/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:18:47,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:18:47,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:18:47,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:18:47,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:18:47,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:18:47,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:18:47,509 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:18:47,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:18:47,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:18:47,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:18:47,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:18:47,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:18:47,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:18:47,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:18:47,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:18:47,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:18:47,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:18:47,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:18:47,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:18:47,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:18:47,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:18:47,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:18:47,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:18:47,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:18:47,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:18:47,542 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:18:47,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:18:47,543 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:18:47,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:18:47,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:18:47,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:18:47,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:18:47,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:18:47,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:18:47,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:18:47,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:18:47,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:18:47,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:18:47,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:18:47,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:18:47,553 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 18:18:47,580 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:18:47,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:18:47,582 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:18:47,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:18:47,582 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:18:47,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:18:47,583 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:18:47,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:18:47,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:18:47,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:18:47,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:18:47,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:18:47,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:18:47,584 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:18:47,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:18:47,585 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:18:47,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:18:47,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:18:47,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:18:47,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:18:47,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:18:47,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:18:47,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:18:47,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:18:47,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:18:47,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:18:47,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:18:47,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:18:47,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:18:47,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:18:48,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:18:48,057 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:18:48,061 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:18:48,066 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:18:48,067 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:18:48,068 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-09-24 18:18:48,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/490c662b1/a8ed287cce3d4b0696f438d05a15d03a/FLAG659d4a44e [2020-09-24 18:18:48,759 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:18:48,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-09-24 18:18:48,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/490c662b1/a8ed287cce3d4b0696f438d05a15d03a/FLAG659d4a44e [2020-09-24 18:18:49,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/490c662b1/a8ed287cce3d4b0696f438d05a15d03a [2020-09-24 18:18:49,052 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:18:49,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:18:49,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:18:49,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:18:49,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:18:49,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:18:49" (1/1) ... [2020-09-24 18:18:49,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a4d3d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:49, skipping insertion in model container [2020-09-24 18:18:49,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:18:49" (1/1) ... [2020-09-24 18:18:49,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:18:49,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:18:49,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:18:49,664 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:18:49,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:18:49,821 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:18:49,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:49 WrapperNode [2020-09-24 18:18:49,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:18:49,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:18:49,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:18:49,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:18:49,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:49" (1/1) ... [2020-09-24 18:18:49,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:49" (1/1) ... [2020-09-24 18:18:49,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:49" (1/1) ... [2020-09-24 18:18:49,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:49" (1/1) ... [2020-09-24 18:18:49,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:49" (1/1) ... [2020-09-24 18:18:49,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:49" (1/1) ... [2020-09-24 18:18:49,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:49" (1/1) ... [2020-09-24 18:18:49,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:18:49,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:18:49,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:18:49,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:18:49,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:18:49,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:18:49,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:18:49,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-24 18:18:49,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-24 18:18:49,995 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-24 18:18:49,995 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:18:49,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:18:49,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:18:49,997 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 18:18:49,997 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 18:18:49,998 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 18:18:49,998 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 18:18:49,998 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 18:18:49,998 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 18:18:49,998 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 18:18:49,999 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 18:18:49,999 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 18:18:50,000 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 18:18:50,000 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 18:18:50,000 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 18:18:50,001 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 18:18:50,001 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 18:18:50,002 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 18:18:50,002 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 18:18:50,004 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-24 18:18:50,004 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-24 18:18:50,004 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 18:18:50,004 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 18:18:50,004 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 18:18:50,005 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 18:18:50,005 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 18:18:50,005 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 18:18:50,005 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 18:18:50,005 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 18:18:50,005 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 18:18:50,006 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 18:18:50,006 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 18:18:50,006 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 18:18:50,006 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 18:18:50,006 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 18:18:50,006 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 18:18:50,007 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 18:18:50,007 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 18:18:50,007 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 18:18:50,007 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 18:18:50,007 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 18:18:50,007 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 18:18:50,008 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 18:18:50,008 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 18:18:50,008 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 18:18:50,008 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 18:18:50,008 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 18:18:50,009 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 18:18:50,009 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 18:18:50,009 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 18:18:50,009 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 18:18:50,010 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 18:18:50,010 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 18:18:50,011 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 18:18:50,011 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 18:18:50,011 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 18:18:50,011 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 18:18:50,011 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 18:18:50,011 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 18:18:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-24 18:18:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 18:18:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 18:18:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 