/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/discover_list.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:55:18,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:55:18,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:55:18,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:55:18,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:55:18,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:55:18,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:55:18,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:55:18,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:55:18,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:55:18,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:55:18,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:55:18,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:55:18,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:55:18,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:55:18,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:55:18,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:55:18,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:55:18,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:55:18,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:55:18,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:55:18,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:55:18,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:55:18,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:55:18,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:55:18,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:55:18,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:55:18,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:55:18,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:55:18,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:55:18,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:55:18,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:55:18,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:55:18,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:55:18,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:55:18,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:55:18,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:55:18,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:55:18,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:55:18,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:55:18,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:55:18,464 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:55:18,505 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:55:18,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:55:18,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:55:18,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:55:18,507 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:55:18,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:55:18,508 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:55:18,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:55:18,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:55:18,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:55:18,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:55:18,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:55:18,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:55:18,510 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:55:18,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:55:18,511 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:55:18,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:55:18,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:55:18,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:55:18,511 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:55:18,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:55:18,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:55:18,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:55:18,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:55:18,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:55:18,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:55:18,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:55:18,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:55:18,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:55:18,513 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:55:18,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:55:18,846 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:55:18,849 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:55:18,851 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:55:18,851 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:55:18,852 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/discover_list.c [2020-10-13 10:55:18,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0d3d08dd/2bc645a701ef4b8db846f14d8e42052a/FLAG45df1b408 [2020-10-13 10:55:19,395 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:55:19,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/discover_list.c [2020-10-13 10:55:19,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0d3d08dd/2bc645a701ef4b8db846f14d8e42052a/FLAG45df1b408 [2020-10-13 10:55:19,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0d3d08dd/2bc645a701ef4b8db846f14d8e42052a [2020-10-13 10:55:19,714 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:55:19,715 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:55:19,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:55:19,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:55:19,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:55:19,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:55:19" (1/1) ... [2020-10-13 10:55:19,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4916cb65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:19, skipping insertion in model container [2020-10-13 10:55:19,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:55:19" (1/1) ... [2020-10-13 10:55:19,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:55:19,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:55:20,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:55:20,215 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:55:20,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:55:20,354 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:55:20,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:20 WrapperNode [2020-10-13 10:55:20,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:55:20,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:55:20,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:55:20,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:55:20,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:20" (1/1) ... [2020-10-13 10:55:20,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:20" (1/1) ... [2020-10-13 10:55:20,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:20" (1/1) ... [2020-10-13 10:55:20,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:20" (1/1) ... [2020-10-13 10:55:20,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:20" (1/1) ... [2020-10-13 10:55:20,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:20" (1/1) ... [2020-10-13 10:55:20,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:20" (1/1) ... [2020-10-13 10:55:20,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:55:20,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:55:20,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:55:20,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:55:20,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:55:20,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:55:20,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:55:20,608 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:55:20,608 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_func_def_resp_len [2020-10-13 10:55:20,608 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_is_naa5 [2020-10-13 10:55:20,608 INFO L138 BoogieDeclarations]: Found implementation of procedure dStrHex [2020-10-13 10:55:20,609 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_num [2020-10-13 10:55:20,610 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_llnum [2020-10-13 10:55:20,610 INFO L138 BoogieDeclarations]: Found implementation of procedure do_discover_list [2020-10-13 10:55:20,610 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:55:20,610 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2020-10-13 10:55:20,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:55:20,611 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 10:55:20,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:55:20,611 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-10-13 10:55:20,612 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-10-13 10:55:20,612 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-13 10:55:20,612 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2020-10-13 10:55:20,613 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-10-13 10:55:20,613 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-10-13 10:55:20,613 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-10-13 10:55:20,613 INFO L130 BoogieDeclarations]: Found specification of procedure getopt_long [2020-10-13 10:55:20,614 INFO L130 BoogieDeclarations]: Found specification of procedure smp_initiator_open [2020-10-13 10:55:20,614 INFO L130 BoogieDeclarations]: Found specification of procedure smp_send_req [2020-10-13 10:55:20,614 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_func_def_resp_len [2020-10-13 10:55:20,615 INFO L130 BoogieDeclarations]: Found specification of procedure smp_is_naa5 [2020-10-13 10:55:20,616 INFO L130 BoogieDeclarations]: Found specification of procedure dStrHex [2020-10-13 10:55:20,616 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_num [2020-10-13 10:55:20,616 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_llnum [2020-10-13 10:55:20,616 INFO L130 BoogieDeclarations]: Found specification of procedure do_discover_list [2020-10-13 10:55:20,616 INFO L130 BoogieDeclarations]: Found specification of procedure main6 [2020-10-13 10:55:20,617 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-10-13 10:55:20,617 INFO L130 BoogieDeclarations]: Found specification of procedure toupper [2020-10-13 10:55:20,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:55:20,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:55:20,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:55:20,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:55:20,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2020-10-13 10:55:20,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:55:20,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-13 10:55:20,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:55:20,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 10:55:20,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:55:20,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:55:22,098 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:55:22,098 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 10:55:22,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:55:22 BoogieIcfgContainer [2020-10-13 10:55:22,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:55:22,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:55:22,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:55:22,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:55:22,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:55:19" (1/3) ... [2020-10-13 10:55:22,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a89f8ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:55:22, skipping insertion in model container [2020-10-13 10:55:22,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:20" (2/3) ... [2020-10-13 10:55:22,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a89f8ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:55:22, skipping insertion in model container [2020-10-13 10:55:22,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:55:22" (3/3) ... [2020-10-13 10:55:22,115 INFO L109 eAbstractionObserver]: Analyzing ICFG discover_list.c [2020-10-13 10:55:22,126 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:55:22,135 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:55:22,150 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:55:22,179 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:55:22,180 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:55:22,180 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:55:22,180 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:55:22,180 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:55:22,181 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:55:22,181 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:55:22,181 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:55:22,200 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2020-10-13 10:55:22,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:55:22,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:22,209 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:22,209 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:22,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:22,216 INFO L82 PathProgramCache]: Analyzing trace with hash -2122850676, now seen corresponding path program 1 times [2020-10-13 10:55:22,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:22,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830837513] [2020-10-13 10:55:22,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:22,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:22,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:22,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:24,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:27,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:55:27,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:55:27,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-13 10:55:27,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:27,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:55:27,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:55:27,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:55:27,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 10:55:27,907 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 10:55:27,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:27,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:27,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:27,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:27,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-13 10:55:27,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:27,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:27,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:27,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:27,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:55:28,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:55:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:28,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:28,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:55:28,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:28,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 10:55:28,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:28,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:28,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 10:55:28,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:28,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:55:28,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-13 10:55:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:28,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:28,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:55:28,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:28,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:55:28,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:28,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:28,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 10:55:28,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:28,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 10:55:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:55:28,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830837513] [2020-10-13 10:55:28,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:55:28,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:55:28,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35325122] [2020-10-13 10:55:28,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:55:28,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:28,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:55:28,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:55:28,122 INFO L87 Difference]: Start difference. First operand 91 states. Second operand 5 states. [2020-10-13 10:55:28,292 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:55:29,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:29,087 INFO L93 Difference]: Finished difference Result 205 states and 313 transitions. [2020-10-13 10:55:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:55:29,090 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-13 10:55:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:29,103 INFO L225 Difference]: With dead ends: 205 [2020-10-13 10:55:29,104 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 10:55:29,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:55:29,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 10:55:29,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 76. [2020-10-13 10:55:29,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 10:55:29,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-10-13 10:55:29,171 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 46 [2020-10-13 10:55:29,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:29,172 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-10-13 10:55:29,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:55:29,172 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-10-13 10:55:29,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:55:29,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:29,175 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:29,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:55:29,176 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:29,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:29,177 INFO L82 PathProgramCache]: Analyzing trace with hash -71866678, now seen corresponding path program 1 times [2020-10-13 10:55:29,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:29,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162540385] [2020-10-13 10:55:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:29,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:29,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:29,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:34,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:34,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:55:34,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:34,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 10:55:34,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:34,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:55:34,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:55:34,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:55:34,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:34,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:34,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:34,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:34,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:34,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:34,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 10:55:34,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:34,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:34,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:34,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:34,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:34,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:55:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:34,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:34,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:34,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:55:34,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:34,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:55:34,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:34,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:55:34,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:55:34,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:55:34,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:34,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-13 