/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 SingleStatement --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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:18:53,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:18:53,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:18:53,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:18:53,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:18:53,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:18:53,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:18:53,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:18:53,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:18:53,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:18:53,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:18:53,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:18:53,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:18:53,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:18:53,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:18:53,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:18:53,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:18:53,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:18:53,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:18:53,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:18:53,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:18:53,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:18:53,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:18:53,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:18:53,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:18:53,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:18:53,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:18:53,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:18:53,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:18:53,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:18:53,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:18:53,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:18:53,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:18:53,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:18:53,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:18:53,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:18:53,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:18:53,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:18:53,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:18:53,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:18:53,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:18:53,622 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 [2020-09-25 02:18:53,666 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:18:53,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:18:53,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:18:53,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:18:53,670 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:18:53,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:18:53,670 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:18:53,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:18:53,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:18:53,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:18:53,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:18:53,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:18:53,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:18:53,673 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:18:53,673 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:18:53,673 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:18:53,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:18:53,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:18:53,674 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:18:53,674 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:18:53,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:18:53,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:18:53,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:18:53,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:18:53,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:18:53,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:18:53,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:18:53,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:18:53,676 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:18:53,676 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 -> SingleStatement 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=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-09-25 02:18:54,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:18:54,204 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:18:54,209 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:18:54,211 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:18:54,212 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:18:54,213 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-09-25 02:18:54,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3edd6dc80/cda15446c1ac48f2ac03ce2a0e84009e/FLAG7a072c99f [2020-09-25 02:18:54,831 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:18:54,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/lu.cmp.c [2020-09-25 02:18:54,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3edd6dc80/cda15446c1ac48f2ac03ce2a0e84009e/FLAG7a072c99f [2020-09-25 02:18:55,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3edd6dc80/cda15446c1ac48f2ac03ce2a0e84009e [2020-09-25 02:18:55,185 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:18:55,192 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:18:55,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:18:55,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:18:55,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:18:55,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:18:55" (1/1) ... [2020-09-25 02:18:55,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@963cacb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55, skipping insertion in model container [2020-09-25 02:18:55,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:18:55" (1/1) ... [2020-09-25 02:18:55,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:18:55,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:18:55,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:18:55,594 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:18:55,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:18:55,763 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:18:55,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55 WrapperNode [2020-09-25 02:18:55,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:18:55,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:18:55,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:18:55,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:18:55,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (1/1) ... [2020-09-25 02:18:55,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (1/1) ... [2020-09-25 02:18:55,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (1/1) ... [2020-09-25 02:18:55,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (1/1) ... [2020-09-25 02:18:55,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (1/1) ... [2020-09-25 02:18:55,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (1/1) ... [2020-09-25 02:18:55,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (1/1) ... [2020-09-25 02:18:55,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:18:55,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:18:55,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:18:55,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:18:55,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:18:55,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:18:55,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:18:55,903 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 02:18:55,903 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-09-25 02:18:55,904 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:18:55,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-09-25 02:18:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:18:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 02:18:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-09-25 02:18:55,905 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-09-25 02:18:55,905 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:18:55,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-25 02:18:55,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-25 02:18:55,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 02:18:55,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 02:18:55,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:18:55,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:18:56,499 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:18:56,499 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-09-25 02:18:56,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:18:56 BoogieIcfgContainer [2020-09-25 02:18:56,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:18:56,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:18:56,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:18:56,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:18:56,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:18:55" (1/3) ... [2020-09-25 02:18:56,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144c5e36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:18:56, skipping insertion in model container [2020-09-25 02:18:56,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (2/3) ... [2020-09-25 02:18:56,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144c5e36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:18:56, skipping insertion in model container [2020-09-25 02:18:56,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:18:56" (3/3) ... [2020-09-25 02:18:56,524 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-09-25 02:18:56,536 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:18:56,547 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:18:56,570 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:18:56,598 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:18:56,599 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:18:56,599 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:18:56,599 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:18:56,599 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:18:56,599 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:18:56,599 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:18:56,600 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:18:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states. [2020-09-25 02:18:56,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-25 02:18:56,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:18:56,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:18:56,635 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:18:56,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:18:56,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1445504148, now seen corresponding path program 1 times [2020-09-25 02:18:56,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:18:56,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700701285] [2020-09-25 02:18:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:18:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:56,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:56,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:57,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:57,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:57,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:57,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:57,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 02:18:57,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 02:18:57,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1045 [2020-09-25 02:18:57,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:57,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:18:57,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 02:18:57,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 02:18:57,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 02:18:58,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:18:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:58,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:58,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:58,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 02:18:58,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:18:58,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 02:18:58,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:58,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:58,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:18:58,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:58,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:18:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:18:58,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700701285] [2020-09-25 02:18:58,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:18:58,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 02:18:58,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834671885] [2020-09-25 02:18:58,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 02:18:58,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:18:58,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 02:18:58,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:18:58,088 INFO L87 Difference]: Start difference. First operand 186 states. Second operand 6 states. [2020-09-25 02:18:58,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:18:58,860 INFO L93 Difference]: Finished difference Result 373 states and 442 transitions. [2020-09-25 02:18:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 02:18:58,863 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-09-25 02:18:58,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:18:58,875 INFO L225 Difference]: With dead ends: 373 [2020-09-25 02:18:58,876 INFO L226 Difference]: Without dead ends: 70 [2020-09-25 02:18:58,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:18:58,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-25 02:18:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 49. [2020-09-25 02:18:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-25 02:18:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-09-25 02:18:58,943 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 30 [2020-09-25 02:18:58,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:18:58,943 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-09-25 02:18:58,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 02:18:58,944 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-09-25 02:18:58,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-25 02:18:58,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:18:58,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:18:58,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:18:58,946 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:18:58,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:18:58,947 INFO L82 PathProgramCache]: Analyzing trace with hash -905808642, now seen corresponding path program 1 times [2020-09-25 02:18:58,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:18:58,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885995546] [2020-09-25 02:18:58,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:18:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:58,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:59,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:59,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:59,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:59,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:00,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:00,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-25 02:19:00,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 02:19:00,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1053 [2020-09-25 02:19:00,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:00,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:19:00,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 02:19:00,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 02:19:00,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:00,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:00,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:00,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:00,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 02:19:00,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:00,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 02:19:00,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:00,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:00,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:00,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:00,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:00,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885995546] [2020-09-25 02:19:00,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:00,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:19:00,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939617108] [2020-09-25 02:19:00,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:19:00,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:00,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:19:00,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:19:00,166 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 5 states. [2020-09-25 02:19:00,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:00,410 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-09-25 02:19:00,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 02:19:00,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-09-25 02:19:00,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:00,412 INFO L225 Difference]: With dead ends: 108 [2020-09-25 02:19:00,413 INFO L226 Difference]: Without dead ends: 81 [2020-09-25 02:19:00,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:19:00,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-25 02:19:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 55. [2020-09-25 02:19:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-25 02:19:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-09-25 02:19:00,426 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 39 [2020-09-25 02:19:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:00,427 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-09-25 02:19:00,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:19:00,427 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-09-25 02:19:00,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 02:19:00,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:00,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:00,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:19:00,430 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:00,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:00,430 INFO L82 PathProgramCache]: Analyzing trace with hash -361483259, now seen corresponding path program 1 times [2020-09-25 02:19:00,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:00,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274605471] [2020-09-25 02:19:00,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:00,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:00,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:00,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:00,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:01,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:01,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:01,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:02,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:02,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-25 02:19:02,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 02:19:02,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1782 [2020-09-25 02:19:02,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:02,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 02:19:02,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 02:19:02,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 02:19:02,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:02,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:02,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:02,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:02,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 02:19:02,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:02,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 02:19:02,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:02,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:02,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:02,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:02,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:02,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274605471] [2020-09-25 02:19:02,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:02,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 02:19:02,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314586316] [2020-09-25 02:19:02,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 02:19:02,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:02,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 02:19:02,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 02:19:02,367 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 7 states. [2020-09-25 02:19:02,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:02,721 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-09-25 02:19:02,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 02:19:02,722 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-09-25 02:19:02,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:02,723 INFO L225 Difference]: With dead ends: 92 [2020-09-25 02:19:02,724 INFO L226 Difference]: Without dead ends: 90 [2020-09-25 02:19:02,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-09-25 02:19:02,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-25 02:19:02,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 74. [2020-09-25 02:19:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-25 02:19:02,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2020-09-25 02:19:02,735 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 42 [2020-09-25 02:19:02,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:02,735 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2020-09-25 02:19:02,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 02:19:02,735 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2020-09-25 02:19:02,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-25 02:19:02,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:02,738 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:02,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:19:02,738 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:02,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:02,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1960696442, now seen corresponding path program 1 times [2020-09-25 02:19:02,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:02,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482314405] [2020-09-25 