18:18:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 18:18:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 18:18:50,014 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 18:18:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 18:18:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 18:18:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 18:18:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 18:18:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 18:18:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 18:18:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 18:18:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 18:18:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 18:18:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 18:18:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 18:18:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 18:18:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 18:18:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 18:18:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 18:18:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 18:18:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 18:18:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 18:18:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 18:18:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 18:18:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 18:18:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 18:18:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 18:18:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 18:18:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 18:18:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 18:18:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 18:18:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 18:18:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 18:18:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 18:18:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 18:18:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 18:18:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 18:18:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 18:18:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 18:18:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 18:18:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 18:18:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 18:18:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 18:18:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 18:18:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 18:18:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 18:18:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-24 18:18:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:18:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 18:18:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 18:18:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 18:18:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 18:18:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 18:18:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 18:18:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:18:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:18:50,374 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-24 18:18:50,793 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:18:50,793 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-24 18:18:50,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:18:50 BoogieIcfgContainer [2020-09-24 18:18:50,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:18:50,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:18:50,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:18:50,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:18:50,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:18:49" (1/3) ... [2020-09-24 18:18:50,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3dc857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:18:50, skipping insertion in model container [2020-09-24 18:18:50,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:18:49" (2/3) ... [2020-09-24 18:18:50,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3dc857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:18:50, skipping insertion in model container [2020-09-24 18:18:50,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:18:50" (3/3) ... [2020-09-24 18:18:50,811 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-09-24 18:18:50,823 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:18:50,834 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:18:50,856 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:18:50,891 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:18:50,891 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:18:50,891 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:18:50,891 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:18:50,892 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:18:50,892 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:18:50,892 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:18:50,892 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:18:50,921 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states. [2020-09-24 18:18:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 18:18:50,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:18:50,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:18:50,936 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:18:50,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:18:50,945 INFO L82 PathProgramCache]: Analyzing trace with hash -652445128, now seen corresponding path program 1 times [2020-09-24 18:18:50,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:18:50,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679694872] [2020-09-24 18:18:50,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:18:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:51,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:51,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:51,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:51,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:51,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:51,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:51,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:52,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:52,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 18:18:52,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 18:18:52,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 934 [2020-09-24 18:18:52,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:52,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:18:52,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-24 18:18:52,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:18:52,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:18:52,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:18:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:52,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:52,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:52,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:18:52,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:52,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 18:18:52,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:52,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:18:52,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:18:52,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:18:52,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:18:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:18:52,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679694872] [2020-09-24 18:18:52,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:18:52,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 18:18:52,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645859772] [2020-09-24 18:18:52,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 18:18:52,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:18:52,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 18:18:52,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 18:18:52,199 INFO L87 Difference]: Start difference. First operand 177 states. Second operand 3 states. [2020-09-24 18:18:52,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:18:52,598 INFO L93 Difference]: Finished difference Result 342 states and 400 transitions. [2020-09-24 18:18:52,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 18:18:52,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-24 18:18:52,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:18:52,617 INFO L225 Difference]: With dead ends: 342 [2020-09-24 18:18:52,618 INFO L226 Difference]: Without dead ends: 166 [2020-09-24 18:18:52,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 18:18:52,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-24 18:18:52,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-09-24 18:18:52,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-24 18:18:52,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 183 transitions. [2020-09-24 18:18:52,690 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 183 transitions. Word has length 31 [2020-09-24 18:18:52,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:18:52,691 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 183 transitions. [2020-09-24 18:18:52,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 18:18:52,691 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 183 transitions. [2020-09-24 18:18:52,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 18:18:52,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:18:52,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:18:52,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:18:52,695 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:18:52,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:18:52,696 INFO L82 PathProgramCache]: Analyzing trace with hash 473660712, now seen corresponding path program 1 times [2020-09-24 18:18:52,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:18:52,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812789903] [2020-09-24 18:18:52,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:18:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:52,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:52,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:53,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:53,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 18:18:53,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:18:53,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-09-24 18:18:53,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:53,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:18:53,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 18:18:53,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 18:18:53,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:53,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:18:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:53,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:53,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:53,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:18:53,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:53,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 18:18:53,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:53,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:18:53,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:18:53,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:18:53,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:18:53,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812789903] [2020-09-24 18:18:53,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:18:53,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:18:53,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992519395] [2020-09-24 