/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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-acceleration/nested_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:14:35,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:14:35,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:14:35,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:14:35,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:14:35,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:14:35,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:14:35,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:14:35,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:14:35,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:14:35,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:14:35,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:14:35,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:14:35,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:14:35,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:14:35,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:14:35,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:14:35,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:14:35,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:14:35,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:14:35,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:14:35,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:14:35,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:14:35,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:14:35,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:14:35,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:14:35,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:14:35,613 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:14:35,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:14:35,614 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:14:35,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:14:35,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:14:35,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:14:35,617 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:14:35,618 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:14:35,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:14:35,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:14:35,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:14:35,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:14:35,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:14:35,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:14:35,622 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 05:14:35,645 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:14:35,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:14:35,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:14:35,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:14:35,647 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:14:35,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:14:35,647 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:14:35,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:14:35,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:14:35,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:14:35,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:14:35,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:14:35,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:14:35,649 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:14:35,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:14:35,649 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:14:35,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:14:35,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:14:35,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:14:35,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:14:35,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:14:35,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:14:35,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:14:35,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:14:35,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:14:35,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:14:35,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:14:35,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:14:35,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:14:35,652 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:14:35,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:14:35,973 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:14:35,977 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:14:35,980 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:14:35,981 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:14:35,981 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2020-10-14 05:14:36,062 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe53fdf1e/dbecbf908a3d4ab0a8deb9f144140db3/FLAG2e9e38bd8 [2020-10-14 05:14:36,554 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:14:36,562 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2020-10-14 05:14:36,568 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe53fdf1e/dbecbf908a3d4ab0a8deb9f144140db3/FLAG2e9e38bd8 [2020-10-14 05:14:36,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe53fdf1e/dbecbf908a3d4ab0a8deb9f144140db3 [2020-10-14 05:14:36,960 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:14:36,963 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:14:36,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:14:36,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:14:36,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:14:36,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:14:36" (1/1) ... [2020-10-14 05:14:36,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@709958c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:14:36, skipping insertion in model container [2020-10-14 05:14:36,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:14:36" (1/1) ... [2020-10-14 05:14:36,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:14:36,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:14:37,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:14:37,171 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:14:37,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:14:37,198 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:14:37,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:14:37 WrapperNode [2020-10-14 05:14:37,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:14:37,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:14:37,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:14:37,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:14:37,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:14:37" (1/1) ... [2020-10-14 05:14:37,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:14:37" (1/1) ... [2020-10-14 05:14:37,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:14:37" (1/1) ... [2020-10-14 05:14:37,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:14:37" (1/1) ... [2020-10-14 05:14:37,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:14:37" (1/1) ... [2020-10-14 05:14:37,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:14:37" (1/1) ... [2020-10-14 05:14:37,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:14:37" (1/1) ... [2020-10-14 05:14:37,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:14:37,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:14:37,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:14:37,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:14:37,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:14:37" (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 05:14:37,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:14:37,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:14:37,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:14:37,377 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:14:37,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:14:37,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:14:37,378 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:14:37,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:14:37,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:14:37,566 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:14:37,566 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 05:14:37,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:14:37 BoogieIcfgContainer [2020-10-14 05:14:37,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:14:37,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:14:37,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:14:37,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:14:37,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:14:36" (1/3) ... [2020-10-14 05:14:37,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc57748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:14:37, skipping insertion in model container [2020-10-14 05:14:37,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:14:37" (2/3) ... [2020-10-14 05:14:37,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc57748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:14:37, skipping insertion in model container [2020-10-14 05:14:37,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:14:37" (3/3) ... [2020-10-14 05:14:37,579 INFO L109 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2020-10-14 05:14:37,590 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:14:37,597 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:14:37,610 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:14:37,630 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:14:37,631 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:14:37,631 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:14:37,631 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:14:37,631 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:14:37,631 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:14:37,632 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:14:37,632 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:14:37,651 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-14 05:14:37,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:14:37,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:37,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:37,658 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:37,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:37,665 INFO L82 PathProgramCache]: Analyzing trace with hash -873786703, now seen corresponding path program 1 times [2020-10-14 05:14:37,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:37,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170048327] [2020-10-14 05:14:37,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:37,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:37,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:37,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:14:37,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:37,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-14 