10:55:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:34,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:34,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:34,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:34,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:55:34,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:34,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:55:34,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:34,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:34,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 10:55:34,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:34,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:55:34,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162540385] [2020-10-13 10:55:34,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:34,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:55:34,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838171889] [2020-10-13 10:55:34,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:55:34,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:34,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:55:34,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:55:34,464 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 6 states. [2020-10-13 10:55:34,576 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:55:34,935 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 10:55:35,107 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-13 10:55:35,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:35,497 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2020-10-13 10:55:35,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:55:35,498 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-13 10:55:35,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:35,500 INFO L225 Difference]: With dead ends: 136 [2020-10-13 10:55:35,500 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 10:55:35,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:55:35,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 10:55:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-13 10:55:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 10:55:35,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2020-10-13 10:55:35,519 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 46 [2020-10-13 10:55:35,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:35,520 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2020-10-13 10:55:35,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:55:35,520 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2020-10-13 10:55:35,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 10:55:35,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:35,522 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-10-13 10:55:35,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:55:35,523 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:35,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:35,523 INFO L82 PathProgramCache]: Analyzing trace with hash -974675620, now seen corresponding path program 1 times [2020-10-13 10:55:35,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:35,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984219096] [2020-10-13 10:55:35,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:35,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:35,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:36,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:40,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:40,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 10:55:40,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:40,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-13 10:55:40,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:40,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:55:40,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 10:55:40,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:55:40,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 10:55:40,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:40,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:40,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:40,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:40,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:40,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 10:55:40,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:40,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:40,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:40,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:40,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:40,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:55:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:40,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:40,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:40,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:40,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:55:40,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:40,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:55:40,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:40,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:40,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:40,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:40,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:40,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 10:55:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:40,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:40,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:40,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:40,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:55:40,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:40,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:55:40,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:40,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:40,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 10:55:40,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:40,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 10:55:40,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984219096] [2020-10-13 10:55:40,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:55:40,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 10:55:40,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488859201] [2020-10-13 10:55:40,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:55:40,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:40,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:55:40,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:55:40,910 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand 7 states. [2020-10-13 10:55:41,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:41,599 INFO L93 Difference]: Finished difference Result 115 states and 147 transitions. [2020-10-13 10:55:41,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:55:41,599 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-10-13 10:55:41,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:41,601 INFO L225 Difference]: With dead ends: 115 [2020-10-13 10:55:41,601 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 10:55:41,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:55:41,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 10:55:41,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-13 10:55:41,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 10:55:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2020-10-13 10:55:41,615 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 48 [2020-10-13 10:55:41,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:41,615 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2020-10-13 10:55:41,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:55:41,615 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2020-10-13 10:55:41,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 10:55:41,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:41,617 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-10-13 10:55:41,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:55:41,618 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:41,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:41,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1019469086, now seen corresponding path program 1 times [2020-10-13 10:55:41,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:41,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134206812] [2020-10-13 10:55:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:41,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:41,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:44,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:44,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 10:55:44,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:44,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2770 [2020-10-13 10:55:44,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:44,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:55:44,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 10:55:44,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:55:44,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:44,577 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 10:55:44,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:44,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:44,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:44,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:44,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:44,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 10:55:44,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:44,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:44,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:44,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:44,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:44,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:55:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:44,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:44,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:44,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:44,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:55:44,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:44,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 10:55:44,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:44,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:44,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:44,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:44,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:44,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 10:55:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:44,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:44,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:44,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:55:44,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:44,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 10:55:44,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:44,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:55:44,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:55:44,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:55:44,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:55:44,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134206812] [2020-10-13 10:55:44,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:44,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:55:44,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336945898] [2020-10-13 10:55:44,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:55:44,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:44,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:55:44,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:55:44,729 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand 7 states. [2020-10-13 10:55:44,878 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:55:45,166 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 10:55:45,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:45,668 INFO L93 Difference]: Finished difference Result 138 states and 178 transitions. [2020-10-13 10:55:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:55:45,669 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-10-13 10:55:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:45,670 INFO L225 Difference]: With dead ends: 138 [2020-10-13 10:55:45,670 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 10:55:45,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:55:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 10:55:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-13 10:55:45,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 10:55:45,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2020-10-13 10:55:45,699 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 48 [2020-10-13 10:55:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:45,699 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2020-10-13 10:55:45,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:55:45,700 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2020-10-13 10:55:45,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:55:45,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:45,704 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2020-10-13 10:55:45,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:55:45,704 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:45,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:45,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1424139272, now seen corresponding path program 2 times [2020-10-13 10:55:45,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:45,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950925298] [2020-10-13 10:55:45,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:45,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:45,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:48,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:48,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:55:48,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:48,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3155 [2020-10-13 10:55:48,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:48,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:55:48,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 10:55:48,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:55:48,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:49,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:49,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:49,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:49,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:49,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 10:55:49,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:49,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:49,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:49,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:49,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:49,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:55:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:49,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:49,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 10:55:49,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:49,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:55:49,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:49,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:49,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:49,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:49,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:49,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 10:55:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:49,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:49,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 10:55:49,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:49,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 10:55:49,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:49,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:55:49,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:55:49,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:55:49,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:55:49,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950925298] [2020-10-13 10:55:49,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:49,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:55:49,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887799483] [2020-10-13 10:55:49,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:55:49,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:49,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:55:49,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:55:49,121 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand 8 states. [2020-10-13 10:55:49,485 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 10:55:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:50,150 INFO L93 Difference]: Finished difference Result 140 states and 180 transitions. [2020-10-13 10:55:50,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:55:50,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-10-13 10:55:50,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:50,153 INFO L225 Difference]: With dead ends: 140 [2020-10-13 10:55:50,153 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 10:55:50,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:55:50,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 10:55:50,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-13 10:55:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 10:55:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2020-10-13 10:55:50,176 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 50 [2020-10-13 10:55:50,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:50,176 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2020-10-13 10:55:50,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:55:50,177 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2020-10-13 10:55:50,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:55:50,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:50,180 INFO L422 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1] [2020-10-13 10:55:50,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:55:50,181 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:50,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:50,183 INFO L82 PathProgramCache]: Analyzing trace with hash 866371806, now seen corresponding path program 3 times [2020-10-13 10:55:50,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:50,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635685103] [2020-10-13 10:55:50,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:50,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:50,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:53,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:53,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 10:55:53,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:53,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3399 [2020-10-13 10:55:53,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:53,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:55:53,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 10:55:53,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:55:53,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:53,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:53,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:53,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:53,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:53,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:53,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 