18:18:53,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:18:53,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:18:53,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:18:53,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:18:53,308 INFO L87 Difference]: Start difference. First operand 166 states and 183 transitions. Second operand 5 states. [2020-09-24 18:18:53,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:18:53,676 INFO L93 Difference]: Finished difference Result 251 states and 277 transitions. [2020-09-24 18:18:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:18:53,677 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-09-24 18:18:53,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:18:53,683 INFO L225 Difference]: With dead ends: 251 [2020-09-24 18:18:53,684 INFO L226 Difference]: Without dead ends: 201 [2020-09-24 18:18:53,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:18:53,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-24 18:18:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2020-09-24 18:18:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-24 18:18:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 222 transitions. [2020-09-24 18:18:53,718 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 222 transitions. Word has length 41 [2020-09-24 18:18:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:18:53,720 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 222 transitions. [2020-09-24 18:18:53,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:18:53,721 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 222 transitions. [2020-09-24 18:18:53,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-24 18:18:53,726 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:18:53,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:18:53,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:18:53,727 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:18:53,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:18:53,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1870874818, now seen corresponding path program 1 times [2020-09-24 18:18:53,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:18:53,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935391585] [2020-09-24 18:18:53,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:18:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:53,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:53,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:54,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:54,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:54,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-24 18:18:54,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:18:54,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 933 [2020-09-24 18:18:54,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:54,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:18:54,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-24 18:18:54,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 18:18:54,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:54,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:18:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:54,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:54,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:54,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:18:54,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:54,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:18:54,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:54,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:18:54,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:18:54,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:18:54,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:18:54,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935391585] [2020-09-24 18:18:54,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:18:54,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:18:54,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276676857] [2020-09-24 18:18:54,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:18:54,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:18:54,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:18:54,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:18:54,736 INFO L87 Difference]: Start difference. First operand 200 states and 222 transitions. Second operand 4 states. [2020-09-24 18:18:55,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:18:55,066 INFO L93 Difference]: Finished difference Result 321 states and 359 transitions. [2020-09-24 18:18:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 18:18:55,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-09-24 18:18:55,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:18:55,070 INFO L225 Difference]: With dead ends: 321 [2020-09-24 18:18:55,070 INFO L226 Difference]: Without dead ends: 202 [2020-09-24 18:18:55,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:18:55,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-24 18:18:55,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-09-24 18:18:55,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-09-24 18:18:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 224 transitions. [2020-09-24 18:18:55,104 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 224 transitions. Word has length 54 [2020-09-24 18:18:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:18:55,105 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 224 transitions. [2020-09-24 18:18:55,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:18:55,105 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 224 transitions. [2020-09-24 18:18:55,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 18:18:55,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:18:55,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:18:55,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:18:55,113 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:18:55,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:18:55,114 INFO L82 PathProgramCache]: Analyzing trace with hash 129316031, now seen corresponding path program 1 times [2020-09-24 18:18:55,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:18:55,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290088476] [2020-09-24 18:18:55,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:18:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:55,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:55,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:55,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-24 18:18:55,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:55,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-09-24 18:18:55,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:55,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:18:55,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 18:18:55,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 18:18:55,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:18:55,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:18:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:55,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:55,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:55,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:18:55,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:55,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:18:55,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:55,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:18:55,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:18:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:18:55,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:55,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:18:55,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290088476] [2020-09-24 18:18:55,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:18:55,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 18:18:55,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721920764] [2020-09-24 18:18:55,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:18:55,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:18:55,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:18:55,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:18:55,520 INFO L87 Difference]: Start difference. First operand 202 states and 224 transitions. Second operand 7 states. [2020-09-24 18:18:55,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:18:55,900 INFO L93 Difference]: Finished difference Result 279 states and 306 transitions. [2020-09-24 18:18:55,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 18:18:55,901 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-09-24 18:18:55,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:18:55,903 INFO L225 Difference]: With dead ends: 279 [2020-09-24 18:18:55,903 INFO L226 Difference]: Without dead ends: 273 [2020-09-24 18:18:55,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:18:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-09-24 18:18:55,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 215. [2020-09-24 18:18:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-09-24 18:18:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 240 transitions. [2020-09-24 18:18:55,915 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 240 transitions. Word has length 56 [2020-09-24 18:18:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:18:55,915 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 240 transitions. [2020-09-24 18:18:55,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:18:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 240 transitions. [2020-09-24 18:18:55,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 18:18:55,917 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:18:55,917 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:18:55,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:18:55,918 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:18:55,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:18:55,918 INFO L82 PathProgramCache]: Analyzing trace with hash 593034583, now seen corresponding path program 1 times [2020-09-24 18:18:55,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:18:55,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856565120] [2020-09-24 18:18:55,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:18:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:55,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:56,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:56,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 18:18:56,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:56,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-09-24 18:18:56,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:56,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:18:56,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 18:18:56,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 18:18:56,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:56,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:18:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:56,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:56,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:56,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:18:56,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:56,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:18:56,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:56,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:18:56,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:18:56,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:18:56,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:18:56,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856565120] [2020-09-24 