05:14:37,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:37,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:37,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:14:37,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:37,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:14:37,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:14:38,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:38,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:38,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:38,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:38,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:38,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:14:38,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:38,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:38,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:38,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:38,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:38,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:38,017 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 05:14:38,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170048327] [2020-10-14 05:14:38,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:14:38,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:14:38,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610853002] [2020-10-14 05:14:38,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:14:38,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:38,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:14:38,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:14:38,058 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-10-14 05:14:38,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:38,115 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2020-10-14 05:14:38,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:14:38,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-14 05:14:38,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:38,128 INFO L225 Difference]: With dead ends: 36 [2020-10-14 05:14:38,129 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:14:38,133 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 [2020-10-14 05:14:38,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:14:38,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-10-14 05:14:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 05:14:38,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-14 05:14:38,177 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-14 05:14:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:38,178 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-14 05:14:38,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:14:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-14 05:14:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 05:14:38,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:38,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:38,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:14:38,180 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:38,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:38,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1621360120, now seen corresponding path program 1 times [2020-10-14 05:14:38,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:38,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133987130] [2020-10-14 05:14:38,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:38,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:38,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:38,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:38,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:38,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:38,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 05:14:38,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:14:38,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 487 [2020-10-14 05:14:38,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:38,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:38,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:14:38,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:14:38,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:14:38,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:14:38,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:38,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:38,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:38,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:38,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:38,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:14:38,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:38,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:38,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:38,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:38,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:38,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:38,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133987130] [2020-10-14 05:14:38,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:14:38,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:14:38,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907190742] [2020-10-14 05:14:38,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:14:38,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:38,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:14:38,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:14:38,739 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-10-14 05:14:38,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:38,756 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-10-14 05:14:38,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:14:38,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-14 05:14:38,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:38,758 INFO L225 Difference]: With dead ends: 23 [2020-10-14 05:14:38,759 INFO L226 Difference]: Without dead ends: 15 [2020-10-14 05:14:38,760 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 [2020-10-14 05:14:38,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-14 05:14:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-14 05:14:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 05:14:38,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-14 05:14:38,765 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-10-14 05:14:38,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:38,766 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-14 05:14:38,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:14:38,766 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-14 05:14:38,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:14:38,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:38,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:38,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:14:38,768 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:38,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:38,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1574756514, now seen corresponding path program 1 times [2020-10-14 05:14:38,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:38,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539983388] [2020-10-14 05:14:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:38,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:38,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:38,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:39,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:39,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:39,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:14:39,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:14:39,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 491 [2020-10-14 05:14:39,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:39,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:39,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:14:39,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:39,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:14:39,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:39,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:39,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:39,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:39,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:39,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:39,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:14:39,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:39,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:39,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:39,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:39,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:39,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:14:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:14:39,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539983388] [2020-10-14 05:14:39,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:39,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:14:39,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82543852] [2020-10-14 05:14:39,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:14:39,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:39,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:14:39,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:14:39,365 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-14 05:14:39,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:39,407 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-14 05:14:39,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:14:39,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-14 05:14:39,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:39,410 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:14:39,410 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:14:39,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:14:39,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:14:39,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-10-14 05:14:39,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 05:14:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-14 05:14:39,424 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2020-10-14 05:14:39,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:39,424 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-14 05:14:39,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:14:39,425 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-14 05:14:39,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:14:39,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:39,428 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:39,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:14:39,429 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:39,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:39,429 