/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 --rcfgbuilder.size.of.a.code.block SequenceOfStatements --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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:52:13,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:52:13,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:52:13,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:52:13,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:52:13,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:52:13,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:52:13,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:52:13,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:52:13,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:52:13,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:52:13,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:52:13,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:52:13,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:52:13,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:52:13,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:52:13,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:52:13,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:52:13,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:52:13,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:52:13,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:52:13,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:52:13,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:52:13,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:52:13,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:52:13,746 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:52:13,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:52:13,748 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:52:13,748 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:52:13,749 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:52:13,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:52:13,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:52:13,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:52:13,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:52:13,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:52:13,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:52:13,756 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:52:13,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:52:13,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:52:13,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:52:13,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:52:13,759 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 [2020-10-14 23:52:13,804 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:52:13,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:52:13,808 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:52:13,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:52:13,808 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:52:13,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:52:13,809 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:52:13,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:52:13,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:52:13,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:52:13,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:52:13,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:52:13,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:52:13,813 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:52:13,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:52:13,814 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:52:13,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:52:13,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:52:13,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:52:13,814 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:52:13,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:52:13,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:52:13,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:52:13,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:52:13,815 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:52:13,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:52:13,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:52:13,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:52:13,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:52:13,818 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.rcfgbuilder: Size of a code block -> SequenceOfStatements 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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:52:14,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:52:14,133 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:52:14,136 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:52:14,138 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:52:14,138 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:52:14,139 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2020-10-14 23:52:14,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2933a083d/537377c2e18045abb43ab883053e62a9/FLAG89f07dbe0 [2020-10-14 23:52:14,615 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:52:14,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/nested6.i [2020-10-14 23:52:14,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2933a083d/537377c2e18045abb43ab883053e62a9/FLAG89f07dbe0 [2020-10-14 23:52:15,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2933a083d/537377c2e18045abb43ab883053e62a9 [2020-10-14 23:52:15,060 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:52:15,062 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:52:15,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:52:15,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:52:15,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:52:15,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:52:15" (1/1) ... [2020-10-14 23:52:15,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4700e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:15, skipping insertion in model container [2020-10-14 23:52:15,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:52:15" (1/1) ... [2020-10-14 23:52:15,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:52:15,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:52:15,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:52:15,323 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:52:15,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:52:15,357 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:52:15,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:15 WrapperNode [2020-10-14 23:52:15,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:52:15,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:52:15,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:52:15,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:52:15,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:15" (1/1) ... [2020-10-14 23:52:15,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:15" (1/1) ... [2020-10-14 23:52:15,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:15" (1/1) ... [2020-10-14 23:52:15,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:15" (1/1) ... [2020-10-14 23:52:15,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:15" (1/1) ... [2020-10-14 23:52:15,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:15" (1/1) ... [2020-10-14 23:52:15,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:15" (1/1) ... [2020-10-14 23:52:15,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:52:15,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:52:15,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:52:15,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:52:15,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:15" (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 [2020-10-14 23:52:15,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:52:15,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:52:15,590 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 23:52:15,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:52:15,591 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:52:15,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:52:15,591 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 23:52:15,592 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 23:52:15,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:52:15,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:52:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:52:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:52:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:52:15,806 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:52:15,806 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 23:52:15,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:52:15 BoogieIcfgContainer [2020-10-14 23:52:15,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:52:15,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:52:15,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:52:15,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:52:15,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:52:15" (1/3) ... [2020-10-14 23:52:15,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3e670f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:52:15, skipping insertion in model container [2020-10-14 23:52:15,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:15" (2/3) ... [2020-10-14 23:52:15,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3e670f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:52:15, skipping insertion in model container [2020-10-14 23:52:15,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:52:15" (3/3) ... [2020-10-14 