18:18:56,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:18:56,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 18:18:56,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358150301] [2020-09-24 18:18:56,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:18:56,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:18:56,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:18:56,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:18:56,238 INFO L87 Difference]: Start difference. First operand 215 states and 240 transitions. Second operand 7 states. [2020-09-24 18:18:56,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:18:56,687 INFO L93 Difference]: Finished difference Result 282 states and 309 transitions. [2020-09-24 18:18:56,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 18:18:56,688 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-09-24 18:18:56,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:18:56,690 INFO L225 Difference]: With dead ends: 282 [2020-09-24 18:18:56,690 INFO L226 Difference]: Without dead ends: 267 [2020-09-24 18:18:56,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:18:56,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-09-24 18:18:56,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 212. [2020-09-24 18:18:56,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-09-24 18:18:56,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 236 transitions. [2020-09-24 18:18:56,705 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 236 transitions. Word has length 62 [2020-09-24 18:18:56,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:18:56,706 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 236 transitions. [2020-09-24 18:18:56,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:18:56,706 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 236 transitions. [2020-09-24 18:18:56,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 18:18:56,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:18:56,711 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:18:56,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:18:56,714 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:18:56,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:18:56,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1629716359, now seen corresponding path program 1 times [2020-09-24 18:18:56,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:18:56,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144130701] [2020-09-24 18:18:56,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:18:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:56,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:56,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:56,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 18:18:56,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:56,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-09-24 18:18:56,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:56,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:18:56,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 18:18:56,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 18:18:56,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:57,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:18:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:57,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:57,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:57,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:18:57,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:57,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:18:57,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:57,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:18:57,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:18:57,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:18:57,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:18:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:18:57,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144130701] [2020-09-24 18:18:57,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:18:57,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 18:18:57,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298494686] [2020-09-24 18:18:57,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:18:57,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:18:57,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:18:57,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:18:57,067 INFO L87 Difference]: Start difference. First operand 212 states and 236 transitions. Second operand 7 states. [2020-09-24 18:18:57,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:18:57,495 INFO L93 Difference]: Finished difference Result 264 states and 290 transitions. [2020-09-24 18:18:57,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 18:18:57,496 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-09-24 18:18:57,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:18:57,498 INFO L225 Difference]: With dead ends: 264 [2020-09-24 18:18:57,499 INFO L226 Difference]: Without dead ends: 240 [2020-09-24 18:18:57,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:18:57,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-24 18:18:57,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 207. [2020-09-24 18:18:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-09-24 18:18:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 230 transitions. [2020-09-24 18:18:57,507 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 230 transitions. Word has length 62 [2020-09-24 18:18:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:18:57,508 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 230 transitions. [2020-09-24 18:18:57,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:18:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 230 transitions. [2020-09-24 18:18:57,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 18:18:57,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:18:57,510 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:18:57,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 18:18:57,510 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:18:57,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:18:57,510 INFO L82 PathProgramCache]: Analyzing trace with hash 852438762, now seen corresponding path program 1 times [2020-09-24 18:18:57,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:18:57,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014090577] [2020-09-24 18:18:57,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:18:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:57,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:57,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:58,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:58,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 18:18:58,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:18:58,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1368 [2020-09-24 18:18:58,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:58,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 18:18:58,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 18:18:58,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 18:18:58,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:18:59,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:18:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:59,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:18:59,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:18:59,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:18:59,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:18:59,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:18:59,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:18:59,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:18:59,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:18:59,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:18:59,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:18:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:18:59,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014090577] [2020-09-24 18:18:59,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:18:59,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 18:18:59,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142437491] [2020-09-24 18:18:59,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 18:18:59,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:18:59,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 18:18:59,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:18:59,111 INFO L87 Difference]: Start difference. First operand 207 states and 230 transitions. Second operand 11 states. [2020-09-24 18:18:59,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:18:59,737 INFO L93 Difference]: Finished difference Result 288 states and 315 transitions. [2020-09-24 18:18:59,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 18:18:59,738 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-09-24 18:18:59,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:18:59,741 INFO L225 Difference]: With dead ends: 288 [2020-09-24 18:18:59,741 INFO L226 Difference]: Without dead ends: 282 [2020-09-24 18:18:59,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-09-24 18:18:59,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-24 18:18:59,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 226. [2020-09-24 18:18:59,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-09-24 18:18:59,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 251 transitions. [2020-09-24 18:18:59,750 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 251 transitions. Word has length 67 [2020-09-24 18:18:59,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:18:59,751 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 251 transitions. [2020-09-24 18:18:59,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 18:18:59,751 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 251 transitions. [2020-09-24 18:18:59,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 18:18:59,752 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:18:59,752 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:18:59,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 18:18:59,753 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:18:59,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:18:59,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1742912072, now seen corresponding path program 1 times [2020-09-24 18:18:59,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:18:59,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285846733] [2020-09-24 18:18:59,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:18:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:18:59,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:00,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:00,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:00,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 18:19:00,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:19:00,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 958 [2020-09-24 18:19:00,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:00,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 18:19:00,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 18:19:00,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 18:19:00,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:00,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:00,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:00,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:00,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:00,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:00,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:19:00,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:00,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:00,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:00,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:00,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:19:00,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285846733] [2020-09-24 