INFO L82 PathProgramCache]: Analyzing trace with hash -446411245, now seen corresponding path program 2 times [2020-10-14 05:14:39,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:39,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148456111] [2020-10-14 05:14:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:39,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:39,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:39,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:39,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:40,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:40,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:14:40,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:14:40,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 903 [2020-10-14 05:14:40,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:40,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:40,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:14:40,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:40,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:14:40,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:14:40,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:40,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:40,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:40,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:40,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:40,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:14:40,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:40,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:40,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:40,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:40,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:40,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 05:14:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:14:40,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148456111] [2020-10-14 05:14:40,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:40,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:14:40,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007738049] [2020-10-14 05:14:40,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:14:40,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:40,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:14:40,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:14:40,451 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-10-14 05:14:40,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:40,525 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-10-14 05:14:40,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:14:40,527 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-14 05:14:40,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:40,528 INFO L225 Difference]: With dead ends: 31 [2020-10-14 05:14:40,528 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 05:14:40,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:14:40,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 05:14:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-14 05:14:40,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 05:14:40,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-14 05:14:40,547 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2020-10-14 05:14:40,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:40,547 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-14 05:14:40,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:14:40,547 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-14 05:14:40,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:14:40,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:40,549 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:40,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:14:40,549 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:40,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:40,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1470470916, now seen corresponding path program 3 times [2020-10-14 05:14:40,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:40,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426192590] [2020-10-14 05:14:40,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:40,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:40,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:40,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:40,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:40,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:41,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:41,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:44,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:44,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:14:44,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:14:44,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3784 [2020-10-14 05:14:44,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:44,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:44,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:14:44,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 05:14:44,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 05:14:44,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:44,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:44,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:44,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:44,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:44,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:44,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:44,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:44,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:44,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:44,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:44,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:44,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 05:14:44,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426192590] [2020-10-14 05:14:44,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:44,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:14:44,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829788587] [2020-10-14 05:14:44,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:14:44,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:44,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:14:44,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:14:44,397 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2020-10-14 05:14:44,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:44,417 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-10-14 05:14:44,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:14:44,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-14 05:14:44,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:44,419 INFO L225 Difference]: With dead ends: 41 [2020-10-14 05:14:44,419 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 05:14:44,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:14:44,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 05:14:44,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-14 05:14:44,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 05:14:44,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-14 05:14:44,427 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 22 [2020-10-14 05:14:44,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:44,427 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-14 05:14:44,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:14:44,428 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-14 05:14:44,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:14:44,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:44,429 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:44,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:14:44,429 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:44,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:44,430 INFO L82 PathProgramCache]: Analyzing trace with hash -328150312, now seen corresponding path program 4 times [2020-10-14 05:14:44,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:44,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679182825] [2020-10-14 05:14:44,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:44,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:44,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:44,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:44,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:46,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:47,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:49,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:49,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:14:49,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:14:49,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:14:49,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:49,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:49,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:14:49,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:49,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:14:49,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 05:14:49,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:49,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:49,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:49,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:49,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:49,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:49,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:49,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:49,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:49,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:49,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:49,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:14:49,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679182825] [2020-10-14 05:14:49,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:49,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:14:49,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143418637] [2020-10-14 05:14:49,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:14:49,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:49,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:14:49,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:14:49,590 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 6 states. [2020-10-14 05:14:49,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:49,662 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-14 05:14:49,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:14:49,667 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-14 05:14:49,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:49,668 INFO L225 Difference]: With dead ends: 40 [2020-10-14 05:14:49,668 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 