998 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:24,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:04:24,002 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:24,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:24,009 INFO L82 PathProgramCache]: Analyzing trace with hash 333887070, now seen corresponding path program 1 times [2020-08-21 15:04:24,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:24,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619708578] [2020-08-21 15:04:24,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:24,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:24,166 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 15:04:24,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619708578] [2020-08-21 15:04:24,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:24,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:04:24,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738878238] [2020-08-21 15:04:24,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:04:24,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:24,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:04:24,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:04:24,187 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-08-21 15:04:24,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:24,249 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-08-21 15:04:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:04:24,251 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-08-21 15:04:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:24,261 INFO L225 Difference]: With dead ends: 37 [2020-08-21 15:04:24,261 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 15:04:24,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 15:04:24,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 15:04:24,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 15:04:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 15:04:24,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-08-21 15:04:24,304 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2020-08-21 15:04:24,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:24,304 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-08-21 15:04:24,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:04:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-08-21 15:04:24,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 15:04:24,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:24,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:04:24,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:04:24,306 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:24,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:24,307 INFO L82 PathProgramCache]: Analyzing trace with hash 309875524, now seen corresponding path program 1 times [2020-08-21 15:04:24,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:24,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831574456] [2020-08-21 15:04:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:24,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:24,677 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 15:04:24,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831574456] [2020-08-21 15:04:24,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:24,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 15:04:24,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180018752] [2020-08-21 15:04:24,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:04:24,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:24,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:04:24,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:04:24,682 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 7 states. [2020-08-21 15:04:31,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:31,108 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2020-08-21 15:04:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:04:31,110 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-08-21 15:04:31,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:31,111 INFO L225 Difference]: With dead ends: 29 [2020-08-21 15:04:31,111 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 15:04:31,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:04:31,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 15:04:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2020-08-21 15:04:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-21 15:04:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-08-21 15:04:31,126 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-08-21 15:04:31,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:31,127 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-08-21 15:04:31,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:04:31,127 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-08-21 15:04:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 15:04:31,128 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:31,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:04:31,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:04:31,129 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:31,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:31,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1451693947, now seen corresponding path program 1 times [2020-08-21 15:04:31,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:31,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845093756] [2020-08-21 15:04:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:31,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:31,806 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 15:04:31,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845093756] [2020-08-21 15:04:31,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:04:31,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 15:04:31,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216335279] [2020-08-21 15:04:31,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 15:04:31,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:31,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 15:04:31,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-21 15:04:31,809 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 13 states. [2020-08-21 15:04:32,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:32,296 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2020-08-21 15:04:32,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 15:04:32,296 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-08-21 15:04:32,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:32,299 INFO L225 Difference]: With dead ends: 40 [2020-08-21 15:04:32,299 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 15:04:32,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-08-21 15:04:32,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 15:04:32,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2020-08-21 15:04:32,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 15:04:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-08-21 15:04:32,314 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-08-21 15:04:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:32,314 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-08-21 15:04:32,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 15:04:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-08-21 15:04:32,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 15:04:32,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:32,318 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:04:32,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:04:32,319 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:32,320 INFO L82 PathProgramCache]: Analyzing trace with hash -162414684, now seen corresponding path program 2 times [2020-08-21 15:04:32,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:32,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304242829] [2020-08-21 15:04:32,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:32,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:32,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304242829] [2020-08-21 15:04:32,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:04:32,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 15:04:32,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045281635] [2020-08-21 15:04:32,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:04:32,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:32,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:04:32,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:04:32,725 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2020-08-21 15:04:33,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:33,064 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2020-08-21 15:04:33,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 15:04:33,065 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-08-21 15:04:33,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:33,066 