18:19:00,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:19:00,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 18:19:00,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730358027] [2020-09-24 18:19:00,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 18:19:00,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:00,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 18:19:00,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:19:00,866 INFO L87 Difference]: Start difference. First operand 226 states and 251 transitions. Second operand 11 states. [2020-09-24 18:19:01,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:19:01,584 INFO L93 Difference]: Finished difference Result 304 states and 334 transitions. [2020-09-24 18:19:01,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 18:19:01,584 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-09-24 18:19:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:19:01,586 INFO L225 Difference]: With dead ends: 304 [2020-09-24 18:19:01,586 INFO L226 Difference]: Without dead ends: 298 [2020-09-24 18:19:01,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-09-24 18:19:01,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-09-24 18:19:01,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 238. [2020-09-24 18:19:01,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-09-24 18:19:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 264 transitions. [2020-09-24 18:19:01,599 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 264 transitions. Word has length 67 [2020-09-24 18:19:01,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:19:01,600 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 264 transitions. [2020-09-24 18:19:01,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 18:19:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 264 transitions. [2020-09-24 18:19:01,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 18:19:01,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:19:01,602 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:19:01,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 18:19:01,602 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:19:01,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:19:01,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1875154110, now seen corresponding path program 1 times [2020-09-24 18:19:01,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:19:01,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543037799] [2020-09-24 18:19:01,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:19:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:01,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:01,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:02,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:03,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:05,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:05,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 18:19:05,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 18:19:05,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3835 [2020-09-24 18:19:05,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:05,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 18:19:05,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 18:19:05,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 18:19:05,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:19:05,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:05,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:05,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:05,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:05,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:05,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:19:05,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:05,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:05,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:05,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:05,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:19:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:19:05,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543037799] [2020-09-24 18:19:05,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:19:05,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 18:19:05,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059952598] [2020-09-24 18:19:05,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 18:19:05,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:05,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 18:19:05,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:19:05,656 INFO L87 Difference]: Start difference. First operand 238 states and 264 transitions. Second operand 9 states. [2020-09-24 18:19:06,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:19:06,201 INFO L93 Difference]: Finished difference Result 305 states and 335 transitions. [2020-09-24 18:19:06,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:19:06,202 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73 [2020-09-24 18:19:06,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:19:06,204 INFO L225 Difference]: With dead ends: 305 [2020-09-24 18:19:06,204 INFO L226 Difference]: Without dead ends: 290 [2020-09-24 18:19:06,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-24 18:19:06,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-24 18:19:06,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 245. [2020-09-24 18:19:06,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-09-24 18:19:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 272 transitions. [2020-09-24 18:19:06,220 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 272 transitions. Word has length 73 [2020-09-24 18:19:06,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:19:06,220 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 272 transitions. [2020-09-24 18:19:06,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 18:19:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 272 transitions. [2020-09-24 18:19:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 18:19:06,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:19:06,224 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:19:06,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 18:19:06,225 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:19:06,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:19:06,225 INFO L82 PathProgramCache]: Analyzing trace with hash -838472334, now seen corresponding path program 1 times [2020-09-24 18:19:06,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:19:06,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105016533] [2020-09-24 18:19:06,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:19:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:06,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:06,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:06,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 18:19:06,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:06,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 710 [2020-09-24 18:19:06,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:06,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 18:19:06,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 18:19:06,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 18:19:06,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:07,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:07,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:07,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:07,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:07,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:07,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:19:07,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:07,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:07,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:07,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:07,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:19:07,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105016533] [2020-09-24 18:19:07,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:19:07,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 18:19:07,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54849503] [2020-09-24 18:19:07,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 18:19:07,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:07,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 18:19:07,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 18:19:07,235 INFO L87 Difference]: Start difference. First operand 245 states and 272 transitions. Second operand 16 states. [2020-09-24 18:19:08,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:19:08,561 INFO L93 Difference]: Finished difference Result 310 states and 340 transitions. [2020-09-24 18:19:08,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 18:19:08,562 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-09-24 18:19:08,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:19:08,565 INFO L225 Difference]: With dead ends: 310 [2020-09-24 18:19:08,565 INFO L226 Difference]: Without dead ends: 304 [2020-09-24 18:19:08,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-24 18:19:08,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-24 18:19:08,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 249. [2020-09-24 18:19:08,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-09-24 18:19:08,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 276 transitions. [2020-09-24 18:19:08,575 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 276 transitions. Word has length 73 [2020-09-24 18:19:08,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:19:08,576 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 276 transitions. [2020-09-24 18:19:08,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 18:19:08,576 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 276 transitions. [2020-09-24 18:19:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 18:19:08,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:19:08,577 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:19:08,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 18:19:08,578 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:19:08,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:19:08,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1654345840, now seen corresponding path program 1 times [2020-09-24 18:19:08,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:19:08,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372713315] [2020-09-24 18:19:08,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:19:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:08,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:09,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:09,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 18:19:09,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:09,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 718 [2020-09-24 18:19:09,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:09,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 18:19:09,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 18:19:09,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 