05:14:49,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:14:49,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 05:14:49,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-10-14 05:14:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 05:14:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-14 05:14:49,682 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 25 [2020-10-14 05:14:49,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:49,682 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-14 05:14:49,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:14:49,682 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-14 05:14:49,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:14:49,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:49,683 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:49,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:14:49,684 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:49,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:49,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1465881457, now seen corresponding path program 5 times [2020-10-14 05:14:49,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:49,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001935896] [2020-10-14 05:14:49,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:49,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:49,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:49,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:49,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:49,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:54,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:54,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:14:54,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:14:54,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 05:14:54,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:54,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:54,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:14:54,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:14:54,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:14:54,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:54,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:54,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:54,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:54,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:54,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:54,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:54,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:54,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:54,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:54,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:54,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:54,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-14 05:14:54,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001935896] [2020-10-14 05:14:54,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:54,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:14:54,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687373312] [2020-10-14 05:14:54,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:14:54,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:54,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:14:54,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:14:54,784 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 5 states. [2020-10-14 05:14:54,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:54,819 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2020-10-14 05:14:54,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:14:54,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-14 05:14:54,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:54,821 INFO L225 Difference]: With dead ends: 57 [2020-10-14 05:14:54,821 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 05:14:54,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:14:54,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 05:14:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-14 05:14:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 05:14:54,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-14 05:14:54,830 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 30 [2020-10-14 05:14:54,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:54,831 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-14 05:14:54,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:14:54,833 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-14 05:14:54,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:14:54,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:54,834 INFO L422 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:54,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:14:54,834 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:54,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:54,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2020581621, now seen corresponding path program 6 times [2020-10-14 05:14:54,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:54,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479890078] [2020-10-14 05:14:54,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:54,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:54,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:54,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:54,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:55,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:59,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:59,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:14:59,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:14:59,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:14:59,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:59,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:59,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:14:59,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:59,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:14:59,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:59,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:59,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:59,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:59,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:59,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:59,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:59,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:59,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:59,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:59,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:59,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:59,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-14 05:14:59,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479890078] [2020-10-14 05:14:59,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:59,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:14:59,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740921538] [2020-10-14 05:14:59,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:14:59,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:59,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:14:59,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:14:59,944 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 7 states. [2020-10-14 05:14:59,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:59,998 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-10-14 05:14:59,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:14:59,999 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-14 05:14:59,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:00,000 INFO L225 Difference]: With dead ends: 51 [2020-10-14 05:15:00,000 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 05:15:00,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:15:00,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 05:15:00,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-14 05:15:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:15:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-14 05:15:00,009 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 34 [2020-10-14 05:15:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:00,010 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-14 05:15:00,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:15:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-14 05:15:00,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:15:00,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:00,011 INFO L422 BasicCegarLoop]: trace histogram [15, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:00,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:15:00,012 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:00,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:00,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1781203290, now seen corresponding path program 7 times [2020-10-14 05:15:00,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:00,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716167498] [2020-10-14 05:15:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:00,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:00,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:00,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:00,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:00,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:04,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:05,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:05,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:15:05,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:15:05,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:15:05,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:05,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:05,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:15:05,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:05,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:15:05,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:05,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:05,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:05,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:05,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:05,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:05,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:05,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:05,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:05,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:05,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:05,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:05,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 05:15:05,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716167498] [2020-10-14 