02:19:02,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:02,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:02,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:02,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:03,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:03,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:03,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:03,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:04,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:04,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:04,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:05,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:05,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:05,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:05,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:05,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:05,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:06,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:06,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:06,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:07,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 02:19:07,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-09-25 02:19:07,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 02:19:07,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:07,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:19:07,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-09-25 02:19:07,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 02:19:07,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-25 02:19:07,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:07,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:07,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 02:19:07,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:07,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 02:19:07,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:07,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:07,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:07,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:07,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:07,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-25 02:19:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:07,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:07,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 02:19:07,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:07,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 02:19:07,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:07,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:07,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:07,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:07,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 02:19:07,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482314405] [2020-09-25 02:19:07,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:07,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 02:19:07,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807685678] [2020-09-25 02:19:07,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 02:19:07,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:07,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 02:19:07,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-25 02:19:07,978 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand 10 states. [2020-09-25 02:19:08,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:08,567 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2020-09-25 02:19:08,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 02:19:08,568 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-09-25 02:19:08,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:08,574 INFO L225 Difference]: With dead ends: 138 [2020-09-25 02:19:08,575 INFO L226 Difference]: Without dead ends: 136 [2020-09-25 02:19:08,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-09-25 02:19:08,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-25 02:19:08,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 81. [2020-09-25 02:19:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-25 02:19:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-09-25 02:19:08,597 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 64 [2020-09-25 02:19:08,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:08,598 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-09-25 02:19:08,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 02:19:08,599 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-09-25 02:19:08,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-25 02:19:08,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:08,604 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:08,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:19:08,604 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:08,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:08,604 INFO L82 PathProgramCache]: Analyzing trace with hash 2125490212, now seen corresponding path program 2 times [2020-09-25 02:19:08,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:08,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201444019] [2020-09-25 02:19:08,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:08,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:08,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:08,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:10,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:10,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:10,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:12,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:12,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:12,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:12,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:12,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:13,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:13,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 02:19:13,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 02:19:13,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 02:19:13,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:13,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 02:19:13,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 02:19:13,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 02:19:13,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:13,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:13,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:13,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:13,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 02:19:13,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:13,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 02:19:13,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:13,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:13,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:13,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:13,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:13,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-25 02:19:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:13,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:13,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:13,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 02:19:13,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:13,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 02:19:13,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:13,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:13,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 02:19:13,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:13,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 02:19:13,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201444019] [2020-09-25 02:19:13,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:13,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 02:19:13,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656279341] [2020-09-25 02:19:13,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 02:19:13,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:13,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 02:19:13,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 02:19:13,750 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 7 states. [2020-09-25 02:19:14,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:14,027 INFO L93 Difference]: Finished difference Result 164 states and 179 transitions. [2020-09-25 02:19:14,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 02:19:14,028 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 73 [2020-09-25 02:19:14,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:14,029 INFO L225 Difference]: With dead ends: 164 [2020-09-25 02:19:14,029 INFO L226 Difference]: Without dead ends: 111 [2020-09-25 02:19:14,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:19:14,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-25 02:19:14,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2020-09-25 02:19:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-25 02:19:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2020-09-25 02:19:14,043 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 73 [2020-09-25 02:19:14,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:14,043 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2020-09-25 02:19:14,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 02:19:14,044 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2020-09-25 02:19:14,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-25 02:19:14,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:14,045 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:14,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 02:19:14,045 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:14,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1491522468, now seen corresponding path program 3 times [2020-09-25 02:19:14,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:14,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061015685] [2020-09-25 02:19:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:14,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:14,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:14,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:14,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:16,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:16,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:16,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:16,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:16,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:19,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:19,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-25 02:19:19,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 02:19:19,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 02:19:19,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:19,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:19:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 02:19:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 02:19:19,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:19,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:19,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:19,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:19,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 02:19:19,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:19,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 02:19:19,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:19,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:19,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:19,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:19,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:19,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-25 02:19:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:19,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:19,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:19,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 02:19:19,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:19,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 