INFO L225 Difference]: With dead ends: 38 [2020-08-21 15:04:33,066 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 15:04:33,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-08-21 15:04:33,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 15:04:33,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2020-08-21 15:04:33,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 15:04:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-21 15:04:33,076 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2020-08-21 15:04:33,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:33,076 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-21 15:04:33,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:04:33,077 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-21 15:04:33,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 15:04:33,078 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:33,078 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:04:33,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:04:33,079 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:33,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:33,080 INFO L82 PathProgramCache]: Analyzing trace with hash -444322542, now seen corresponding path program 1 times [2020-08-21 15:04:33,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:33,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92354626] [2020-08-21 15:04:33,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:33,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:33,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92354626] [2020-08-21 15:04:33,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:04:33,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 15:04:33,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432422709] [2020-08-21 15:04:33,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:04:33,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:33,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:04:33,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:04:33,233 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-08-21 15:04:33,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:33,340 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-08-21 15:04:33,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:04:33,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-21 15:04:33,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:33,342 INFO L225 Difference]: With dead ends: 38 [2020-08-21 15:04:33,342 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 15:04:33,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:04:33,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 15:04:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-08-21 15:04:33,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 15:04:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-08-21 15:04:33,352 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 19 [2020-08-21 15:04:33,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:33,353 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-08-21 15:04:33,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:04:33,353 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-08-21 15:04:33,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 15:04:33,355 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:33,355 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:04:33,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:04:33,356 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:33,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:33,356 INFO L82 PathProgramCache]: Analyzing trace with hash -450980439, now seen corresponding path program 1 times [2020-08-21 15:04:33,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:33,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109295110] [2020-08-21 15:04:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:33,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:33,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109295110] [2020-08-21 15:04:33,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:04:33,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 15:04:33,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423809982] [2020-08-21 15:04:33,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:04:33,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:33,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:04:33,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:04:33,707 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2020-08-21 15:04:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:33,874 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-08-21 15:04:33,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:04:33,875 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-21 15:04:33,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:33,876 INFO L225 Difference]: With dead ends: 37 [2020-08-21 15:04:33,876 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 15:04:33,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:04:33,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 15:04:33,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-08-21 15:04:33,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 15:04:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-08-21 15:04:33,883 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2020-08-21 15:04:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:33,884 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-08-21 15:04:33,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:04:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-08-21 15:04:33,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 15:04:33,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:33,885 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:04:33,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:04:33,885 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:33,886 INFO L82 PathProgramCache]: Analyzing trace with hash -514824137, now seen corresponding path program 1 times [2020-08-21 15:04:33,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:33,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767572053] [2020-08-21 15:04:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:33,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:34,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767572053] [2020-08-21 15:04:34,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:04:34,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 15:04:34,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425691781] [2020-08-21 15:04:34,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:04:34,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:34,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:04:34,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:04:34,007 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-08-21 15:04:34,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:34,099 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-08-21 15:04:34,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:04:34,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-21 15:04:34,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:34,102 INFO L225 Difference]: With dead ends: 38 [2020-08-21 15:04:34,103 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 15:04:34,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:04:34,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 15:04:34,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-08-21 15:04:34,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 15:04:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-21 15:04:34,110 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2020-08-21 15:04:34,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:34,110 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-21 15:04:34,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:04:34,111 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-21 15:04:34,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 15:04:34,113 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:34,113 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:04:34,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:04:34,113 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:34,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:34,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1260183225, now seen corresponding path program 1 times [2020-08-21 15:04:34,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:34,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935307298] [2020-08-21 15:04:34,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:34,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:34,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935307298] [2020-08-21 15:04:34,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:04:34,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 15:04:34,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755735356] [2020-08-21 