05:15:05,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:05,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:15:05,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803177488] [2020-10-14 05:15:05,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:15:05,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:05,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:15:05,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:15:05,135 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 8 states. [2020-10-14 05:15:05,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:05,201 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-14 05:15:05,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:15:05,202 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-10-14 05:15:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:05,203 INFO L225 Difference]: With dead ends: 57 [2020-10-14 05:15:05,203 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 05:15:05,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:15:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 05:15:05,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-10-14 05:15:05,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 05:15:05,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-14 05:15:05,212 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 40 [2020-10-14 05:15:05,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:05,212 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-14 05:15:05,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:15:05,213 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-14 05:15:05,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:15:05,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:05,214 INFO L422 BasicCegarLoop]: trace histogram [18, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:05,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:15:05,215 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:05,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:05,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1976593513, now seen corresponding path program 8 times [2020-10-14 05:15:05,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:05,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608351960] [2020-10-14 05:15:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:05,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:05,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:05,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:05,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:05,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:08,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:08,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:10,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:10,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:15:10,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 05:15:10,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:15:10,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:10,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:10,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:15:10,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 05:15:10,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:15:10,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:10,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:10,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:10,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:10,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:10,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:10,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:15:10,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:10,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:10,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:10,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:10,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 197 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-10-14 05:15:10,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608351960] [2020-10-14 05:15:10,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:10,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:15:10,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929323056] [2020-10-14 05:15:10,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:15:10,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:10,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:15:10,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:15:10,317 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 6 states. [2020-10-14 05:15:10,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:10,349 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-10-14 05:15:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:15:10,350 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-14 05:15:10,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:10,350 INFO L225 Difference]: With dead ends: 90 [2020-10-14 05:15:10,351 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 05:15:10,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:15:10,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 05:15:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-14 05:15:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 05:15:10,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-14 05:15:10,360 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 46 [2020-10-14 05:15:10,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:10,360 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-14 05:15:10,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:15:10,361 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-14 05:15:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:15:10,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:10,362 INFO L422 BasicCegarLoop]: trace histogram [24, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:10,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:15:10,362 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:10,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:10,363 INFO L82 PathProgramCache]: Analyzing trace with hash 824783121, now seen corresponding path program 9 times [2020-10-14 05:15:10,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:10,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758534481] [2020-10-14 05:15:10,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:10,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:10,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:10,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:10,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:10,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:15,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:15,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 05:15:15,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:15:15,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:15:15,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:15,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:15,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:15:15,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:15:15,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:15:15,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:15,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:15,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:15,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:15,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:15,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:15,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:15,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:15,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:15,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:15,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:15,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:15,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 131 proven. 10 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-14 05:15:15,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758534481] [2020-10-14 05:15:15,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:15,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:15:15,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775519434] [2020-10-14 05:15:15,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:15:15,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:15,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:15:15,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:15:15,465 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 7 states. [2020-10-14 05:15:15,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:15,499 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-10-14 05:15:15,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:15:15,500 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-14 05:15:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:15,501 INFO L225 Difference]: With dead ends: 101 [2020-10-14 05:15:15,501 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 05:15:15,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:15:15,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 05:15:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-14 05:15:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 05:15:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-10-14 05:15:15,514 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 52 [2020-10-14 05:15:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:15,514 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-10-14 05:15:15,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:15:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-10-14 05:15:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:15:15,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:15,518 INFO L422 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:15,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:15:15,518 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:15,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:15,519 INFO L82 PathProgramCache]: Analyzing trace with hash -323381161, now seen corresponding path program 10 times [2020-10-14 05:15:15,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:15,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944948285] [2020-10-14 05:15:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:15,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:15,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:15,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:15,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:15,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:20,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:20,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:15:20,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:15:20,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:15:20,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:20,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:20,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:15:20,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-14 05:15:20,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:15:20,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:20,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:20,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:20,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:20,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:20,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:20,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:15:20,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:20,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:20,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:20,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:20,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:20,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 342 proven. 