02:19:19,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:19,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:19,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 02:19:19,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:19,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 02:19:19,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061015685] [2020-09-25 02:19:19,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:19,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 02:19:19,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717043871] [2020-09-25 02:19:19,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 02:19:19,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:19,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 02:19:19,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-25 02:19:19,244 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand 10 states. [2020-09-25 02:19:19,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:19,928 INFO L93 Difference]: Finished difference Result 202 states and 219 transitions. [2020-09-25 02:19:19,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 02:19:19,929 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2020-09-25 02:19:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:19,931 INFO L225 Difference]: With dead ends: 202 [2020-09-25 02:19:19,931 INFO L226 Difference]: Without dead ends: 139 [2020-09-25 02:19:19,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2020-09-25 02:19:19,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-25 02:19:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 109. [2020-09-25 02:19:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-25 02:19:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2020-09-25 02:19:19,943 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 82 [2020-09-25 02:19:19,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:19,943 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2020-09-25 02:19:19,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 02:19:19,943 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2020-09-25 02:19:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-25 02:19:19,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:19,945 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:19,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 02:19:19,945 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:19,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:19,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2108507974, now seen corresponding path program 4 times [2020-09-25 02:19:19,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:19,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369107366] [2020-09-25 02:19:19,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:19,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:20,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:20,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:20,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:23,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:23,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:23,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:23,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:23,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:23,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:24,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:24,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-09-25 02:19:24,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 02:19:24,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 02:19:24,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:24,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 02:19:24,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 02:19:24,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 02:19:24,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:25,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:25,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:25,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:25,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 02:19:25,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:25,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 02:19:25,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:25,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:25,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:25,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-25 02:19:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:25,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:25,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:25,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 02:19:25,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:25,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 02:19:25,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:25,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:25,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 02:19:25,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:25,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 93 proven. 30 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-09-25 02:19:25,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369107366] [2020-09-25 02:19:25,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:25,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 02:19:25,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660508158] [2020-09-25 02:19:25,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 02:19:25,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:25,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 02:19:25,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 02:19:25,139 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand 11 states. [2020-09-25 02:19:25,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:25,622 INFO L93 Difference]: Finished difference Result 291 states and 314 transitions. [2020-09-25 02:19:25,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 02:19:25,623 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 100 [2020-09-25 02:19:25,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:25,625 INFO L225 Difference]: With dead ends: 291 [2020-09-25 02:19:25,625 INFO L226 Difference]: Without dead ends: 210 [2020-09-25 02:19:25,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-09-25 02:19:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-25 02:19:25,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 133. [2020-09-25 02:19:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-25 02:19:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 142 transitions. [2020-09-25 02:19:25,640 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 142 transitions. Word has length 100 [2020-09-25 02:19:25,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:25,641 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 142 transitions. [2020-09-25 02:19:25,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 02:19:25,641 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 142 transitions. [2020-09-25 02:19:25,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-25 02:19:25,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:25,643 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:25,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 02:19:25,643 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:25,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1471539684, now seen corresponding path program 5 times [2020-09-25 02:19:25,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:25,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171421054] [2020-09-25 02:19:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:25,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:25,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:25,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:26,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:26,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:28,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:28,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:28,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:28,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:28,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:30,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:30,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:30,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:30,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-09-25 02:19:30,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-25 02:19:30,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-25 02:19:30,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:30,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 02:19:30,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 02:19:30,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-25 02:19:30,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:30,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:30,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:30,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:30,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 02:19:30,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:30,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 02:19:30,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:30,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:30,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:30,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:30,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:30,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-25 02:19:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:30,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:30,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:30,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 02:19:30,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:30,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:19:30,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:30,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:30,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 02:19:30,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:30,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 158 proven. 