10:55:53,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:53,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:53,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:53,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:53,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:53,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:55:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:53,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:53,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:53,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:53,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 10:55:53,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:53,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-13 10:55:53,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:53,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:53,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:53,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:53,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:53,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 10:55:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:53,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:53,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:53,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 10:55:53,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:53,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 10:55:53,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:53,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:55:53,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:55:53,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:55:53,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 10:55:53,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635685103] [2020-10-13 10:55:53,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:53,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:55:53,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733807381] [2020-10-13 10:55:53,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:55:53,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:53,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:55:53,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:55:53,884 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 9 states. [2020-10-13 10:55:54,260 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 10:55:54,381 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:55:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:55,024 INFO L93 Difference]: Finished difference Result 142 states and 182 transitions. [2020-10-13 10:55:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:55:55,025 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2020-10-13 10:55:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:55,026 INFO L225 Difference]: With dead ends: 142 [2020-10-13 10:55:55,026 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 10:55:55,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:55:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 10:55:55,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-13 10:55:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 10:55:55,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2020-10-13 10:55:55,045 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 52 [2020-10-13 10:55:55,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:55,046 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2020-10-13 10:55:55,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:55:55,046 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2020-10-13 10:55:55,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:55:55,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:55,047 INFO L422 BasicCegarLoop]: trace histogram [8, 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, 1, 1, 1, 1] [2020-10-13 10:55:55,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:55:55,048 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:55,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:55,048 INFO L82 PathProgramCache]: Analyzing trace with hash 2055515464, now seen corresponding path program 4 times [2020-10-13 10:55:55,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:55,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953260534] [2020-10-13 10:55:55,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:55,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:55,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:59,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:59,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:55:59,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:59,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4062 [2020-10-13 10:55:59,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:59,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:55:59,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:55:59,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:55:59,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:59,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:59,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:59,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:59,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:55:59,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:59,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:55:59,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:59,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:59,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:59,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:59,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:59,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:55:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:59,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:59,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:59,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 10:55:59,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:59,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 10:55:59,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:59,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:55:59,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:55:59,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:55:59,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:59,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 10:55:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:59,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:59,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:59,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:59,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 10:55:59,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:59,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-13 10:55:59,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:59,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:59,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:59,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:59,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 10:55:59,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953260534] [2020-10-13 10:55:59,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:59,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:55:59,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034833705] [2020-10-13 10:55:59,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:55:59,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:59,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:55:59,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:55:59,429 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand 10 states. [2020-10-13 10:56:00,005 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:56:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:00,773 INFO L93 Difference]: Finished difference Result 144 states and 184 transitions. [2020-10-13 10:56:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:56:00,773 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-13 10:56:00,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:00,775 INFO L225 Difference]: With dead ends: 144 [2020-10-13 10:56:00,775 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 10:56:00,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:56:00,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 10:56:00,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-13 10:56:00,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 10:56:00,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2020-10-13 10:56:00,795 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 54 [2020-10-13 10:56:00,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:00,796 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2020-10-13 10:56:00,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:56:00,796 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2020-10-13 10:56:00,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:56:00,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:00,797 INFO L422 BasicCegarLoop]: trace histogram [10, 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, 1, 1, 1, 1] [2020-10-13 10:56:00,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:56:00,797 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:00,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:00,797 INFO L82 PathProgramCache]: Analyzing trace with hash -207870818, now seen corresponding path program 5 times [2020-10-13 10:56:00,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:00,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947262013] [2020-10-13 10:56:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:00,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:00,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:05,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:05,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:56:05,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:05,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4606 [2020-10-13 10:56:05,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:05,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:56:05,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 10:56:05,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:56:05,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:05,569 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 10:56:05,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:05,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:05,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:05,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:56:05,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:05,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 10:56:05,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:05,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:05,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:05,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:05,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:05,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:56:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:05,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:05,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:05,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:05,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 10:56:05,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:05,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-13 10:56:05,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:05,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:05,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:05,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:05,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:05,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 10:56:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:05,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:05,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:05,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 10:56:05,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:05,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-13 10:56:05,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:05,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:56:05,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:56:05,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:56:05,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 10:56:05,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947262013] [2020-10-13 10:56:05,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:05,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:56:05,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666070848] [2020-10-13 10:56:05,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:56:05,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:05,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:56:05,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:56:05,814 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand 11 states. [2020-10-13 10:56:06,839 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-13 10:56:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:07,125 INFO L93 Difference]: Finished difference Result 146 states and 186 transitions. [2020-10-13 10:56:07,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:56:07,126 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-13 10:56:07,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:07,127 INFO L225 Difference]: With dead ends: 146 [2020-10-13 10:56:07,128 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 10:56:07,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:56:07,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 10:56:07,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-13 10:56:07,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 10:56:07,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2020-10-13 10:56:07,151 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 56 [2020-10-13 10:56:07,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:07,151 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2020-10-13 10:56:07,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:56:07,151 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2020-10-13 10:56:07,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:56:07,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:07,152 INFO L422 BasicCegarLoop]: trace histogram [12, 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, 1, 1, 1, 1] [2020-10-13 10:56:07,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:56:07,153 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:07,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:07,154 INFO L82 PathProgramCache]: Analyzing trace with hash -107624824, now seen corresponding path program 6 times [2020-10-13 10:56:07,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:07,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364906890] [2020-10-13 10:56:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:07,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:07,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:12,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:12,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:56:12,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:12,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 10:56:12,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:12,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:56:12,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-13 10:56:12,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:56:12,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:12,332 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 10:56:12,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:12,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:12,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:12,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:56:12,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:12,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 10:56:12,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:12,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:12,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:12,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:12,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:12,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:56:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:12,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:12,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:12,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:12,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 10:56:12,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:12,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-13 10:56:12,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:12,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:12,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:12,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:12,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:12,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 10:56:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:12,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:12,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:12,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 10:56:12,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:12,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-13 10:56:12,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:12,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:56:12,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:56:12,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:56:12,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 10:56:12,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364906890] [2020-10-13 10:56:12,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:12,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:56:12,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889642455] [2020-10-13 10:56:12,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:56:12,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:12,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:56:12,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:56:12,640 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand 12 states. [2020-10-13 10:56:12,783 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:56:13,720 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:56:14,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:14,313 INFO L93 Difference]: Finished difference Result 148 states and 188 transitions. [2020-10-13 10:56:14,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:56:14,314 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-10-13 10:56:14,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:14,315 INFO L225 Difference]: With dead ends: 148 [2020-10-13 10:56:14,315 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 10:56:14,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:56:14,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 10:56:14,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-13 10:56:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 10:56:14,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2020-10-13 10:56:14,328 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 58 [2020-10-13 10:56:14,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:14,328 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2020-10-13 10:56:14,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:56:14,328 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2020-10-13 10:56:14,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:56:14,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:14,329 INFO L422 BasicCegarLoop]: trace histogram [14, 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, 1, 1, 1, 1] [2020-10-13 10:56:14,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:56:14,329 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:14,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:14,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1893666722, now seen corresponding path program 7 times [2020-10-13 10:56:14,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:14,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561057485] [2020-10-13 