18:19:09,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:09,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:09,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:09,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:09,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:09,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:09,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:19:09,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:09,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:09,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:09,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:09,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:19:09,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372713315] [2020-09-24 18:19:09,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:19:09,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 18:19:09,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704003981] [2020-09-24 18:19:09,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 18:19:09,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:09,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 18:19:09,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 18:19:09,617 INFO L87 Difference]: Start difference. First operand 249 states and 276 transitions. Second operand 16 states. [2020-09-24 18:19:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:19:11,140 INFO L93 Difference]: Finished difference Result 324 states and 354 transitions. [2020-09-24 18:19:11,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 18:19:11,141 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-09-24 18:19:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:19:11,143 INFO L225 Difference]: With dead ends: 324 [2020-09-24 18:19:11,143 INFO L226 Difference]: Without dead ends: 318 [2020-09-24 18:19:11,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-24 18:19:11,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-09-24 18:19:11,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 258. [2020-09-24 18:19:11,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-24 18:19:11,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 286 transitions. [2020-09-24 18:19:11,172 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 286 transitions. Word has length 73 [2020-09-24 18:19:11,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:19:11,172 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 286 transitions. [2020-09-24 18:19:11,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 18:19:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 286 transitions. [2020-09-24 18:19:11,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 18:19:11,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:19:11,174 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:19:11,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 18:19:11,174 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:19:11,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:19:11,175 INFO L82 PathProgramCache]: Analyzing trace with hash -617664064, now seen corresponding path program 1 times [2020-09-24 18:19:11,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:19:11,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075627014] [2020-09-24 18:19:11,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:19:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:11,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:11,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:12,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:12,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 18:19:12,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:19:12,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1216 [2020-09-24 18:19:12,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:12,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 18:19:12,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 18:19:12,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 18:19:12,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:12,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:12,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:12,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:12,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:12,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:12,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:19:12,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:12,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:12,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:12,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:12,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:19:12,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075627014] [2020-09-24 18:19:12,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:19:12,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 18:19:12,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591187716] [2020-09-24 18:19:12,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 18:19:12,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:12,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 18:19:12,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:19:12,551 INFO L87 Difference]: Start difference. First operand 258 states and 286 transitions. Second operand 9 states. [2020-09-24 18:19:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:19:13,057 INFO L93 Difference]: Finished difference Result 316 states and 346 transitions. [2020-09-24 18:19:13,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:19:13,058 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73 [2020-09-24 18:19:13,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:19:13,060 INFO L225 Difference]: With dead ends: 316 [2020-09-24 18:19:13,060 INFO L226 Difference]: Without dead ends: 297 [2020-09-24 18:19:13,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-24 18:19:13,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-09-24 18:19:13,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 258. [2020-09-24 18:19:13,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-24 18:19:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 285 transitions. [2020-09-24 18:19:13,070 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 285 transitions. Word has length 73 [2020-09-24 18:19:13,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:19:13,071 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 285 transitions. [2020-09-24 18:19:13,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 18:19:13,071 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 285 transitions. [2020-09-24 18:19:13,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 18:19:13,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:19:13,072 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:19:13,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 18:19:13,073 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:19:13,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:19:13,073 INFO L82 PathProgramCache]: Analyzing trace with hash 342604767, now seen corresponding path program 2 times [2020-09-24 18:19:13,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:19:13,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220983691] [2020-09-24 18:19:13,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:19:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:13,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:13,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:15,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:15,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 18:19:15,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:19:15,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2436 [2020-09-24 18:19:15,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:15,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 18:19:15,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 18:19:15,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 18:19:15,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:15,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:15,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:15,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:15,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:15,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:15,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:19:15,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:15,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:15,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:15,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:15,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:19:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:19:15,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220983691] [2020-09-24 18:19:15,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:19:15,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 18:19:15,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267849218] [2020-09-24 18:19:15,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 18:19:15,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:15,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 18:19:15,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-09-24 18:19:15,877 INFO L87 Difference]: Start difference. First operand 258 states and 285 transitions. Second operand 18 states. [2020-09-24 18:19:17,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:19:17,385 INFO L93 Difference]: Finished difference Result 352 states and 384 transitions. [2020-09-24 18:19:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 18:19:17,386 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2020-09-24 18:19:17,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:19:17,388 INFO L225 Difference]: With dead ends: 352 [2020-09-24 18:19:17,388 INFO L226 Difference]: Without dead ends: 346 [2020-09-24 18:19:17,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 18:19:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-09-24 18:19:17,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 272. [2020-09-24 18:19:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-09-24 18:19:17,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 300 transitions. [2020-09-24 18:19:17,401 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 300 transitions. Word has length 78 [2020-09-24 18:19:17,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:19:17,402 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 300 transitions. [2020-09-24 18:19:17,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 18:19:17,402 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 300 transitions. [2020-09-24 18:19:17,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 18:19:17,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:19:17,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:19:17,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 18:19:17,404 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:19:17,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:19:17,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1736898641, now seen corresponding path program 1 times [2020-09-24 18:19:17,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:19:17,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556094740] [2020-09-24 18:19:17,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:19:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:17,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:17,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:20,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:20,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 18:19:20,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:19:20,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3157 [2020-09-24 18:19:20,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:20,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 18:19:20,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 18:19:20,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 