15 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2020-10-14 05:15:20,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944948285] [2020-10-14 05:15:20,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:20,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:15:20,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149526997] [2020-10-14 05:15:20,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:15:20,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:20,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:15:20,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:15:20,643 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 8 states. [2020-10-14 05:15:20,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:20,713 INFO L93 Difference]: Finished difference Result 112 states and 129 transitions. [2020-10-14 05:15:20,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:15:20,716 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-14 05:15:20,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:20,716 INFO L225 Difference]: With dead ends: 112 [2020-10-14 05:15:20,717 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 05:15:20,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:15:20,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 05:15:20,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-14 05:15:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:15:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-10-14 05:15:20,727 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 58 [2020-10-14 05:15:20,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:20,728 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-10-14 05:15:20,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:15:20,728 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-10-14 05:15:20,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:15:20,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:20,729 INFO L422 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:20,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:15:20,730 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:20,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:20,730 INFO L82 PathProgramCache]: Analyzing trace with hash -849358255, now seen corresponding path program 11 times [2020-10-14 05:15:20,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:20,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922475289] [2020-10-14 05:15:20,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:20,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:20,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:20,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:20,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:21,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:25,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:25,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 05:15:25,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:15:25,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:15:25,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:25,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:25,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:15:25,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-14 05:15:25,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:15:25,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:25,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:25,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:25,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:25,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:25,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:25,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:15:25,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:25,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:25,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:25,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:25,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:25,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 560 proven. 21 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-10-14 05:15:25,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922475289] [2020-10-14 05:15:25,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:25,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:15:25,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873806565] [2020-10-14 05:15:25,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:15:25,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:25,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:15:25,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:15:25,870 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 9 states. [2020-10-14 05:15:25,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:25,947 INFO L93 Difference]: Finished difference Result 123 states and 140 transitions. [2020-10-14 05:15:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:15:25,949 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2020-10-14 05:15:25,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:25,950 INFO L225 Difference]: With dead ends: 123 [2020-10-14 05:15:25,950 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 05:15:25,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:15:25,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 05:15:25,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-14 05:15:25,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 05:15:25,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-10-14 05:15:25,965 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 64 [2020-10-14 05:15:25,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:25,966 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-10-14 05:15:25,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:15:25,966 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-10-14 05:15:25,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 05:15:25,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:25,970 INFO L422 BasicCegarLoop]: trace histogram [42, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:25,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:15:25,970 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:25,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:25,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1703496983, now seen corresponding path program 12 times [2020-10-14 05:15:25,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:25,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906973702] [2020-10-14 05:15:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:25,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:26,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:26,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:26,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:26,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:30,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:30,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 05:15:30,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:15:30,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:15:30,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:30,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:30,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:15:30,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:15:30,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:15:30,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:31,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:31,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:31,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:31,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:31,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:31,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:15:31,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:31,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:31,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 591 proven. 28 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2020-10-14 05:15:31,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906973702] [2020-10-14 05:15:31,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:31,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:15:31,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008934962] [2020-10-14 05:15:31,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:15:31,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:31,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:15:31,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:15:31,125 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 10 states. [2020-10-14 05:15:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:31,195 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2020-10-14 05:15:31,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:15:31,198 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-10-14 05:15:31,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:31,199 INFO L225 Difference]: With dead ends: 134 [2020-10-14 05:15:31,199 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 05:15:31,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:15:31,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 05:15:31,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-14 05:15:31,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 05:15:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2020-10-14 05:15:31,212 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 70 [2020-10-14 05:15:31,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:31,212 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2020-10-14 05:15:31,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:15:31,213 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2020-10-14 05:15:31,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 05:15:31,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:31,214 INFO L422 BasicCegarLoop]: trace histogram [48, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:31,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:15:31,215 