15:04:34,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 15:04:34,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:34,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 15:04:34,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-21 15:04:34,798 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 15 states. [2020-08-21 15:04:37,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:37,611 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-08-21 15:04:37,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 15:04:37,612 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2020-08-21 15:04:37,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:37,613 INFO L225 Difference]: With dead ends: 37 [2020-08-21 15:04:37,613 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 15:04:37,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-08-21 15:04:37,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 15:04:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-08-21 15:04:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 15:04:37,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-21 15:04:37,623 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2020-08-21 15:04:37,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:37,624 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-21 15:04:37,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 15:04:37,624 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-21 15:04:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 15:04:37,626 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:37,626 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:04:37,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:04:37,628 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:37,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1035578608, now seen corresponding path program 2 times [2020-08-21 15:04:37,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:37,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839391716] [2020-08-21 15:04:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:37,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:37,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839391716] [2020-08-21 15:04:37,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:04:37,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 15:04:37,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962389056] [2020-08-21 15:04:37,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:04:37,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:37,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:04:37,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:04:37,820 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-08-21 15:04:40,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:40,024 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-08-21 15:04:40,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:04:40,024 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-08-21 15:04:40,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:40,025 INFO L225 Difference]: With dead ends: 41 [2020-08-21 15:04:40,026 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 15:04:40,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:04:40,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 15:04:40,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-21 15:04:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-21 15:04:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-21 15:04:40,033 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2020-08-21 15:04:40,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:40,033 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-21 15:04:40,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:04:40,033 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-21 15:04:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 15:04:40,034 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:40,034 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:04:40,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 15:04:40,035 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:40,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1961236154, now seen corresponding path program 1 times [2020-08-21 15:04:40,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:40,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932548900] [2020-08-21 15:04:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:40,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:40,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932548900] [2020-08-21 15:04:40,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:04:40,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 15:04:40,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843807998] [2020-08-21 15:04:40,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:04:40,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:40,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:04:40,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:04:40,154 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2020-08-21 15:04:40,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:40,283 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-08-21 15:04:40,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:04:40,284 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-08-21 15:04:40,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:40,285 INFO L225 Difference]: With dead ends: 44 [2020-08-21 15:04:40,285 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 15:04:40,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:04:40,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 15:04:40,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-08-21 15:04:40,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 15:04:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-21 15:04:40,291 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 25 [2020-08-21 15:04:40,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:40,292 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-21 15:04:40,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:04:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-21 15:04:40,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 15:04:40,293 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:40,293 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:04:40,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 15:04:40,293 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:40,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:40,294 INFO L82 PathProgramCache]: Analyzing trace with hash -230662155, now seen corresponding path program 1 times [2020-08-21 15:04:40,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:40,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381107352] [2020-08-21 15:04:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:44,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:04:44,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381107352] [2020-08-21 15:04:44,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:04:44,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 15:04:44,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791484480] [2020-08-21 15:04:44,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:04:44,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:44,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:04:44,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=20, Unknown=1, NotChecked=0, Total=30 [2020-08-21 15:04:44,604 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-08-21 15:04:45,102 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2020-08-21 15:04:54,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:54,696 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2020-08-21 15:04:54,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:04:54,696 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-08-21 15:04:54,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:54,697 INFO L225 Difference]: With dead ends: 43 [2020-08-21 15:04:54,697 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 15:04:54,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=26, Invalid=61, Unknown=3, NotChecked=0, Total=90 [2020-08-21 15:04:54,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 15:04:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-21 15:04:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-21 15:04:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-21 15:04:54,704 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2020-08-21 15:04:54,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:54,704 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-21 15:04:54,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:04:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-21 15:04:54,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 15:04:54,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:04:54,705 