23:52:15,819 INFO L109 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-10-14 23:52:15,834 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:52:15,849 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:52:15,884 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:52:15,933 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:52:15,933 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:52:15,933 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:52:15,933 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:52:15,934 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:52:15,934 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:52:15,934 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:52:15,936 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:52:15,983 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-14 23:52:15,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 23:52:15,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:16,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:16,002 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:16,017 INFO L82 PathProgramCache]: Analyzing trace with hash 404168940, now seen corresponding path program 1 times [2020-10-14 23:52:16,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:16,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859699515] [2020-10-14 23:52:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:16,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:16,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:16,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 23:52:16,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:16,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-14 23:52:16,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:16,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:16,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:52:16,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:52:16,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:52:16,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:52:16,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:16,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:16,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:16,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:16,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:16,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:52:16,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:16,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:16,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:16,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:16,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:16,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:16,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859699515] [2020-10-14 23:52:16,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:52:16,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 23:52:16,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675489227] [2020-10-14 23:52:16,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:52:16,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:16,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:52:16,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:52:16,429 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-10-14 23:52:16,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:16,580 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2020-10-14 23:52:16,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:52:16,582 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-14 23:52:16,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:16,593 INFO L225 Difference]: With dead ends: 57 [2020-10-14 23:52:16,593 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 23:52:16,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:52:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 23:52:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 23:52:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 23:52:16,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-14 23:52:16,640 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-10-14 23:52:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:16,640 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-14 23:52:16,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:52:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-14 23:52:16,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:52:16,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:16,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:16,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:52:16,644 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:16,644 INFO L82 PathProgramCache]: Analyzing trace with hash -849304486, now seen corresponding path program 1 times [2020-10-14 23:52:16,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:16,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240185904] [2020-10-14 23:52:16,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:16,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:16,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:16,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:52:16,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:16,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-14 23:52:16,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:16,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:16,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:52:16,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:52:16,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:52:16,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:16,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:16,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:16,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:16,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:16,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:16,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:52:16,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:16,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:16,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:16,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:16,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:16,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:16,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240185904] [2020-10-14 23:52:16,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:52:16,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:52:16,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867513814] [2020-10-14 23:52:16,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:52:16,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:16,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:52:16,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:52:16,838 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-10-14 23:52:16,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:16,994 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-10-14 23:52:16,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:52:16,995 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-14 23:52:16,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:16,998 INFO L225 Difference]: With dead ends: 53 [2020-10-14 23:52:16,998 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 23:52:17,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:52:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 23:52:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2020-10-14 23:52:17,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 23:52:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-14 23:52:17,015 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 16 [2020-10-14 23:52:17,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:17,015 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-14 23:52:17,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:52:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-14 23:52:17,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:52:17,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:17,017 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:17,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:52:17,018 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:17,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:17,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1573212483, now seen corresponding path program 1 times [2020-10-14 23:52:17,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:17,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281229963] [2020-10-14 23:52:17,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:17,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:17,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:17,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:52:17,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:17,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-14 23:52:17,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:17,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:17,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:52:17,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:52:17,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:52:17,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:17,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:17,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:17,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:17,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:17,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:17,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:52:17,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:17,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:17,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:17,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:17,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:17,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:17,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-14 