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:31,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:31,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1450427281, now seen corresponding path program 13 times [2020-10-14 05:15:31,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:31,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548429548] [2020-10-14 05:15:31,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:31,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:31,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:31,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:31,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:32,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:36,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:36,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 05:15:36,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:15:36,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 05:15:36,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:36,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:36,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:15:36,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:15:36,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:15:36,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:36,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:36,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:36,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:36,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:36,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:36,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:15:36,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:36,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:36,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:36,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:36,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:36,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 411 proven. 36 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2020-10-14 05:15:36,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548429548] [2020-10-14 05:15:36,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:36,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:15:36,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373398429] [2020-10-14 05:15:36,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:15:36,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:36,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:15:36,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:15:36,401 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand 11 states. [2020-10-14 05:15:36,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:36,488 INFO L93 Difference]: Finished difference Result 145 states and 162 transitions. [2020-10-14 05:15:36,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:15:36,489 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-10-14 05:15:36,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:36,490 INFO L225 Difference]: With dead ends: 145 [2020-10-14 05:15:36,490 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 05:15:36,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:15:36,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 05:15:36,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-14 05:15:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 05:15:36,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-10-14 05:15:36,527 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 76 [2020-10-14 05:15:36,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:36,528 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-10-14 05:15:36,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:15:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-10-14 05:15:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 05:15:36,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:36,529 INFO L422 BasicCegarLoop]: trace histogram [54, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:36,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:15:36,530 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:36,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:36,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1497018839, now seen corresponding path program 14 times [2020-10-14 05:15:36,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:36,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396730676] [2020-10-14 05:15:36,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:36,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:36,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:36,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:36,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:36,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:37,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:41,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:41,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 05:15:41,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:15:41,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 05:15:41,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:41,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:41,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:15:41,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 05:15:41,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:15:41,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:41,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:41,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:41,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:41,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:41,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:41,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:41,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:41,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:41,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:41,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:41,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:41,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 915 proven. 45 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-10-14 05:15:41,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396730676] [2020-10-14 05:15:41,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:41,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:15:41,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615306939] [2020-10-14 05:15:41,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:15:41,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:41,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:15:41,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:15:41,764 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 12 states. [2020-10-14 05:15:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:41,878 INFO L93 Difference]: Finished difference Result 156 states and 173 transitions. [2020-10-14 05:15:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:15:41,879 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-10-14 05:15:41,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:41,880 INFO L225 Difference]: With dead ends: 156 [2020-10-14 05:15:41,881 INFO L226 Difference]: Without dead ends: 89 [2020-10-14 05:15:41,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:15:41,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-14 05:15:41,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-14 05:15:41,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 05:15:41,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2020-10-14 05:15:41,894 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 82 [2020-10-14 05:15:41,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:41,895 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2020-10-14 05:15:41,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:15:41,895 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2020-10-14 05:15:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 05:15:41,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:41,897 INFO L422 BasicCegarLoop]: trace histogram [60, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:41,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:15:41,897 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:41,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:41,897 INFO L82 PathProgramCache]: Analyzing trace with hash 642319569, now seen corresponding path program 15 times [2020-10-14 05:15:41,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:41,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450657992] [2020-10-14 05:15:41,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:41,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:42,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:43,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:43,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 05:15:43,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:43,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1344 [2020-10-14 05:15:43,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:43,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:43,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:15:43,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:43,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-14 05:15:43,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:43,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:43,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:43,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:43,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:43,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:43,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:15:43,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:43,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:43,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:43,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:43,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:43,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-14 05:15:43,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450657992] [2020-10-14 05:15:43,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:43,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:15:43,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399445704] [2020-10-14 05:15:43,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:15:43,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:43,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:15:43,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:15:43,408 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 9 states. [2020-10-14 05:15:43,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:43,494 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2020-10-14 05:15:43,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:15:43,495 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-14 