10:56:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:14,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:14,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:19,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:56:19,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:19,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 10:56:19,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:19,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:56:19,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 10:56:19,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:56:19,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:19,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:19,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:19,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:56:19,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:19,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 10:56:19,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:19,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:19,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:19,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:19,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:19,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:56:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:19,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:19,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 10:56:19,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:19,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-13 10:56:19,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:19,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:19,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:19,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:19,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:19,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 10:56:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:19,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:19,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 10:56:19,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:19,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-13 10:56:19,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:19,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:56:19,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:56:19,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:56:19,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 66 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-13 10:56:19,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561057485] [2020-10-13 10:56:19,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:19,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:56:19,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828415096] [2020-10-13 10:56:19,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:56:19,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:19,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:56:19,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:56:19,782 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand 13 states. [2020-10-13 10:56:20,562 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:56:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:21,497 INFO L93 Difference]: Finished difference Result 150 states and 190 transitions. [2020-10-13 10:56:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:56:21,497 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-10-13 10:56:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:21,499 INFO L225 Difference]: With dead ends: 150 [2020-10-13 10:56:21,499 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 10:56:21,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:56:21,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 10:56:21,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-13 10:56:21,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 10:56:21,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2020-10-13 10:56:21,513 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 60 [2020-10-13 10:56:21,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:21,514 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2020-10-13 10:56:21,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:56:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2020-10-13 10:56:21,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 10:56:21,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:21,515 INFO L422 BasicCegarLoop]: trace histogram [16, 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, 1, 1, 1, 1] [2020-10-13 10:56:21,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:56:21,515 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:21,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:21,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1251872824, now seen corresponding path program 8 times [2020-10-13 10:56:21,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:21,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267057560] [2020-10-13 10:56:21,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:21,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:21,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:22,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:26,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:26,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 10:56:26,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:26,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-13 10:56:26,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:26,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:56:26,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:56:26,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:56:26,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:26,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:26,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:26,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:26,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:56:26,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:26,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 10:56:26,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:26,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:26,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:26,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:26,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:26,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:56:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:26,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:26,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:26,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 10:56:26,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:26,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-13 10:56:26,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:26,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:56:26,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:56:26,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:56:26,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:26,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 10:56:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:26,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:26,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:26,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:26,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 10:56:26,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:26,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-13 10:56:26,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:26,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:26,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:56:26,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:26,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-13 10:56:26,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267057560] [2020-10-13 10:56:26,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:26,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:56:26,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094110642] [2020-10-13 10:56:26,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:56:26,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:26,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:56:26,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:56:26,955 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand 14 states. [2020-10-13 10:56:28,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:28,773 INFO L93 Difference]: Finished difference Result 152 states and 192 transitions. [2020-10-13 10:56:28,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:56:28,774 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-13 10:56:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:28,775 INFO L225 Difference]: With dead ends: 152 [2020-10-13 10:56:28,776 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 10:56:28,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:56:28,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 10:56:28,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-13 10:56:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 10:56:28,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 106 transitions. [2020-10-13 10:56:28,786 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 106 transitions. Word has length 62 [2020-10-13 10:56:28,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:28,786 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 106 transitions. [2020-10-13 10:56:28,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:56:28,789 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 106 transitions. [2020-10-13 10:56:28,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 10:56:28,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:28,791 INFO L422 BasicCegarLoop]: trace histogram [18, 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, 1, 1, 1, 1] [2020-10-13 10:56:28,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:56:28,792 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:28,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:28,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1671834654, now seen corresponding path program 9 times [2020-10-13 10:56:28,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:28,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734121028] [2020-10-13 10:56:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:28,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:28,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:29,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:33,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:33,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 10:56:33,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:33,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 10:56:33,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:33,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:56:33,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:56:33,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:56:33,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:33,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:33,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:33,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:33,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:56:33,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:33,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 10:56:33,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:33,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:33,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:33,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:33,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:33,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:56:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:33,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:34,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:34,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:56:34,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:34,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-13 10:56:34,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:34,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:56:34,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:56:34,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:56:34,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:34,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 10:56:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:34,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:34,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:34,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:34,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:56:34,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:34,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-13 10:56:34,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:34,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:34,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:56:34,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:34,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-13 10:56:34,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734121028] [2020-10-13 10:56:34,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:34,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:56:34,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502937586] [2020-10-13 10:56:34,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:56:34,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:34,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:56:34,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:56:34,202 INFO L87 Difference]: Start difference. First operand 85 states and 106 transitions. Second operand 15 states. [2020-10-13 10:56:36,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:36,250 INFO L93 Difference]: Finished difference Result 154 states and 194 transitions. [2020-10-13 10:56:36,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:56:36,251 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-10-13 10:56:36,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:36,253 INFO L225 Difference]: With dead ends: 154 [2020-10-13 10:56:36,253 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 10:56:36,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:56:36,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 10:56:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-13 10:56:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 10:56:36,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2020-10-13 10:56:36,267 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 64 [2020-10-13 10:56:36,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:36,267 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2020-10-13 10:56:36,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:56:36,267 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2020-10-13 10:56:36,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 10:56:36,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:36,271 INFO L422 BasicCegarLoop]: trace histogram [20, 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, 1, 1, 1, 1] [2020-10-13 10:56:36,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:56:36,271 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:36,272 INFO L82 PathProgramCache]: Analyzing trace with hash 104147208, now seen corresponding path program 10 times [2020-10-13 10:56:36,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:36,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941663082] [2020-10-13 10:56:36,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:36,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:36,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:36,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:41,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:41,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:56:41,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:41,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 10:56:41,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:41,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:56:41,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:56:41,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:56:41,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:41,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:41,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:41,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:41,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:56:41,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:41,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 10:56:41,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:41,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:41,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:41,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:41,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:41,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:56:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:41,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:41,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:41,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 10:56:41,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:41,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-13 10:56:41,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:41,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:56:41,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:56:41,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:56:41,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:41,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 10:56:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:41,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:41,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:41,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:41,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 10:56:41,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:41,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-13 10:56:41,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:41,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:41,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:56:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:41,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 10:56:41,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941663082] [2020-10-13 10:56:41,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:41,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:56:41,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997580506] [2020-10-13 10:56:41,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:56:41,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:41,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:56:41,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:56:41,799 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand 16 states. [2020-10-13 10:56:42,795 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:56:43,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:43,873 INFO L93 Difference]: Finished difference Result 156 states and 196 transitions. [2020-10-13 10:56:43,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:56:43,874 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-10-13 10:56:43,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:43,876 INFO L225 Difference]: With dead ends: 156 [2020-10-13 10:56:43,876 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 10:56:43,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:56:43,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 10:56:43,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-13 10:56:43,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 10:56:43,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2020-10-13 10:56:43,889 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 66 [2020-10-13 10:56:43,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:43,889 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2020-10-13 10:56:43,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:56:43,889 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2020-10-13 10:56:43,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 10:56:43,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:43,890 