23:52:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:17,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:17,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:17,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 23:52:17,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:17,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 23:52:17,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:17,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:17,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:52:17,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:17,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:52:17,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:52:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:17,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281229963] [2020-10-14 23:52:17,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:52:17,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 23:52:17,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159856423] [2020-10-14 23:52:17,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:52:17,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:17,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:52:17,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:52:17,285 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 5 states. [2020-10-14 23:52:17,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:17,362 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-10-14 23:52:17,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:52:17,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-14 23:52:17,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:17,366 INFO L225 Difference]: With dead ends: 51 [2020-10-14 23:52:17,366 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 23:52:17,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:52:17,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 23:52:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-14 23:52:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 23:52:17,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-10-14 23:52:17,379 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 20 [2020-10-14 23:52:17,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:17,379 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-10-14 23:52:17,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:52:17,380 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-10-14 23:52:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:52:17,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:17,381 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:17,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:52:17,381 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:17,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:17,382 INFO L82 PathProgramCache]: Analyzing trace with hash -796180215, now seen corresponding path program 1 times [2020-10-14 23:52:17,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:17,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021081892] [2020-10-14 23:52:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:17,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:17,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:17,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:17,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:17,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:17,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:17,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:52:17,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:52:17,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-14 23:52:17,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:17,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:17,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:52:17,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:52:17,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:52:17,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:17,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:17,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:17,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:17,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:17,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:17,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:17,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:17,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:17,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:17,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:17,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:17,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:17,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021081892] [2020-10-14 23:52:17,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:17,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:52:17,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007390758] [2020-10-14 23:52:17,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:52:17,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:17,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:52:17,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:52:17,961 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 7 states. [2020-10-14 23:52:18,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:18,145 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2020-10-14 23:52:18,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:52:18,145 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-14 23:52:18,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:18,147 INFO L225 Difference]: With dead ends: 72 [2020-10-14 23:52:18,147 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 23:52:18,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:52:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 23:52:18,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2020-10-14 23:52:18,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 23:52:18,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2020-10-14 23:52:18,162 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 20 [2020-10-14 23:52:18,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:18,163 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2020-10-14 23:52:18,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:52:18,163 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2020-10-14 23:52:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:52:18,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:18,165 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:18,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:52:18,165 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:18,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:18,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1513938898, now seen corresponding path program 1 times [2020-10-14 23:52:18,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:18,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249284644] [2020-10-14 23:52:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:18,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:18,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:18,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:18,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:52:18,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:18,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-14 23:52:18,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:18,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:18,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:52:18,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 23:52:18,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:52:18,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:18,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:18,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:18,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:18,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:18,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:18,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:18,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:18,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:18,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:18,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:18,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:18,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:18,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 23:52:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:18,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:18,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:18,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:18,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 23:52:18,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:52:18,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 23:52:18,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:18,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:18,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:52:18,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:18,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:52:18,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:18,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249284644] [2020-10-14 23:52:18,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:52:18,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 23:52:18,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239498295] [2020-10-14 23:52:18,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:52:18,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:18,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:52:18,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:52:18,448 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 7 states. [2020-10-14 23:52:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:18,658 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2020-10-14 23:52:18,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:52:18,660 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-14 23:52:18,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:18,662 INFO L225 Difference]: With dead ends: 78 [2020-10-14 23:52:18,663 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 23:52:18,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:52:18,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 23:52:18,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 43. [2020-10-14 23:52:18,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:52:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-10-14 23:52:18,687 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 23 [2020-10-14 23:52:18,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:18,688 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-10-14 23:52:18,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:52:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-10-14 23:52:18,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:52:18,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:18,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:18,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:52:18,690 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:18,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:18,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1604756500, now seen corresponding path program 1 times [2020-10-14 23:52:18,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:18,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148434756] [2020-10-14 23:52:18,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:18,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:18,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:18,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:18,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:18,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:18,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:18,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:18,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:18,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:19,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:19,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:52:19,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 23:52:19,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-14 23:52:19,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:19,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:19,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:52:19,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:52:19,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:52:19,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:19,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:19,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:19,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:19,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:19,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:19,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:19,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:19,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:19,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:19,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:19,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:19,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:19,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 23:52:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:19,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:19,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:19,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 23:52:19,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:19,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 23:52:19,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:19,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:19,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:52:19,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:19,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:52:19,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:52:19,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148434756] [2020-10-14 23:52:19,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:52:19,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:52:19,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519934546] [2020-10-14 23:52:19,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:52:19,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:19,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:52:19,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:52:19,182 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 6 states. [2020-10-14 23:52:19,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:19,316 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-10-14 23:52:19,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:52:19,316 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-14 23:52:19,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:19,317 INFO L225 Difference]: With dead ends: 57 [2020-10-14 23:52:19,318 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 23:52:19,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:52:19,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 23:52:19,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-14 23:52:19,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 23:52:19,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-14 23:52:19,335 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 24 [2020-10-14 23:52:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:19,336 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-14 23:52:19,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:52:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-14 23:52:19,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:52:19,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:52:19,340 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:52:19,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:52:19,343 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:52:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:52:19,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1598241856, now seen corresponding path program 1 times [2020-10-14 23:52:19,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:52:19,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873752199] [2020-10-14 23:52:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:52:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:19,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:19,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:19,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:19,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:19,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:19,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:20,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:20,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 23:52:20,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:52:20,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 793 [2020-10-14 23:52:20,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:20,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:20,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:52:20,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 23:52:20,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:52:20,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:20,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:52:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:20,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:20,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:20,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:52:20,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:20,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:52:20,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:20,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:20,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:52:20,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:20,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:52:20,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:20,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 23:52:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:20,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:20,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:20,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 23:52:20,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:20,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:52:20,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:20,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:20,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:52:20,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:20,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:52:20,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:20,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 23:52:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:52:20,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:52:20,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:52:20,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 