18:19:20,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:20,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:20,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:20,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:20,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:20,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:20,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:19:20,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:20,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:20,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:20,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:20,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:19:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:19:20,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556094740] [2020-09-24 18:19:20,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:19:20,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 18:19:20,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274504324] [2020-09-24 18:19:20,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 18:19:20,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:20,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 18:19:20,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-09-24 18:19:20,959 INFO L87 Difference]: Start difference. First operand 272 states and 300 transitions. Second operand 18 states. [2020-09-24 18:19:22,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:19:22,381 INFO L93 Difference]: Finished difference Result 378 states and 412 transitions. [2020-09-24 18:19:22,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 18:19:22,381 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2020-09-24 18:19:22,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:19:22,383 INFO L225 Difference]: With dead ends: 378 [2020-09-24 18:19:22,383 INFO L226 Difference]: Without dead ends: 372 [2020-09-24 18:19:22,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 18:19:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-09-24 18:19:22,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 284. [2020-09-24 18:19:22,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-09-24 18:19:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 313 transitions. [2020-09-24 18:19:22,395 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 313 transitions. Word has length 78 [2020-09-24 18:19:22,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:19:22,396 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 313 transitions. [2020-09-24 18:19:22,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 18:19:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 313 transitions. [2020-09-24 18:19:22,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 18:19:22,397 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:19:22,397 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:19:22,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 18:19:22,398 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:19:22,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:19:22,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1698374602, now seen corresponding path program 1 times [2020-09-24 18:19:22,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:19:22,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255902110] [2020-09-24 18:19:22,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:19:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:22,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:23,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:23,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-24 18:19:23,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:23,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 586 [2020-09-24 18:19:23,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:23,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 18:19:23,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 18:19:23,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 18:19:23,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:23,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:23,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:23,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:23,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:23,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:23,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:19:23,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:23,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:23,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:23,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:23,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:19:23,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255902110] [2020-09-24 18:19:23,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:19:23,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 18:19:23,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258232624] [2020-09-24 18:19:23,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 18:19:23,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:23,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 18:19:23,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 18:19:23,326 INFO L87 Difference]: Start difference. First operand 284 states and 313 transitions. Second operand 16 states. [2020-09-24 18:19:24,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:19:24,831 INFO L93 Difference]: Finished difference Result 350 states and 382 transitions. [2020-09-24 18:19:24,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 18:19:24,832 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-09-24 18:19:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:19:24,834 INFO L225 Difference]: With dead ends: 350 [2020-09-24 18:19:24,834 INFO L226 Difference]: Without dead ends: 335 [2020-09-24 18:19:24,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 18:19:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-09-24 18:19:24,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 286. [2020-09-24 18:19:24,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-09-24 18:19:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 315 transitions. [2020-09-24 18:19:24,853 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 315 transitions. Word has length 79 [2020-09-24 18:19:24,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:19:24,853 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 315 transitions. [2020-09-24 18:19:24,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 18:19:24,853 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 315 transitions. [2020-09-24 18:19:24,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 18:19:24,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:19:24,855 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:19:24,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 18:19:24,856 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:19:24,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:19:24,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1559910918, now seen corresponding path program 2 times [2020-09-24 18:19:24,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:19:24,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054146722] [2020-09-24 18:19:24,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:19:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:24,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:25,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:25,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-24 18:19:25,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:25,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-09-24 18:19:25,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:25,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 18:19:25,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 18:19:25,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 18:19:25,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:19:25,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:25,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:25,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:25,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:25,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:25,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 18:19:25,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:25,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:25,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:25,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:25,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 18:19:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:19:26,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054146722] [2020-09-24 18:19:26,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:19:26,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 18:19:26,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298691864] [2020-09-24 18:19:26,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 18:19:26,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:26,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 18:19:26,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-09-24 18:19:26,004 INFO L87 Difference]: Start difference. First operand 286 states and 315 transitions. Second operand 16 states. [2020-09-24 18:19:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:19:27,231 INFO L93 Difference]: Finished difference Result 330 states and 361 transitions. [2020-09-24 18:19:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 18:19:27,232 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-09-24 18:19:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:19:27,234 INFO L225 Difference]: With dead ends: 330 [2020-09-24 18:19:27,234 INFO L226 Difference]: Without dead ends: 300 [2020-09-24 18:19:27,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-09-24 18:19:27,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-09-24 18:19:27,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 275. [2020-09-24 18:19:27,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-09-24 18:19:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 303 transitions. [2020-09-24 18:19:27,259 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 303 transitions. Word has length 79 [2020-09-24 18:19:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:19:27,260 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 303 transitions. [2020-09-24 18:19:27,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 18:19:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 303 transitions. [2020-09-24 18:19:27,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 18:19:27,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:19:27,263 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:19:27,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 18:19:27,263 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:19:27,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:19:27,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1643861864, now seen corresponding path program 2 times [2020-09-24 18:19:27,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:19:27,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280831642] [2020-09-24 18:19:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:19:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:27,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:27,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:27,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-24 18:19:27,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:27,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-09-24 18:19:27,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:27,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 18:19:27,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 18:19:27,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 18:19:27,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:28,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:28,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:28,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:28,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:28,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:28,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:19:28,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:28,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:28,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:28,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:28,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:19:28,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280831642] [2020-09-24 18:19:28,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:19:28,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 18:19:28,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657207418] [2020-09-24 18:19:28,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 18:19:28,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:28,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 18:19:28,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 18:19:28,241 INFO L87 Difference]: Start difference. First operand 275 states and 303 transitions. Second operand 16 states. [2020-09-24 18:19:29,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:19:29,650 INFO L93 Difference]: Finished difference Result 314 states and 343 transitions. [2020-09-24 18:19:29,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 18:19:29,651 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-09-24 18:19:29,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:19:29,654 INFO L225 Difference]: With dead ends: 314 [2020-09-24 18:19:29,654 INFO L226 Difference]: Without dead ends: 288 [2020-09-24 18:19:29,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 18:19:29,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-09-24 18:19:29,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 261. [2020-09-24 18:19:29,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-09-24 18:19:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 288 transitions. [2020-09-24 18:19:29,663 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 288 transitions. Word has length 79 [2020-09-24 18:19:29,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:19:29,664 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 288 transitions. [2020-09-24 18:19:29,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 18:19:29,664 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 288 transitions. [2020-09-24 18:19:29,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-24 18:19:29,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:19:29,665 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:19:29,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 18:19:29,666 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:19:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:19:29,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1435872375, now seen corresponding path program 2 times [2020-09-24 18:19:29,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:19:29,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833453134] [2020-09-24 18:19:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:19:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:29,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:30,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:31,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:31,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-24 18:19:31,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:19:31,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2096 [2020-09-24 18:19:31,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:31,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 18:19:31,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 18:19:31,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 18:19:31,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:32,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:32,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:32,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:32,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:32,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:32,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:19:32,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:32,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:32,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:32,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:32,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:19:32,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833453134] [2020-09-24 18:19:32,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:19:32,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 18:19:32,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395819073] [2020-09-24 18:19:32,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 18:19:32,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:32,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 18:19:32,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-24 18:19:32,107 INFO L87 Difference]: Start difference. First operand 261 states and 288 transitions. Second operand 16 states. [2020-09-24 18:19:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:19:33,334 INFO L93 Difference]: Finished difference Result 339 states and 370 transitions. [2020-09-24 18:19:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 18:19:33,334 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 84 [2020-09-24 18:19:33,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:19:33,337 INFO L225 Difference]: With dead ends: 339 [2020-09-24 18:19:33,337 INFO L226 Difference]: Without dead ends: 324 [2020-09-24 18:19:33,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 18:19:33,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-09-24 18:19:33,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 279. [2020-09-24 18:19:33,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-09-24 18:19:33,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 307 transitions. [2020-09-24 18:19:33,356 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 307 transitions. Word has length 84 [2020-09-24 18:19:33,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:19:33,356 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 307 transitions. [2020-09-24 18:19:33,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 18:19:33,357 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 307 transitions. [2020-09-24 18:19:33,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-24 18:19:33,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:19:33,358 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:19:33,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 18:19:33,359 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:19:33,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:19:33,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1822413145, now seen corresponding path program 3 times [2020-09-24 18:19:33,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:19:33,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971029597] [2020-09-24 18:19:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:19:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:33,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:34,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:34,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-24 18:19:34,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:34,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1157 [2020-09-24 18:19:34,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:34,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 18:19:34,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 18:19:34,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 18:19:34,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:35,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:19:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:19:35,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:19:35,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:19:35,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:19:35,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:19:35,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:19:35,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:19:35,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:19:35,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:19:35,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:19:35,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:19:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:19:35,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971029597] [2020-09-24 18:19:35,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:19:35,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 18:19:35,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120881912] [2020-09-24 18:19:35,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 18:19:35,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:19:35,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 18:19:35,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2020-09-24 18:19:35,119 INFO L87 Difference]: Start difference. First operand 279 states and 307 transitions. Second operand 22 states. [2020-09-24 18:19:37,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:19:37,293 INFO L93 Difference]: Finished difference Result 352 states and 384 transitions. [2020-09-24 18:19:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-24 18:19:37,294 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 84 [2020-09-24 18:19:37,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:19:37,296 INFO L225 Difference]: With dead ends: 352 [2020-09-24 18:19:37,297 INFO L226 Difference]: Without dead ends: 339 [2020-09-24 18:19:37,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=372, Invalid=2078, Unknown=0, NotChecked=0, Total=2450 [2020-09-24 18:19:37,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-09-24 18:19:37,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 285. [2020-09-24 18:19:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-09-24 18:19:37,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 313 transitions. [2020-09-24 18:19:37,308 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 313 transitions. Word has length 84 [2020-09-24 18:19:37,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:19:37,308 INFO L479 AbstractCegarLoop]: Abstraction has 285 states and 313 transitions. [2020-09-24 18:19:37,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 18:19:37,308 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 313 transitions. [2020-09-24 18:19:37,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-24 18:19:37,309 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:19:37,310 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:19:37,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 18:19:37,310 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:19:37,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:19:37,310 INFO L82 PathProgramCache]: Analyzing trace with hash 752503657, now seen corresponding path program 1 times [2020-09-24 18:19:37,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:19:37,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751700563] [2020-09-24 18:19:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:19:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 18:19:37,337 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 18:19:37,337 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 18:19:37,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 18:19:37,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 06:19:37 BoogieIcfgContainer [2020-09-24 18:19:37,367 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------