58 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-09-25 02:19:30,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171421054] [2020-09-25 02:19:30,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:30,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 02:19:30,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831562641] [2020-09-25 02:19:30,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 02:19:30,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:30,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 02:19:30,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-09-25 02:19:30,943 INFO L87 Difference]: Start difference. First operand 133 states and 142 transitions. Second operand 13 states. [2020-09-25 02:19:31,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:31,585 INFO L93 Difference]: Finished difference Result 339 states and 366 transitions. [2020-09-25 02:19:31,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 02:19:31,586 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 118 [2020-09-25 02:19:31,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:31,588 INFO L225 Difference]: With dead ends: 339 [2020-09-25 02:19:31,588 INFO L226 Difference]: Without dead ends: 234 [2020-09-25 02:19:31,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2020-09-25 02:19:31,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-25 02:19:31,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 157. [2020-09-25 02:19:31,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-25 02:19:31,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 168 transitions. [2020-09-25 02:19:31,618 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 168 transitions. Word has length 118 [2020-09-25 02:19:31,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:31,619 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 168 transitions. [2020-09-25 02:19:31,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 02:19:31,619 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 168 transitions. [2020-09-25 02:19:31,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-25 02:19:31,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:31,622 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:31,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 02:19:31,622 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:31,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:31,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1418950918, now seen corresponding path program 6 times [2020-09-25 02:19:31,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:31,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199047628] [2020-09-25 02:19:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:31,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:31,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:31,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:32,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:34,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:35,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:36,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:36,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-09-25 02:19:36,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 02:19:36,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 02:19:36,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:36,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 02:19:36,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 02:19:36,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-25 02:19:36,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:36,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:36,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:36,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:36,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 02:19:36,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:36,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 02:19:36,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:36,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:36,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:36,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:36,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:36,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-09-25 02:19:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:36,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:36,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:36,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 02:19:36,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:36,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 02:19:36,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:36,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:36,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 02:19:36,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:36,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 241 proven. 95 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-09-25 02:19:36,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199047628] [2020-09-25 02:19:36,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:36,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 02:19:36,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331921213] [2020-09-25 02:19:36,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 02:19:36,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:36,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 02:19:36,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-25 02:19:36,921 INFO L87 Difference]: Start difference. First operand 157 states and 168 transitions. Second operand 16 states. [2020-09-25 02:19:38,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:38,104 INFO L93 Difference]: Finished difference Result 369 states and 402 transitions. [2020-09-25 02:19:38,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-25 02:19:38,105 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 136 [2020-09-25 02:19:38,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:38,107 INFO L225 Difference]: With dead ends: 369 [2020-09-25 02:19:38,108 INFO L226 Difference]: Without dead ends: 240 [2020-09-25 02:19:38,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=664, Invalid=1786, Unknown=0, NotChecked=0, Total=2450 [2020-09-25 02:19:38,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-25 02:19:38,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 172. [2020-09-25 02:19:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-25 02:19:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 185 transitions. [2020-09-25 02:19:38,143 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 185 transitions. Word has length 136 [2020-09-25 02:19:38,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:38,144 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 185 transitions. [2020-09-25 02:19:38,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 02:19:38,145 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 185 transitions. [2020-09-25 02:19:38,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-09-25 02:19:38,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:38,150 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 11, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:38,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 02:19:38,151 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:38,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:38,151 INFO L82 PathProgramCache]: Analyzing trace with hash -864292828, now seen corresponding path program 7 times [2020-09-25 02:19:38,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:38,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199119510] [2020-09-25 02:19:38,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:38,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:38,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:38,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:39,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:39,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:40,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:41,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:41,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:41,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:42,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:42,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:42,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:42,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:42,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:42,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:43,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:43,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:43,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-09-25 02:19:43,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-09-25 02:19:43,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 02:19:43,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:43,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:19:43,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 02:19:43,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-09-25 02:19:43,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:43,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:43,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:43,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:43,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 02:19:43,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:43,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 02:19:43,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:43,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:43,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:43,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:43,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:43,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-25 02:19:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:43,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:43,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:43,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 02:19:43,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:43,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:19:43,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:43,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:19:43,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:43,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 02:19:43,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 328 proven. 90 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2020-09-25 02:19:43,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199119510] [2020-09-25 02:19:43,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:43,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 02:19:43,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866141799] [2020-09-25 02:19:43,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 02:19:43,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:43,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 02:19:43,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-25 02:19:43,396 INFO L87 Difference]: Start difference. First operand 172 states and 185 transitions. Second operand 10 states. [2020-09-25 02:19:43,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:43,884 INFO L93 Difference]: Finished difference Result 442 states and 476 transitions. [2020-09-25 02:19:43,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 02:19:43,885 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 154 [2020-09-25 02:19:43,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:43,888 INFO L225 Difference]: With dead ends: 442 [2020-09-25 02:19:43,888 INFO L226 Difference]: Without dead ends: 298 [2020-09-25 02:19:43,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-25 02:19:43,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-09-25 02:19:43,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 191. [2020-09-25 02:19:43,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-09-25 02:19:43,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 204 transitions. [2020-09-25 02:19:43,900 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 204 transitions. Word has length 154 [2020-09-25 02:19:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:43,901 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 204 transitions. [2020-09-25 02:19:43,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 02:19:43,901 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 204 transitions. [2020-09-25 02:19:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-25 02:19:43,903 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:43,903 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:43,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 02:19:43,905 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:43,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:43,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1930934625, now seen corresponding path program 8 times [2020-09-25 02:19:43,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:43,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471504514] [2020-09-25 02:19:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:43,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:44,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:44,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:44,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:44,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:44,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking...