/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 produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:36:34,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:36:34,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:36:34,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:36:34,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:36:34,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:36:34,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:36:34,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:36:34,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:36:34,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:36:34,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:36:34,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:36:34,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:36:34,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:36:34,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:36:34,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:36:34,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:36:34,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:36:34,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:36:34,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:36:34,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:36:34,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:36:34,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:36:34,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:36:34,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:36:34,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:36:34,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:36:34,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:36:34,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:36:34,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:36:34,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:36:34,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:36:34,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:36:34,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:36:34,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:36:34,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:36:34,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:36:34,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:36:34,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:36:34,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:36:34,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:36:34,107 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 [2020-09-21 12:36:34,153 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:36:34,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:36:34,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:36:34,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:36:34,156 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:36:34,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:36:34,157 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:36:34,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:36:34,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:36:34,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:36:34,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:36:34,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:36:34,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:36:34,159 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:36:34,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:36:34,160 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:36:34,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:36:34,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:36:34,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:36:34,161 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:36:34,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:36:34,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:36:34,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:36:34,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:36:34,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:36:34,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:36:34,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:36:34,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:36:34,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:36:34,163 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:36:34,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:36:34,710 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:36:34,715 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:36:34,717 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:36:34,718 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:36:34,719 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2020-09-21 12:36:34,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e878c7be/251a0ce240f84804bd57bd5c7dd6b8ae/FLAGb2157989d [2020-09-21 12:36:35,364 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:36:35,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/half.i [2020-09-21 12:36:35,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e878c7be/251a0ce240f84804bd57bd5c7dd6b8ae/FLAGb2157989d [2020-09-21 12:36:35,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e878c7be/251a0ce240f84804bd57bd5c7dd6b8ae [2020-09-21 12:36:35,733 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:36:35,739 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:36:35,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:36:35,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:36:35,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:36:35,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:36:35" (1/1) ... [2020-09-21 12:36:35,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6251f5ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:35, skipping insertion in model container [2020-09-21 12:36:35,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:36:35" (1/1) ... [2020-09-21 12:36:35,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:36:35,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:36:36,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:36:36,036 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:36:36,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:36:36,076 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:36:36,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:36 WrapperNode [2020-09-21 12:36:36,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:36:36,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:36:36,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:36:36,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:36:36,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:36" (1/1) ... [2020-09-21 12:36:36,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:36" (1/1) ... [2020-09-21 12:36:36,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:36" (1/1) ... [2020-09-21 12:36:36,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:36" (1/1) ... [2020-09-21 12:36:36,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:36" (1/1) ... [2020-09-21 12:36:36,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:36" (1/1) ... [2020-09-21 12:36:36,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:36" (1/1) ... [2020-09-21 12:36:36,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:36:36,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:36:36,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:36:36,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:36:36,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:36" (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 [2020-09-21 12:36:36,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:36:36,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:36:36,281 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:36:36,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:36:36,281 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:36:36,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:36:36,282 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:36:36,282 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:36:36,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:36:36,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:36:36,282 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:36:36,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:36:36,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:36:36,508 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:36:36,508 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 12:36:36,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:36:36 BoogieIcfgContainer [2020-09-21 12:36:36,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:36:36,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:36:36,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:36:36,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:36:36,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:36:35" (1/3) ... [2020-09-21 12:36:36,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff5aba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:36:36, skipping insertion in model container [2020-09-21 12:36:36,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:36" (2/3) ... [2020-09-21 12:36:36,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff5aba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:36:36, skipping insertion in model container [2020-09-21 12:36:36,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:36:36" (3/3) ... [2020-09-21 12:36:36,524 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2020-09-21 12:36:36,535 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:36:36,545 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:36:36,567 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:36:36,599 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:36:36,599 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:36:36,600 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:36:36,600 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:36:36,600 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:36:36,600 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:36:36,600 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:36:36,600 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:36:36,624 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-09-21 12:36:36,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 