INFO L422 BasicCegarLoop]: trace histogram [22, 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, 1, 1, 1, 1] [2020-10-13 10:56:43,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:56:43,891 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:43,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:43,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1503647710, now seen corresponding path program 11 times [2020-10-13 10:56:43,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:43,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34610796] [2020-10-13 10:56:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:43,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:43,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:44,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:48,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:48,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 10:56:48,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:48,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 10:56:48,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:48,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:56:48,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:56:48,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:56:48,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:49,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:49,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:49,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:49,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:56:49,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:49,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:56:49,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:49,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:49,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:49,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:49,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:49,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:56:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:49,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:49,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:49,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:56:49,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:49,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-13 10:56:49,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:49,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:56:49,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:56:49,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:56:49,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:49,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 10:56:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:49,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:49,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:49,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:49,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:56:49,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:49,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-13 10:56:49,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:49,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:49,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:56:49,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:49,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-13 10:56:49,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34610796] [2020-10-13 10:56:49,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:49,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:56:49,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052929381] [2020-10-13 10:56:49,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:56:49,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:49,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:56:49,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:56:49,354 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 17 states. [2020-10-13 10:56:51,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:51,546 INFO L93 Difference]: Finished difference Result 158 states and 198 transitions. [2020-10-13 10:56:51,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:56:51,547 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-10-13 10:56:51,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:51,548 INFO L225 Difference]: With dead ends: 158 [2020-10-13 10:56:51,548 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 10:56:51,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=289, Invalid=641, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:56:51,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 10:56:51,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-13 10:56:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 10:56:51,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-10-13 10:56:51,561 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 68 [2020-10-13 10:56:51,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:51,561 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-10-13 10:56:51,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:56:51,562 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-10-13 10:56:51,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 10:56:51,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:51,563 INFO L422 BasicCegarLoop]: trace histogram [24, 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, 1, 1, 1, 1] [2020-10-13 10:56:51,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:56:51,563 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:51,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:51,564 INFO L82 PathProgramCache]: Analyzing trace with hash 2036036168, now seen corresponding path program 12 times [2020-10-13 10:56:51,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:51,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596641076] [2020-10-13 10:56:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:51,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:56,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:56,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 10:56:56,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:56,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-13 10:56:56,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:56,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:56:56,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:56:56,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:56:56,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:56,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:56,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:56,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:56,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:56:56,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:56,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 10:56:56,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:56,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:56,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:56,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:56,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:56,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:56:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:56,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:56,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:56,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:56:56,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:56,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-13 10:56:56,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:56,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:56:56,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:56:56,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:56:56,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:57,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 10:56:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:57,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:57,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:57,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:57,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:56:57,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:57,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-13 10:56:57,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:57,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:57,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:56:57,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:57,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 249 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-13 10:56:57,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596641076] [2020-10-13 10:56:57,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:57,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:56:57,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360642334] [2020-10-13 10:56:57,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:56:57,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:57,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:56:57,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:56:57,148 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 18 states. [2020-10-13 10:56:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:59,707 INFO L93 Difference]: Finished difference Result 160 states and 200 transitions. [2020-10-13 10:56:59,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:56:59,708 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-13 10:56:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:59,709 INFO L225 Difference]: With dead ends: 160 [2020-10-13 10:56:59,710 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 10:56:59,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=331, Invalid=725, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:56:59,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 10:56:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-13 10:56:59,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 10:56:59,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 110 transitions. [2020-10-13 10:56:59,721 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 110 transitions. Word has length 70 [2020-10-13 10:56:59,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:59,722 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 110 transitions. [2020-10-13 10:56:59,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:56:59,722 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 110 transitions. [2020-10-13 10:56:59,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 10:56:59,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:59,723 INFO L422 BasicCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1] [2020-10-13 10:56:59,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:56:59,723 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:59,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:59,723 INFO L82 PathProgramCache]: Analyzing trace with hash 612496286, now seen corresponding path program 13 times [2020-10-13 10:56:59,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:59,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106712414] [2020-10-13 10:56:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:59,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:59,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:00,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:04,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:04,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 10:57:04,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:57:04,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 10:57:04,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:04,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:57:04,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:57:04,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:57:04,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:04,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:04,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:04,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:04,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:04,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:04,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 10:57:04,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:04,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:04,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:04,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:04,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:04,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:57:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:04,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:04,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:04,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:57:04,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:04,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-13 10:57:04,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:04,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:57:04,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:57:04,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:57:04,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:05,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 10:57:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:05,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:05,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:05,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:05,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:57:05,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:05,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-13 10:57:05,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:05,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:05,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:57:05,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:05,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 10:57:05,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106712414] [2020-10-13 10:57:05,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:05,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:57:05,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339797593] [2020-10-13 10:57:05,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:57:05,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:05,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:57:05,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:57:05,304 INFO L87 Difference]: Start difference. First operand 89 states and 110 transitions. Second operand 19 states. [2020-10-13 10:57:08,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:08,295 INFO L93 Difference]: Finished difference Result 162 states and 202 transitions. [2020-10-13 10:57:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:57:08,296 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 72 [2020-10-13 10:57:08,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:08,298 INFO L225 Difference]: With dead ends: 162 [2020-10-13 10:57:08,298 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 10:57:08,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=376, Invalid=814, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:57:08,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 10:57:08,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-13 10:57:08,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 10:57:08,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2020-10-13 10:57:08,310 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 72 [2020-10-13 10:57:08,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:08,310 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2020-10-13 10:57:08,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:57:08,311 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2020-10-13 10:57:08,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 10:57:08,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:08,312 INFO L422 BasicCegarLoop]: trace histogram [28, 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, 1, 1, 1, 1] [2020-10-13 10:57:08,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:57:08,312 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:08,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:08,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1860121720, now seen corresponding path program 14 times [2020-10-13 10:57:08,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:08,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507035113] [2020-10-13 10:57:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:08,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:08,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:09,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:13,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:13,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 10:57:13,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:57:13,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 10:57:13,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:13,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:57:13,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-13 10:57:13,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:57:13,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:13,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:13,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:13,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:13,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:13,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:13,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:57:13,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:13,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:13,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:57:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:13,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:13,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:13,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:13,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:57:13,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:13,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-13 10:57:13,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:13,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:13,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:13,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:13,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:13,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-13 10:57:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:13,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:13,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:13,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:57:13,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:13,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-13 10:57:13,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:13,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:57:13,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:57:13,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:57:13,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 227 proven. 