05:15:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:43,496 INFO L225 Difference]: With dead ends: 119 [2020-10-14 05:15:43,497 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 05:15:43,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:15:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 05:15:43,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 102. [2020-10-14 05:15:43,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 05:15:43,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2020-10-14 05:15:43,510 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 88 [2020-10-14 05:15:43,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:43,511 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2020-10-14 05:15:43,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:15:43,511 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2020-10-14 05:15:43,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-14 05:15:43,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:43,512 INFO L422 BasicCegarLoop]: trace histogram [70, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:43,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:15:43,513 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:43,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:43,513 INFO L82 PathProgramCache]: Analyzing trace with hash -284489192, now seen corresponding path program 16 times [2020-10-14 05:15:43,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:43,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708517488] [2020-10-14 05:15:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:43,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:43,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:44,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:45,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:45,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-14 05:15:45,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:15:45,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1625 [2020-10-14 05:15:45,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:45,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:45,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:15:45,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-14 05:15:45,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:15:45,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:45,522 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 22 [2020-10-14 05:15:45,782 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 13 [2020-10-14 05:15:45,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:45,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:45,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:45,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:45,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:45,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:15:45,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:45,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:45,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:45,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:45,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:45,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 739 proven. 0 refuted. 0 times theorem prover too weak. 2236 trivial. 0 not checked. [2020-10-14 05:15:45,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708517488] [2020-10-14 05:15:45,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:15:45,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 05:15:45,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743540650] [2020-10-14 05:15:45,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:15:45,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:45,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:15:45,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:15:45,817 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand 7 states. [2020-10-14 05:15:47,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:47,941 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2020-10-14 05:15:47,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:15:47,941 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 101 [2020-10-14 05:15:47,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:47,942 INFO L225 Difference]: With dead ends: 102 [2020-10-14 05:15:47,942 INFO L226 Difference]: Without dead ends: 0 [2020-10-14 05:15:47,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:15:47,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-14 05:15:47,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-14 05:15:47,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-14 05:15:47,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-14 05:15:47,943 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 101 [2020-10-14 05:15:47,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:47,944 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-14 05:15:47,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:15:47,944 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-14 05:15:47,945 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-14 05:15:47,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:15:47,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-14 05:15:48,174 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 7 [2020-10-14 05:15:48,218 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-14 05:15:48,218 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-14 05:15:48,218 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-14 05:15:48,218 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-14 05:15:48,219 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-14 05:15:48,219 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-14 05:15:48,219 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 25) no Hoare annotation was computed. [2020-10-14 05:15:48,219 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 19) the Hoare annotation is: (<= main_~x~0 (+ (* 4294967296 (div main_~x~0 4294967296)) 268435454)) [2020-10-14 05:15:48,219 INFO L268 CegarLoopResult]: For program point L17-3(lines 17 19) no Hoare annotation was computed. [2020-10-14 05:15:48,219 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 25) no Hoare annotation was computed. [2020-10-14 05:15:48,220 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 25) the Hoare annotation is: true [2020-10-14 05:15:48,220 INFO L264 CegarLoopResult]: At program point L14-2(lines 14 22) the Hoare annotation is: (let ((.cse0 (div main_~x~0 2))) (let ((.cse1 (div (+ (* .cse0 (- 2)) main_~x~0) 4294967296))) (or (not (= main_~x~0 (+ (* .cse0 2) (* .cse1 4294967296)))) (< (+ .cse0 (* 2147483648 .cse1)) (+ (* 2147483648 (div main_~x~0 4294967296)) 134217728))))) [2020-10-14 05:15:48,220 INFO L264 CegarLoopResult]: At program point L14-3(lines 14 22) the Hoare annotation is: (not (= main_~x~0 (let ((.cse0 (div main_~x~0 2))) (+ (* 2 .cse0) (* 4294967296 (div (+ (* .cse0 (- 2)) main_~x~0) 4294967296)))))) [2020-10-14 05:15:48,220 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-10-14 05:15:48,221 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-10-14 05:15:48,221 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-10-14 05:15:48,221 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-10-14 05:15:48,221 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-14 05:15:48,222 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-10-14 05:15:48,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 05:15:48 BoogieIcfgContainer [2020-10-14 05:15:48,257 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 05:15:48,260 INFO L168 Benchmark]: Toolchain (without parser) took 71297.07 ms. Allocated memory was 147.3 MB in the beginning and 973.1 MB in the end (delta: 825.8 MB). Free memory was 104.0 MB in the beginning and 580.9 MB in the end (delta: -476.9 MB). Peak memory consumption was 348.8 MB. Max. memory is 7.1 GB. [2020-10-14 05:15:48,262 INFO L168 Benchmark]: CDTParser took 0.64 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-14 05:15:48,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.90 ms. Allocated memory is still 147.3 MB. Free memory was 103.6 MB in the beginning and 94.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-10-14 05:15:48,265 INFO L168 Benchmark]: Boogie Preprocessor took 121.68 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 94.3 MB in the beginning and 181.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-10-14 05:15:48,268 INFO L168 Benchmark]: RCFGBuilder took 249.38 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 169.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-10-14 05:15:48,269 INFO L168 Benchmark]: TraceAbstraction took 70685.56 ms. Allocated memory was 203.4 MB in the beginning and 973.1 MB in the end (delta: 769.7 MB). Free memory was 169.0 MB in the beginning and 580.9 MB in the end (delta: -412.0 MB). Peak memory consumption was 357.7 MB. Max. memory is 7.1 GB. [2020-10-14 05:15:48,277 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.64 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 234.90 ms. Allocated memory is still 147.3 MB. Free memory was 103.6 MB in the beginning and 94.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.68 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 94.3 MB in the beginning and 181.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 249.38 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 169.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 70685.56 ms. Allocated memory was 203.4 MB in the beginning and 973.1 MB in the end (delta: 769.7 MB). Free memory was 169.0 MB in the beginning and 580.9 MB in the end (delta: -412.0 MB). Peak memory consumption was 357.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 14]: Loop Invariant Derived loop invariant: !(x == x / 2 * 2 + (x / 2 * -2 + x) / 4294967296 * 4294967296) || x / 2 + 2147483648 * ((x / 2 * -2 + x) / 4294967296) < 2147483648 * (x / 4294967296) + 134217728 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: x <= 4294967296 * (x / 4294967296) + 268435454 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 70.3s, OverallIterations: 18, TraceHistogramMax: 70, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 258 SDtfs, 90 SDslu, 773 SDs, 0 SdLazy, 675 SolverSat, 88 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=102occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 34 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 25 PreInvPairs, 111 NumberOfFragments, 78 HoareAnnotationTreeSize, 25 FomulaSimplifications, 5995 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 22 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 66.2s InterpolantComputationTime, 843 NumberOfCodeBlocks, 843 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 825 ConstructedInterpolants, 0 QuantifiedInterpolants, 148211 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 3 PerfectInterpolantSequences, 10096/12454 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...