12:36:36,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:36,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:36,633 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:36,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:36,640 INFO L82 PathProgramCache]: Analyzing trace with hash -961315073, now seen corresponding path program 1 times [2020-09-21 12:36:36,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:36,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099713906] [2020-09-21 12:36:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:36,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:36,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:36,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:36:36,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:36,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-21 12:36:36,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:36,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:36,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:36:36,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:36,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:36:36,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:36,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:36,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:36,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:36,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:36,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:36:36,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:36,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:36,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:36,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:36,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:36,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099713906] [2020-09-21 12:36:36,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:36:36,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 12:36:36,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769210066] [2020-09-21 12:36:36,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 12:36:36,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:36,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 12:36:36,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 12:36:36,920 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-09-21 12:36:36,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:36,950 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-09-21 12:36:36,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 12:36:36,952 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-21 12:36:36,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:36,963 INFO L225 Difference]: With dead ends: 33 [2020-09-21 12:36:36,964 INFO L226 Difference]: Without dead ends: 14 [2020-09-21 12:36:36,968 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 [2020-09-21 12:36:36,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-21 12:36:37,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-09-21 12:36:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-09-21 12:36:37,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-09-21 12:36:37,015 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-09-21 12:36:37,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:37,015 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-09-21 12:36:37,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 12:36:37,016 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-09-21 12:36:37,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 12:36:37,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:37,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:37,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:36:37,018 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:37,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:37,018 INFO L82 PathProgramCache]: Analyzing trace with hash -971473804, now seen corresponding path program 1 times [2020-09-21 12:36:37,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:37,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44594725] [2020-09-21 12:36:37,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:37,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:37,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:37,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:36:37,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:37,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-09-21 12:36:37,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:37,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:36:37,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:37,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:36:37,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:37,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:37,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:37,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:37,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:37,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:37,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:36:37,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:37,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:37,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:37,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:37,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:37,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44594725] [2020-09-21 12:36:37,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:36:37,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 12:36:37,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077629011] [2020-09-21 12:36:37,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:36:37,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:37,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:36:37,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:36:37,450 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2020-09-21 12:36:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:37,645 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-09-21 12:36:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:36:37,646 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-21 12:36:37,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:37,650 INFO L225 Difference]: With dead ends: 26 [2020-09-21 12:36:37,650 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 12:36:37,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:36:37,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 12:36:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-09-21 12:36:37,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-09-21 12:36:37,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-09-21 12:36:37,660 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-09-21 12:36:37,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:37,660 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-09-21 12:36:37,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:36:37,660 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-09-21 12:36:37,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 12:36:37,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:37,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:37,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:36:37,662 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:37,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:37,663 INFO L82 PathProgramCache]: Analyzing trace with hash -18708286, now seen corresponding path program 1 times [2020-09-21 12:36:37,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:37,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237383932] [2020-09-21 12:36:37,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:37,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:37,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:37,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:37,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 12:36:37,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:36:37,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-09-21 12:36:37,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:37,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:36:37,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:36:37,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:36:37,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:36:37,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:37,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:37,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:37,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:37,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:37,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:36:37,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:37,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:37,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:37,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:37,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:37,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237383932] [2020-09-21 12:36:37,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:36:37,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:36:37,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626137891] [2020-09-21 12:36:37,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:36:37,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:37,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:36:37,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:36:37,999 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-09-21 12:36:38,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:38,029 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-09-21 12:36:38,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:36:38,030 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-09-21 12:36:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:38,031 INFO L225 Difference]: With dead ends: 22 [2020-09-21 12:36:38,031 INFO L226 Difference]: Without dead ends: 17 [2020-09-21 12:36:38,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:36:38,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-09-21 12:36:38,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-09-21 12:36:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-21 12:36:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-09-21 12:36:38,037 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2020-09-21 12:36:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:38,037 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-09-21 12:36:38,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:36:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-09-21 12:36:38,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 12:36:38,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:38,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:38,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:36:38,039 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:38,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:38,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1756299076, now seen corresponding path program 1 times [2020-09-21 12:36:38,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:38,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912613396] [2020-09-21 12:36:38,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:38,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:38,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:38,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:38,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:38,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 12:36:38,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:36:38,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-21 12:36:38,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:38,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:36:38,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:36:38,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 12:36:38,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:38,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:38,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:38,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:38,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:38,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:38,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:36:38,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:38,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:38,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:38,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:38,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:38,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912613396] [2020-09-21 12:36:38,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:36:38,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:36:38,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739682852] [2020-09-21 12:36:38,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:36:38,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:38,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:36:38,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:36:38,195 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 3 states. [2020-09-21 12:36:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:38,216 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-09-21 12:36:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:36:38,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-09-21 12:36:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:38,217 INFO L225 Difference]: With dead ends: 29 [2020-09-21 12:36:38,218 INFO L226 Difference]: Without dead ends: 19 [2020-09-21 12:36:38,218 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 [2020-09-21 12:36:38,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-21 12:36:38,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-09-21 12:36:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 12:36:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-21 12:36:38,223 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-09-21 12:36:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:38,224 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-21 12:36:38,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:36:38,224 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-21 12:36:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 12:36:38,225 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:38,225 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:38,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:36:38,225 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:38,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:38,225 INFO L82 PathProgramCache]: Analyzing trace with hash 154986550, now seen corresponding path program 1 times [2020-09-21 12:36:38,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:38,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429220973] [2020-09-21 12:36:38,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:38,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:38,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:38,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:38,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 12:36:38,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:36:38,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-21 12:36:38,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:38,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:36:38,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:38,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:36:38,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:38,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:38,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:38,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:38,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:38,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:38,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:36:38,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:38,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:38,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:38,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:38,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:38,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429220973] [2020-09-21 12:36:38,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:38,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 12:36:38,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11238377] [2020-09-21 12:36:38,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:36:38,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:38,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:36:38,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:36:38,556 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 11 states. [2020-09-21 12:36:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:38,695 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-09-21 12:36:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:36:38,696 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-09-21 12:36:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:38,697 INFO L225 Difference]: With dead ends: 29 [2020-09-21 12:36:38,697 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 12:36:38,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:36:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 12:36:38,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-09-21 12:36:38,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 12:36:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-09-21 12:36:38,704 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2020-09-21 12:36:38,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:38,704 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-09-21 12:36:38,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:36:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-09-21 12:36:38,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 12:36:38,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:38,706 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:38,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:36:38,706 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:38,707 INFO L82 PathProgramCache]: Analyzing trace with hash -344718844, now seen corresponding path program 2 times [2020-09-21 12:36:38,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:38,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967536309] [2020-09-21 12:36:38,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:38,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:38,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:38,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:38,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:38,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:39,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:39,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:39,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:36:39,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-21 12:36:39,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-09-21 12:36:39,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:36:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:36:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:36:39,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:39,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:39,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:39,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:39,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:39,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:39,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:36:39,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:39,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:39,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:39,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:39,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 12:36:39,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967536309] [2020-09-21 12:36:39,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:39,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-21 12:36:39,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637236734] [2020-09-21 12:36:39,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:36:39,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:39,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:36:39,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:36:39,444 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2020-09-21 12:36:39,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:39,484 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-09-21 