105 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-10-13 10:57:13,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507035113] [2020-10-13 10:57:13,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:13,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:57:13,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191597978] [2020-10-13 10:57:13,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:57:13,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:13,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:57:13,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:57:13,900 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand 20 states. [2020-10-13 10:57:17,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:17,116 INFO L93 Difference]: Finished difference Result 164 states and 204 transitions. [2020-10-13 10:57:17,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:57:17,118 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2020-10-13 10:57:17,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:17,119 INFO L225 Difference]: With dead ends: 164 [2020-10-13 10:57:17,119 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 10:57:17,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=424, Invalid=908, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:57:17,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 10:57:17,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-13 10:57:17,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 10:57:17,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2020-10-13 10:57:17,138 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 74 [2020-10-13 10:57:17,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:17,138 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2020-10-13 10:57:17,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:57:17,138 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2020-10-13 10:57:17,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 10:57:17,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:17,142 INFO L422 BasicCegarLoop]: trace histogram [30, 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, 1, 1, 1, 1] [2020-10-13 10:57:17,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:57:17,143 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:17,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:17,143 INFO L82 PathProgramCache]: Analyzing trace with hash -2101313698, now seen corresponding path program 15 times [2020-10-13 10:57:17,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:17,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393062476] [2020-10-13 10:57:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:17,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:17,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:18,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:22,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:22,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 10:57:22,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:57:22,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 10:57:22,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:22,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:57:22,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:57:22,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:57:22,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:22,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:22,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:22,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:22,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:22,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:22,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:57:22,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:22,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:22,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:22,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:22,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:22,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:57:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:22,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:22,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:22,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:57:22,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:22,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-13 10:57:22,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:22,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:57:22,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:57:22,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:57:22,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:22,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 10:57:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:22,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:22,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:22,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:22,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:57:22,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:22,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-13 10:57:22,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:22,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:22,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 10:57:22,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:22,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 10:57:22,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393062476] [2020-10-13 10:57:22,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:22,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:57:22,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191606192] [2020-10-13 10:57:22,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:57:22,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:22,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:57:22,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:57:22,768 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand 21 states. [2020-10-13 10:57:23,653 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:57:24,274 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:57:25,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:25,771 INFO L93 Difference]: Finished difference Result 166 states and 206 transitions. [2020-10-13 10:57:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:57:25,773 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 76 [2020-10-13 10:57:25,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:25,774 INFO L225 Difference]: With dead ends: 166 [2020-10-13 10:57:25,774 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 10:57:25,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=475, Invalid=1007, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:57:25,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 10:57:25,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-13 10:57:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 10:57:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 113 transitions. [2020-10-13 10:57:25,786 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 113 transitions. Word has length 76 [2020-10-13 10:57:25,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:25,786 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 113 transitions. [2020-10-13 10:57:25,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:57:25,786 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 113 transitions. [2020-10-13 10:57:25,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 10:57:25,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:25,787 INFO L422 BasicCegarLoop]: trace histogram [32, 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, 1, 1, 1, 1] [2020-10-13 10:57:25,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:57:25,787 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:25,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:25,788 INFO L82 PathProgramCache]: Analyzing trace with hash -2066664248, now seen corresponding path program 16 times [2020-10-13 10:57:25,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:25,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277904760] [2020-10-13 10:57:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:25,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:25,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:26,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:30,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:30,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 10:57:30,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:57:30,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 10:57:30,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:30,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:57:30,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-13 10:57:30,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:57:30,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:30,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:30,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:30,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:30,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:30,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:30,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 10:57:30,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:30,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:30,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:30,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:30,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:30,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:57:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:30,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:31,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:31,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:31,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:57:31,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:31,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-13 10:57:31,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:31,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:31,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:31,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:31,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:31,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 10:57:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:31,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:31,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:31,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:57:31,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:31,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-13 10:57:31,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:31,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:57:31,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:57:31,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:57:31,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 291 proven. 136 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-10-13 10:57:31,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277904760] [2020-10-13 10:57:31,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:31,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:57:31,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683294974] [2020-10-13 10:57:31,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:57:31,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:31,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:57:31,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:57:31,483 INFO L87 Difference]: Start difference. First operand 92 states and 113 transitions. Second operand 22 states. [2020-10-13 10:57:34,346 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:57:34,492 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-13 10:57:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:34,918 INFO L93 Difference]: Finished difference Result 168 states and 208 transitions. [2020-10-13 10:57:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:57:34,919 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 78 [2020-10-13 10:57:34,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:34,920 INFO L225 Difference]: With dead ends: 168 [2020-10-13 10:57:34,920 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 10:57:34,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=529, Invalid=1111, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:57:34,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 10:57:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-13 10:57:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 10:57:34,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-10-13 10:57:34,937 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 78 [2020-10-13 10:57:34,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:34,938 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-10-13 10:57:34,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:57:34,939 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-10-13 10:57:34,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 10:57:34,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:34,940 INFO L422 BasicCegarLoop]: trace histogram [34, 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, 1, 1, 1, 1] [2020-10-13 10:57:34,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:57:34,941 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:34,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:34,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2110749470, now seen corresponding path program 17 times [2020-10-13 10:57:34,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:34,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091364998] [2020-10-13 10:57:34,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:35,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:35,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:36,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:39,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:40,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:40,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 10:57:40,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:57:40,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-13 10:57:40,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:40,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:57:40,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:57:40,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:57:40,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:40,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:40,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:40,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:40,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:40,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:40,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:57:40,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:40,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:40,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:40,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:40,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:40,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:57:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:40,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:40,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:40,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:57:40,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:40,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-13 10:57:40,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:40,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:57:40,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:57:40,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:57:40,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:40,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 10:57:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:40,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:40,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:40,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:40,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:57:40,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:40,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-13 10:57:40,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:40,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:40,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:57:40,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:40,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 479 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-10-13 10:57:40,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091364998] [2020-10-13 10:57:40,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:40,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:57:40,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389602184] [2020-10-13 10:57:40,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:57:40,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:40,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:57:40,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:57:40,785 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 23 states. [2020-10-13 10:57:42,709 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:57:42,882 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:57:44,233 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-13 10:57:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:44,695 INFO L93 Difference]: Finished difference Result 170 states and 210 transitions. [2020-10-13 10:57:44,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:57:44,696 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 80 [2020-10-13 10:57:44,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:44,698 INFO L225 Difference]: With dead ends: 170 [2020-10-13 10:57:44,698 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 10:57:44,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=586, Invalid=1220, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:57:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 10:57:44,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-13 10:57:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 10:57:44,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2020-10-13 10:57:44,713 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 80 [2020-10-13 10:57:44,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:44,713 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2020-10-13 10:57:44,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:57:44,713 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2020-10-13 10:57:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 10:57:44,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:44,714 INFO L422 BasicCegarLoop]: trace histogram [36, 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, 1, 1, 1, 1] [2020-10-13 10:57:44,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:57:44,715 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:44,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:44,715 INFO L82 PathProgramCache]: Analyzing trace with hash 12103176, now seen corresponding path program 18 times [2020-10-13 10:57:44,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:44,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178509791] [2020-10-13 10:57:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:44,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:44,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:44,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:49,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:49,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 10:57:49,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:57:49,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-13 10:57:49,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:49,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:57:49,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 10:57:49,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:57:49,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:49,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:49,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:49,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:49,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:49,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:49,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 10:57:49,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:49,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:49,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:49,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:49,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:49,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:57:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:49,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:49,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:50,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:50,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:57:50,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:50,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-13 10:57:50,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:50,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:50,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:50,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:50,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:50,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 10:57:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:50,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:50,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:50,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:57:50,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:50,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-13 10:57:50,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:50,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:57:50,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:57:50,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:57:50,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 363 proven. 