23:52:20,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:52:20,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:52:20,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:52:20,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:52:20,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:52:20,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:52:20,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:52:20,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:52:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:52:20,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873752199] [2020-10-14 23:52:20,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:52:20,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:52:20,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424710225] [2020-10-14 23:52:20,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:52:20,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:52:20,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:52:20,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:52:20,220 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 6 states. [2020-10-14 23:52:20,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:52:20,311 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2020-10-14 23:52:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:52:20,313 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-14 23:52:20,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:52:20,314 INFO L225 Difference]: With dead ends: 55 [2020-10-14 23:52:20,314 INFO L226 Difference]: Without dead ends: 0 [2020-10-14 23:52:20,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:52:20,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-14 23:52:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-14 23:52:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-14 23:52:20,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-14 23:52:20,320 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-10-14 23:52:20,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:52:20,321 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-14 23:52:20,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:52:20,321 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-14 23:52:20,321 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-14 23:52:20,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:52:20,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-14 23:52:20,730 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-14 23:52:20,730 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-14 23:52:20,731 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-14 23:52:20,731 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-14 23:52:20,731 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-14 23:52:20,731 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-14 23:52:20,731 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-10-14 23:52:20,731 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-14 23:52:20,731 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-10-14 23:52:20,732 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-10-14 23:52:20,732 INFO L268 CegarLoopResult]: For program point L31(lines 23 33) no Hoare annotation was computed. [2020-10-14 23:52:20,732 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 37) no Hoare annotation was computed. [2020-10-14 23:52:20,732 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 33) the Hoare annotation is: (and (let ((.cse0 (<= main_~n~0 main_~k~0))) (or (and (<= (+ (* 2 main_~i~0) 1) main_~j~0) .cse0) (and .cse0 (= (* main_~i~0 2) main_~j~0)))) (<= main_~k~0 main_~n~0)) [2020-10-14 23:52:20,732 INFO L268 CegarLoopResult]: For program point L24(lines 24 32) no Hoare annotation was computed. [2020-10-14 23:52:20,733 INFO L264 CegarLoopResult]: At program point L25-2(lines 25 27) the Hoare annotation is: (and (<= (+ main_~j~0 1) main_~n~0) (or (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= (+ .cse0 1) main_~k~0))) (let ((.cse1 (* main_~i~0 2))) (and (= .cse1 main_~k~0) (= .cse1 main_~j~0)))) (<= main_~k~0 main_~n~0)) [2020-10-14 23:52:20,733 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-10-14 23:52:20,733 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 37) no Hoare annotation was computed. [2020-10-14 23:52:20,733 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-14 23:52:20,733 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 37) the Hoare annotation is: true [2020-10-14 23:52:20,734 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-14 23:52:20,734 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (and (<= (+ main_~k~0 1) main_~n~0) (<= (+ main_~j~0 1) main_~n~0) (or (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= (+ .cse0 1) main_~k~0))) (let ((.cse1 (* main_~i~0 2))) (and (= .cse1 main_~k~0) (= .cse1 main_~j~0))))) [2020-10-14 23:52:20,734 INFO L268 CegarLoopResult]: For program point L26-1(lines 25 27) no Hoare annotation was computed. [2020-10-14 23:52:20,735 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 34) no Hoare annotation was computed. [2020-10-14 23:52:20,735 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 34) the Hoare annotation is: (and (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-14 23:52:20,735 INFO L268 CegarLoopResult]: For program point L18(lines 18 21) no Hoare annotation was computed. [2020-10-14 23:52:20,736 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 21) no Hoare annotation was computed. [2020-10-14 23:52:20,736 INFO L271 CegarLoopResult]: At program point L35(lines 13 37) the Hoare annotation is: true [2020-10-14 23:52:20,736 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-10-14 23:52:20,736 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-10-14 23:52:20,736 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-14 23:52:20,736 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-14 23:52:20,736 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-10-14 23:52:20,738 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-10-14 23:52:20,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:52:20 BoogieIcfgContainer [2020-10-14 23:52:20,774 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 23:52:20,778 INFO L168 Benchmark]: Toolchain (without parser) took 5714.49 ms. Allocated memory was 145.8 MB in the beginning and 271.6 MB in the end (delta: 125.8 MB). Free memory was 102.4 MB in the beginning and 161.4 MB in the end (delta: -58.9 MB). Peak memory consumption was 66.9 MB. Max. memory is 7.1 GB. [2020-10-14 23:52:20,784 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 119.9 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-14 23:52:20,785 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.94 ms. Allocated memory is still 145.8 MB. Free memory was 102.0 MB in the beginning and 92.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-10-14 23:52:20,786 INFO L168 Benchmark]: Boogie Preprocessor took 166.36 ms. Allocated memory was 145.8 MB in the beginning and 205.0 MB in the end (delta: 59.2 MB). Free memory was 92.4 MB in the beginning and 183.2 MB in the end (delta: -90.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-14 23:52:20,787 INFO L168 Benchmark]: RCFGBuilder took 285.34 ms. Allocated memory is still 205.0 MB. Free memory was 183.2 MB in the beginning and 168.4 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-10-14 23:52:20,788 INFO L168 Benchmark]: TraceAbstraction took 4962.33 ms. Allocated memory was 205.0 MB in the beginning and 271.6 MB in the end (delta: 66.6 MB). Free memory was 167.4 MB in the beginning and 161.4 MB in the end (delta: 6.0 MB). Peak memory consumption was 72.6 MB. Max. memory is 7.1 GB. [2020-10-14 23:52:20,801 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 119.9 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 294.94 ms. Allocated memory is still 145.8 MB. Free memory was 102.0 MB in the beginning and 92.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 166.36 ms. Allocated memory was 145.8 MB in the beginning and 205.0 MB in the end (delta: 59.2 MB). Free memory was 92.4 MB in the beginning and 183.2 MB in the end (delta: -90.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 285.34 ms. Allocated memory is still 205.0 MB. Free memory was 183.2 MB in the beginning and 168.4 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4962.33 ms. Allocated memory was 205.0 MB in the beginning and 271.6 MB in the end (delta: 66.6 MB). Free memory was 167.4 MB in the beginning and 161.4 MB in the end (delta: 6.0 MB). Peak memory consumption was 72.6 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: 25]: Loop Invariant Derived loop invariant: (j + 1 <= n && ((2 * i <= j && 2 * i + 1 <= k) || (i * 2 == k && i * 2 == j))) && k <= n - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: n <= k && k <= n - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((2 * i + 1 <= j && n <= k) || (n <= k && i * 2 == j)) && k <= n - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.3s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 96 SDslu, 573 SDs, 0 SdLazy, 457 SolverSat, 58 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 73 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 21 PreInvPairs, 35 NumberOfFragments, 142 HoareAnnotationTreeSize, 21 FomulaSimplifications, 2109 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 128 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 149 NumberOfCodeBlocks, 149 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 142 ConstructedInterpolants, 0 QuantifiedInterpolants, 6880 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 5 PerfectInterpolantSequences, 22/24 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...