12:36:39,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:36:39,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-09-21 12:36:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:39,488 INFO L225 Difference]: With dead ends: 35 [2020-09-21 12:36:39,488 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 12:36:39,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:36:39,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 12:36:39,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-09-21 12:36:39,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 12:36:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-09-21 12:36:39,503 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2020-09-21 12:36:39,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:39,506 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-09-21 12:36:39,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:36:39,506 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-09-21 12:36:39,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:36:39,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:39,507 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:39,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:36:39,508 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:39,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1298269576, now seen corresponding path program 3 times [2020-09-21 12:36:39,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:39,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809799480] [2020-09-21 12:36:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:39,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:39,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:39,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:39,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 12:36:39,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:36:39,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-09-21 12:36:39,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:39,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 12:36:39,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:39,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 12:36:39,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:39,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:39,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:39,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:39,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:39,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:39,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:36:39,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:39,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:39,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:39,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:39,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:36:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:36:39,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809799480] [2020-09-21 12:36:39,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:36:39,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 12:36:39,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887204493] [2020-09-21 12:36:39,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 12:36:39,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:39,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 12:36:39,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:36:39,927 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 13 states. [2020-09-21 12:36:40,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:40,181 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-09-21 12:36:40,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:36:40,182 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-09-21 12:36:40,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:40,182 INFO L225 Difference]: With dead ends: 36 [2020-09-21 12:36:40,183 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 12:36:40,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-21 12:36:40,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 12:36:40,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 12:36:40,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 12:36:40,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 12:36:40,186 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-09-21 12:36:40,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:40,187 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 12:36:40,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 12:36:40,187 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 12:36:40,187 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 12:36:40,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:36:40,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 12:36:40,387 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 12:36:40,388 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:36:40,388 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:36:40,388 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 12:36:40,388 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 12:36:40,388 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:36:40,388 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-21 12:36:40,389 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-21 12:36:40,389 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-09-21 12:36:40,389 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-21 12:36:40,389 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 25) the Hoare annotation is: true [2020-09-21 12:36:40,389 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 25) no Hoare annotation was computed. [2020-09-21 12:36:40,389 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-09-21 12:36:40,389 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-09-21 12:36:40,390 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-21 12:36:40,390 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 22) no Hoare annotation was computed. [2020-09-21 12:36:40,390 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 22) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0))) (let ((.cse0 (<= main_~i~0 .cse1)) (.cse3 (< main_~n~0 (+ main_~k~0 1)))) (or (and (<= main_~n~0 0) (<= 0 main_~i~0) .cse0) (let ((.cse2 (+ main_~i~0 1))) (and (<= .cse1 .cse2) (<= .cse2 .cse1) .cse3)) (and (<= .cse1 main_~i~0) .cse0 .cse3)))) [2020-09-21 12:36:40,390 INFO L264 CegarLoopResult]: At program point L18-4(lines 18 22) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 main_~n~0))) (or (and (<= 0 main_~n~0) (<= main_~n~0 0) (<= main_~i~0 (* 2 main_~n~0)) .cse0) (and .cse0 (< main_~n~0 (+ main_~k~0 1))))) [2020-09-21 12:36:40,391 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 25) no Hoare annotation was computed. [2020-09-21 12:36:40,391 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-21 12:36:40,391 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-21 12:36:40,391 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-21 12:36:40,391 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-21 12:36:40,391 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-21 12:36:40,392 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-21 12:36:40,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:36:40 BoogieIcfgContainer [2020-09-21 12:36:40,416 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:36:40,420 INFO L168 Benchmark]: Toolchain (without parser) took 4683.38 ms. Allocated memory was 140.0 MB in the beginning and 244.3 MB in the end (delta: 104.3 MB). Free memory was 103.2 MB in the beginning and 109.4 MB in the end (delta: -6.3 MB). Peak memory consumption was 98.1 MB. Max. memory is 7.1 GB. [2020-09-21 12:36:40,421 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 12:36:40,422 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.45 ms. Allocated memory is still 140.0 MB. Free memory was 102.7 MB in the beginning and 93.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:36:40,423 INFO L168 Benchmark]: Boogie Preprocessor took 117.44 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.1 MB in the beginning and 182.0 MB in the end (delta: -88.9 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-21 12:36:40,424 INFO L168 Benchmark]: RCFGBuilder took 317.94 ms. Allocated memory is still 202.4 MB. Free memory was 182.0 MB in the beginning and 168.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-21 12:36:40,425 INFO L168 Benchmark]: TraceAbstraction took 3901.17 ms. Allocated memory was 202.4 MB in the beginning and 244.3 MB in the end (delta: 41.9 MB). Free memory was 167.9 MB in the beginning and 109.4 MB in the end (delta: 58.5 MB). Peak memory consumption was 100.4 MB. Max. memory is 7.1 GB. [2020-09-21 12:36:40,429 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 337.45 ms. Allocated memory is still 140.0 MB. Free memory was 102.7 MB in the beginning and 93.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.44 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.1 MB in the beginning and 182.0 MB in the end (delta: -88.9 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 317.94 ms. Allocated memory is still 202.4 MB. Free memory was 182.0 MB in the beginning and 168.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3901.17 ms. Allocated memory was 202.4 MB in the beginning and 244.3 MB in the end (delta: 41.9 MB). Free memory was 167.9 MB in the beginning and 109.4 MB in the end (delta: 58.5 MB). Peak memory consumption was 100.4 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: 18]: Loop Invariant Derived loop invariant: (((n <= 0 && 0 <= i) && i <= 2 * n) || ((2 * n <= i + 1 && i + 1 <= 2 * n) && n < k + 1)) || ((2 * n <= i && i <= 2 * n) && n < k + 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.5s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 84 SDtfs, 30 SDslu, 182 SDs, 0 SdLazy, 239 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=6, 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, 7 MinimizatonAttempts, 12 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 14 PreInvPairs, 22 NumberOfFragments, 79 HoareAnnotationTreeSize, 14 FomulaSimplifications, 124 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 101 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 103 ConstructedInterpolants, 0 QuantifiedInterpolants, 9257 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 13/41 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...