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:04:54,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 15:04:54,706 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:04:54,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:04:54,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2020075371, now seen corresponding path program 1 times [2020-08-21 15:04:54,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:04:54,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716397736] [2020-08-21 15:04:54,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:04:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:54,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:04:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:04:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 15:04:54,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716397736] [2020-08-21 15:04:54,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:04:54,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 15:04:54,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695052803] [2020-08-21 15:04:54,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:04:54,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:04:54,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:04:54,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:04:54,838 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2020-08-21 15:04:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:04:54,952 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-21 15:04:54,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:04:54,953 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-21 15:04:54,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:04:54,953 INFO L225 Difference]: With dead ends: 31 [2020-08-21 15:04:54,953 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 15:04:54,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:04:54,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 15:04:54,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 15:04:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 15:04:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 15:04:54,955 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-21 15:04:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:04:54,956 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 15:04:54,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:04:54,956 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 15:04:54,956 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 15:04:54,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 15:04:54,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 15:04:55,109 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 15:04:55,109 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~SIZE~0 |old(~SIZE~0)|) [2020-08-21 15:04:55,110 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 15:04:55,110 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 15:04:55,110 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2020-08-21 15:04:55,110 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 15:04:55,110 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 15:04:55,110 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-21 15:04:55,110 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-21 15:04:55,111 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-21 15:04:55,111 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-21 15:04:55,111 INFO L268 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-08-21 15:04:55,111 INFO L268 CegarLoopResult]: For program point L27(lines 27 30) no Hoare annotation was computed. [2020-08-21 15:04:55,111 INFO L268 CegarLoopResult]: For program point L25(lines 25 30) no Hoare annotation was computed. [2020-08-21 15:04:55,111 INFO L268 CegarLoopResult]: For program point L27-2(lines 21 30) no Hoare annotation was computed. [2020-08-21 15:04:55,111 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 35) no Hoare annotation was computed. [2020-08-21 15:04:55,112 INFO L268 CegarLoopResult]: For program point L23(lines 23 30) no Hoare annotation was computed. [2020-08-21 15:04:55,112 INFO L268 CegarLoopResult]: For program point L21(lines 21 30) no Hoare annotation was computed. [2020-08-21 15:04:55,112 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 32) the Hoare annotation is: (or (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v3~0 main_~v4~0))) (and (<= main_~l~0 .cse0) (<= .cse0 main_~l~0))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2020-08-21 15:04:55,112 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 32) the Hoare annotation is: (or (let ((.cse1 (+ main_~i~0 main_~j~0 main_~k~0 main_~v3~0 main_~v4~0 (* 4294967296 (div main_~l~0 4294967296)))) (.cse0 (* 4294967296 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v3~0 main_~v4~0) 4294967296)))) (and (<= (+ main_~l~0 .cse0) .cse1) (< .cse1 (+ main_~l~0 .cse0 1)))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2020-08-21 15:04:55,112 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 35) no Hoare annotation was computed. [2020-08-21 15:04:55,113 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 35) the Hoare annotation is: true [2020-08-21 15:04:55,113 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-08-21 15:04:55,113 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-21 15:04:55,113 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-21 15:04:55,113 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 15:04:55,113 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-21 15:04:55,113 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-21 15:04:55,114 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-21 15:04:55,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:04:55 BoogieIcfgContainer [2020-08-21 15:04:55,135 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:04:55,137 INFO L168 Benchmark]: Toolchain (without parser) took 31972.62 ms. Allocated memory was 138.9 MB in the beginning and 281.0 MB in the end (delta: 142.1 MB). Free memory was 101.8 MB in the beginning and 247.0 MB in the end (delta: -145.3 MB). Peak memory consumption was 149.4 MB. Max. memory is 7.1 GB. [2020-08-21 15:04:55,138 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 15:04:55,139 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.42 ms. Allocated memory is still 138.9 MB. Free memory was 101.6 MB in the beginning and 91.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-21 15:04:55,140 INFO L168 Benchmark]: Boogie Preprocessor took 112.03 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.8 MB in the beginning and 179.7 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-21 15:04:55,141 INFO L168 Benchmark]: RCFGBuilder took 323.20 ms. Allocated memory is still 201.3 MB. Free memory was 179.7 MB in the beginning and 164.6 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2020-08-21 15:04:55,141 INFO L168 Benchmark]: TraceAbstraction took 31275.69 ms. Allocated memory was 201.3 MB in the beginning and 281.0 MB in the end (delta: 79.7 MB). Free memory was 164.6 MB in the beginning and 247.0 MB in the end (delta: -82.5 MB). Peak memory consumption was 149.8 MB. Max. memory is 7.1 GB. [2020-08-21 15:04:55,145 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 256.42 ms. Allocated memory is still 138.9 MB. Free memory was 101.6 MB in the beginning and 91.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.03 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.8 MB in the beginning and 179.7 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 323.20 ms. Allocated memory is still 201.3 MB. Free memory was 179.7 MB in the beginning and 164.6 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 31275.69 ms. Allocated memory was 201.3 MB in the beginning and 281.0 MB in the end (delta: 79.7 MB). Free memory was 164.6 MB in the beginning and 247.0 MB in the end (delta: -82.5 MB). Peak memory consumption was 149.8 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: 19]: Loop Invariant Derived loop invariant: ((l <= i + j + k + v3 + v4 && i + j + k + v3 + v4 <= l) || !(SIZE <= 20000001)) || !(20000001 <= SIZE) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 31.0s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 23.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 148 SDtfs, 537 SDslu, 241 SDs, 0 SdLazy, 785 SolverSat, 136 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 16.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 32 SyntacticMatches, 12 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 11.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 27 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 19 PreInvPairs, 27 NumberOfFragments, 98 HoareAnnotationTreeSize, 19 FomulaSimplifications, 533 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 248 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.0s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 228 ConstructedInterpolants, 0 QuantifiedInterpolants, 52122 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 42/80 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...