171 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-10-13 10:57:50,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178509791] [2020-10-13 10:57:50,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:50,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:57:50,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34120367] [2020-10-13 10:57:50,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:57:50,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:50,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:57:50,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:57:50,510 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand 24 states. [2020-10-13 10:57:51,307 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:57:51,700 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:57:53,836 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-13 10:57:54,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:54,200 INFO L93 Difference]: Finished difference Result 172 states and 212 transitions. [2020-10-13 10:57:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:57:54,201 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-10-13 10:57:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:54,202 INFO L225 Difference]: With dead ends: 172 [2020-10-13 10:57:54,202 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 10:57:54,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=646, Invalid=1334, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:57:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 10:57:54,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-13 10:57:54,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 10:57:54,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2020-10-13 10:57:54,216 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 82 [2020-10-13 10:57:54,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:54,216 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2020-10-13 10:57:54,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:57:54,216 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2020-10-13 10:57:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 10:57:54,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:54,218 INFO L422 BasicCegarLoop]: trace histogram [38, 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, 1, 1, 1, 1] [2020-10-13 10:57:54,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:57:54,218 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:54,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:54,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1440553250, now seen corresponding path program 19 times [2020-10-13 10:57:54,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:54,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429961226] [2020-10-13 10:57:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:54,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:54,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:55,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:58,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:59,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:59,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 10:57:59,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:57:59,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-13 10:57:59,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:59,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:57:59,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:57:59,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:57:59,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:59,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:59,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:59,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:59,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:59,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:59,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 10:57:59,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:59,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:59,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:59,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:59,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:59,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:57:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:59,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:59,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:59,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:57:59,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:59,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-13 10:57:59,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:59,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:57:59,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:57:59,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:57:59,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:59,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 10:57:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:59,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:59,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:00,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:00,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:58:00,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:58:00,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-13 10:58:00,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:00,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:00,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:58:00,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:00,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:58:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 592 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2020-10-13 10:58:00,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429961226] [2020-10-13 10:58:00,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:00,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:58:00,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921703510] [2020-10-13 10:58:00,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:58:00,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:00,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:58:00,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:58:00,227 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand 25 states. [2020-10-13 10:58:04,119 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:58:04,607 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-13 10:58:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:05,069 INFO L93 Difference]: Finished difference Result 174 states and 214 transitions. [2020-10-13 10:58:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:58:05,071 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 84 [2020-10-13 10:58:05,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:05,072 INFO L225 Difference]: With dead ends: 174 [2020-10-13 10:58:05,072 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 10:58:05,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=709, Invalid=1453, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:58:05,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 10:58:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-13 10:58:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 10:58:05,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 117 transitions. [2020-10-13 10:58:05,086 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 117 transitions. Word has length 84 [2020-10-13 10:58:05,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:05,086 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 117 transitions. [2020-10-13 10:58:05,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:58:05,086 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 117 transitions. [2020-10-13 10:58:05,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 10:58:05,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:05,087 INFO L422 BasicCegarLoop]: trace histogram [40, 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, 1, 1, 1, 1] [2020-10-13 10:58:05,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:58:05,088 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:05,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:05,088 INFO L82 PathProgramCache]: Analyzing trace with hash -433899704, now seen corresponding path program 20 times [2020-10-13 10:58:05,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:05,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873634334] [2020-10-13 10:58:05,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:05,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:05,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:05,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:10,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:10,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 10:58:10,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:58:10,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:58:10,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:10,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:58:10,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-13 10:58:10,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:58:10,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:10,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:10,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:10,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:10,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:58:10,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:10,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 10:58:10,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:10,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:10,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:10,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:10,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:10,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:58:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:10,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:10,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:10,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:10,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:58:10,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:58:10,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-13 10:58:10,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:10,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:10,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:10,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:10,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:10,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 10:58:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:10,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:10,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:10,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:58:10,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:10,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-13 10:58:10,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:10,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:58:10,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:58:10,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:58:10,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 443 proven. 210 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-10-13 10:58:10,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873634334] [2020-10-13 10:58:10,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:10,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:58:10,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044521982] [2020-10-13 10:58:10,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:58:10,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:10,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:58:10,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:58:10,977 INFO L87 Difference]: Start difference. First operand 96 states and 117 transitions. Second operand 26 states. [2020-10-13 10:58:11,126 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:58:15,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:15,621 INFO L93 Difference]: Finished difference Result 176 states and 216 transitions. [2020-10-13 10:58:15,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:58:15,622 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 86 [2020-10-13 10:58:15,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:15,623 INFO L225 Difference]: With dead ends: 176 [2020-10-13 10:58:15,623 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 10:58:15,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=775, Invalid=1577, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:58:15,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 10:58:15,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-13 10:58:15,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 10:58:15,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2020-10-13 10:58:15,635 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 86 [2020-10-13 10:58:15,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:15,635 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2020-10-13 10:58:15,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:58:15,635 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2020-10-13 10:58:15,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 10:58:15,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:15,636 INFO L422 BasicCegarLoop]: trace histogram [42, 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, 1, 1, 1, 1] [2020-10-13 10:58:15,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:58:15,637 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:15,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:15,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1731117726, now seen corresponding path program 21 times [2020-10-13 10:58:15,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:15,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047482154] [2020-10-13 10:58:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:15,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:15,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:15,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:20,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:20,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 10:58:20,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:58:20,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 10:58:20,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:20,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:58:20,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:58:20,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:58:20,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:20,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:20,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:20,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:20,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:58:20,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:20,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:58:20,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:20,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:20,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:20,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:20,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:20,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:58:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:20,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:20,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:20,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:58:20,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:20,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-13 10:58:20,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:20,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:58:20,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:58:20,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:58:20,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:21,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 10:58:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:21,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:21,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:21,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:21,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:58:21,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:58:21,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-13 10:58:21,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:21,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:21,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 10:58:21,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:21,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 717 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2020-10-13 10:58:21,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047482154] [2020-10-13 10:58:21,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:21,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:58:21,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496760590] [2020-10-13 10:58:21,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:58:21,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:21,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:58:21,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:58:21,532 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand 27 states. [2020-10-13 10:58:23,340 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:58:25,831 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-13 10:58:26,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:26,311 INFO L93 Difference]: Finished difference Result 178 states and 218 transitions. [2020-10-13 10:58:26,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:58:26,313 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2020-10-13 10:58:26,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:26,314 INFO L225 Difference]: With dead ends: 178 [2020-10-13 10:58:26,314 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 10:58:26,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=844, Invalid=1706, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:58:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 10:58:26,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-13 10:58:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 10:58:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 119 transitions. [2020-10-13 10:58:26,326 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 119 transitions. Word has length 88 [2020-10-13 10:58:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:26,327 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 119 transitions. [2020-10-13 10:58:26,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:58:26,327 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 119 transitions. [2020-10-13 10:58:26,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 10:58:26,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:26,328 INFO L422 BasicCegarLoop]: trace histogram [44, 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, 1, 1, 1, 1] [2020-10-13 10:58:26,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:58:26,328 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:26,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:26,329 INFO L82 PathProgramCache]: Analyzing trace with hash 190632072, now seen corresponding path program 22 times [2020-10-13 10:58:26,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:26,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727858540] [2020-10-13 10:58:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:26,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:26,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:27,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:31,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:31,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 10:58:31,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:58:31,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 10:58:31,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:31,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:58:31,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-13 10:58:31,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:58:31,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:31,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:31,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:31,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:31,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:58:31,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:31,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:58:31,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:31,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:31,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:31,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:31,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:31,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:58:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:31,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:31,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:31,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:31,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:58:31,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:58:31,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-13 10:58:31,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:31,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:31,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:31,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:31,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:31,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-13 10:58:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:31,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:31,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:31,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:58:31,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:31,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-13 10:58:31,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:31,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:58:31,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:58:31,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:58:31,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 531 proven. 253 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2020-10-13 10:58:32,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727858540] [2020-10-13 10:58:32,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:32,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:58:32,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281565615] [2020-10-13 10:58:32,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:58:32,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:32,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:58:32,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:58:32,269 INFO L87 Difference]: Start difference. First operand 98 states and 119 transitions. Second operand 28 states. [2020-10-13 10:58:32,794 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 10:58:33,049 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:58:36,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:36,272 INFO L93 Difference]: Finished difference Result 180 states and 220 transitions. [2020-10-13 10:58:36,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:58:36,273 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 90 [2020-10-13 10:58:36,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:36,275 INFO L225 Difference]: With dead ends: 180 [2020-10-13 10:58:36,275 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 10:58:36,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=916, Invalid=1840, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 10:58:36,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 10:58:36,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-13 10:58:36,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 10:58:36,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2020-10-13 10:58:36,288 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 90 [2020-10-13 10:58:36,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:36,288 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2020-10-13 10:58:36,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:58:36,288 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2020-10-13 10:58:36,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 10:58:36,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:36,289 INFO L422 BasicCegarLoop]: trace histogram [46, 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, 1, 1, 1, 1] [2020-10-13 10:58:36,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:58:36,290 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:36,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:36,290 INFO L82 PathProgramCache]: Analyzing trace with hash 526847582, now seen corresponding path program 23 times [2020-10-13 10:58:36,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:36,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083201150] [2020-10-13 10:58:36,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:36,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:36,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:36,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:41,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:41,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 10:58:41,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:58:41,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-13 10:58:41,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:41,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:58:41,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:58:41,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:58:41,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:41,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:41,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:41,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:41,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:58:41,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:41,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 10:58:41,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:41,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:41,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:41,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:41,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:41,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:58:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:41,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:41,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:41,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:58:41,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:41,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-13 10:58:41,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:41,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:58:41,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:58:41,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:58:41,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:42,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 10:58:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:42,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:42,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:42,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:42,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:58:42,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:58:42,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-13 10:58:42,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:42,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:42,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 10:58:42,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:42,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 0 proven. 854 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2020-10-13 10:58:42,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083201150] [2020-10-13 10:58:42,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:42,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:58:42,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419375896] [2020-10-13 10:58:42,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:58:42,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:42,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:58:42,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:58:42,379 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand 29 states. [2020-10-13 10:58:44,697 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:58:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:47,533 INFO L93 Difference]: Finished difference Result 182 states and 222 transitions. [2020-10-13 10:58:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:58:47,534 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 92 [2020-10-13 10:58:47,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:47,535 INFO L225 Difference]: With dead ends: 182 [2020-10-13 10:58:47,535 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 10:58:47,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=991, Invalid=1979, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 10:58:47,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 10:58:47,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-13 10:58:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 10:58:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2020-10-13 10:58:47,548 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 92 [2020-10-13 10:58:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:47,548 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2020-10-13 10:58:47,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:58:47,548 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2020-10-13 10:58:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 10:58:47,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:47,549 INFO L422 BasicCegarLoop]: trace histogram [48, 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, 1, 1, 1, 1] [2020-10-13 10:58:47,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:58:47,549 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:47,550 INFO L82 PathProgramCache]: Analyzing trace with hash -72255032, now seen corresponding path program 24 times [2020-10-13 10:58:47,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:47,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696756946] [2020-10-13 10:58:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:47,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:47,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:49,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:52,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:52,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 10:58:52,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:58:52,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-13 10:58:52,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:52,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:58:52,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-13 10:58:52,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:58:52,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:52,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:52,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:52,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:52,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:58:52,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:52,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 10:58:52,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:52,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:52,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:52,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:52,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:52,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:58:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:52,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:52,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:52,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:58:52,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:52,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 10:58:52,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:52,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:52,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 10:58:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:52,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:52,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:52,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:58:52,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:52,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-13 10:58:52,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:52,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:58:52,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:58:52,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:58:52,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 627 proven. 300 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-13 10:58:53,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696756946] [2020-10-13 10:58:53,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:53,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:58:53,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684113768] [2020-10-13 10:58:53,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:58:53,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:53,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:58:53,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:58:53,491 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand 30 states. [2020-10-13 10:58:54,867 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-13 10:58:55,008 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 10:58:57,467 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 10:58:57,807 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 10:58:57,984 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 10:58:58,165 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 10:58:58,347 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-13 10:59:02,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:02,730 INFO L93 Difference]: Finished difference Result 184 states and 217 transitions. [2020-10-13 10:59:02,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 10:59:02,731 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 94 [2020-10-13 10:59:02,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:02,733 INFO L225 Difference]: With dead ends: 184 [2020-10-13 10:59:02,733 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 10:59:02,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2122, Invalid=4520, Unknown=0, NotChecked=0, Total=6642 [2020-10-13 10:59:02,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 10:59:02,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-10-13 10:59:02,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-13 10:59:02,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 151 transitions. [2020-10-13 10:59:02,757 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 151 transitions. Word has length 94 [2020-10-13 10:59:02,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:02,757 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 151 transitions. [2020-10-13 10:59:02,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:59:02,758 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 151 transitions. [2020-10-13 10:59:02,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 10:59:02,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:02,758 INFO L422 BasicCegarLoop]: trace histogram [49, 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, 1, 1, 1, 1] [2020-10-13 10:59:02,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:59:02,759 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:02,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:02,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1475368568, now seen corresponding path program 25 times [2020-10-13 10:59:02,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:02,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399945770] [2020-10-13 10:59:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:02,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:02,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:03,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:07,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:07,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 10:59:07,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:07,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 10:59:07,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:07,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:59:07,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-13 10:59:07,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:59:07,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:07,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:07,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:07,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:07,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:59:07,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:07,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:59:07,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:07,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:07,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:59:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:07,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:07,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:07,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:59:07,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:07,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:59:07,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:07,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:07,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:07,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:07,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:07,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 10:59:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:07,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:08,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:08,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:59:08,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:08,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-13 10:59:08,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:08,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:59:08,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:59:08,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:59:08,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 652 proven. 325 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-13 10:59:08,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399945770] [2020-10-13 10:59:08,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:08,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:59:08,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436347361] [2020-10-13 10:59:08,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:59:08,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:08,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:59:08,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:59:08,753 INFO L87 Difference]: Start difference. First operand 129 states and 151 transitions. Second operand 31 states.