/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:33:47,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:33:47,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:33:47,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:33:47,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:33:47,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:33:47,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:33:47,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:33:47,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:33:47,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:33:47,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:33:47,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:33:47,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:33:47,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:33:47,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:33:47,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:33:47,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:33:47,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:33:47,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:33:47,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:33:47,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:33:47,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:33:47,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:33:47,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:33:47,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:33:47,852 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:33:47,852 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:33:47,853 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:33:47,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:33:47,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:33:47,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:33:47,857 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:33:47,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:33:47,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:33:47,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:33:47,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:33:47,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:33:47,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:33:47,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:33:47,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:33:47,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:33:47,871 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:33:47,920 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:33:47,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:33:47,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:33:47,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:33:47,924 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:33:47,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:33:47,925 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:33:47,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:33:47,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:33:47,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:33:47,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:33:47,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:33:47,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:33:47,927 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:33:47,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:33:47,927 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:33:47,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:33:47,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:33:47,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:33:47,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:33:47,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:33:47,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:33:47,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:33:47,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:33:47,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:33:47,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:33:47,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:33:47,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:33:47,930 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:33:47,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:33:48,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:33:48,376 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:33:48,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:33:48,381 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:33:48,381 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:33:48,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label55.c [2020-10-27 19:33:48,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02663a945/399d04222e2b4cc6ab5c79fa103064c2/FLAG9be465895 [2020-10-27 19:33:49,775 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:33:49,776 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label55.c [2020-10-27 19:33:49,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02663a945/399d04222e2b4cc6ab5c79fa103064c2/FLAG9be465895 [2020-10-27 19:33:50,052 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02663a945/399d04222e2b4cc6ab5c79fa103064c2 [2020-10-27 19:33:50,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:33:50,066 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:33:50,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:33:50,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:33:50,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:33:50,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:33:50" (1/1) ... [2020-10-27 19:33:50,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@101aeede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:33:50, skipping insertion in model container [2020-10-27 19:33:50,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:33:50" (1/1) ... [2020-10-27 19:33:50,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:33:50,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:33:52,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:33:52,416 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:33:53,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:33:53,933 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:33:53,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:33:53 WrapperNode [2020-10-27 19:33:53,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:33:53,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:33:53,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:33:53,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:33:53,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:33:53" (1/1) ... [2020-10-27 19:33:53,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:33:53" (1/1) ... [2020-10-27 19:33:54,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:33:53" (1/1) ... [2020-10-27 19:33:54,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:33:53" (1/1) ... [2020-10-27 19:33:54,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:33:53" (1/1) ... [2020-10-27 19:33:54,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:33:53" (1/1) ... [2020-10-27 19:33:54,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:33:53" (1/1) ... [2020-10-27 19:33:54,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:33:54,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:33:54,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:33:54,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:33:54,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:33:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:33:54,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:33:54,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:33:54,581 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:33:54,581 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 19:33:54,581 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 19:33:54,582 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 19:33:54,582 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 19:33:54,582 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 19:33:54,582 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 19:33:54,582 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:33:54,582 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 19:33:54,583 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 19:33:54,583 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 19:33:54,583 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 19:33:54,583 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 19:33:54,583 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 19:33:54,584 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:33:54,584 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:33:54,584 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:33:54,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:33:54,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:33:54,584 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:33:54,585 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:33:54,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:33:54,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:33:54,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:33:54,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:33:54,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:33:54,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:34:10,905 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:34:10,906 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:34:10,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:34:10 BoogieIcfgContainer [2020-10-27 19:34:10,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:34:10,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:34:10,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:34:10,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:34:10,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:33:50" (1/3) ... [2020-10-27 19:34:10,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dec9fe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:34:10, skipping insertion in model container [2020-10-27 19:34:10,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:33:53" (2/3) ... [2020-10-27 19:34:10,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dec9fe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:34:10, skipping insertion in model container [2020-10-27 19:34:10,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:34:10" (3/3) ... [2020-10-27 19:34:10,923 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label55.c [2020-10-27 19:34:10,935 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:34:10,941 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:34:10,957 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:34:10,995 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:34:10,995 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:34:10,995 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:34:10,996 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:34:10,996 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:34:10,996 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:34:10,996 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:34:10,996 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:34:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 19:34:11,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 19:34:11,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:34:11,141 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] [2020-10-27 19:34:11,141 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:34:11,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:34:11,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2117600498, now seen corresponding path program 1 times [2020-10-27 19:34:11,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:34:11,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229886652] [2020-10-27 19:34:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:34:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:34:11,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:11,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:34:11,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 19:34:11,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:34:11,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-27 19:34:11,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:34:11,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:34:11,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:34:11,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 19:34:11,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:34:12,090 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:34:12,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:34:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:34:12,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:12,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:34:12,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:34:12,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:34:12,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 19:34:12,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:34:12,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:34:12,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:34:12,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:34:12,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:34:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:34:12,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229886652] [2020-10-27 19:34:12,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:34:12,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:34:12,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437055704] [2020-10-27 19:34:12,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:34:12,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:34:12,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:34:12,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:34:12,168 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 19:34:12,327 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 19:34:46,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:34:46,880 INFO L93 Difference]: Finished difference Result 5062 states and 9524 transitions. [2020-10-27 19:34:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:34:46,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 19:34:46,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:34:46,936 INFO L225 Difference]: With dead ends: 5062 [2020-10-27 19:34:46,936 INFO L226 Difference]: Without dead ends: 3201 [2020-10-27 19:34:46,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:34:46,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2020-10-27 19:34:47,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 3153. [2020-10-27 19:34:47,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3153 states. [2020-10-27 19:34:47,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 5020 transitions. [2020-10-27 19:34:47,171 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 5020 transitions. Word has length 21 [2020-10-27 19:34:47,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:34:47,172 INFO L481 AbstractCegarLoop]: Abstraction has 3153 states and 5020 transitions. [2020-10-27 19:34:47,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:34:47,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 5020 transitions. [2020-10-27 19:34:47,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 19:34:47,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:34:47,177 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:34:47,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:34:47,177 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:34:47,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:34:47,178 INFO L82 PathProgramCache]: Analyzing trace with hash -903930720, now seen corresponding path program 1 times [2020-10-27 19:34:47,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:34:47,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40674243] [2020-10-27 19:34:47,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:34:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:34:47,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:47,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:47,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:47,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:48,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:34:48,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 19:34:48,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:34:48,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1634 [2020-10-27 19:34:48,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:34:48,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:34:48,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 19:34:48,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:34:48,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:34:49,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:34:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:34:49,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:49,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:34:49,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:34:49,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:34:49,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 19:34:49,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:34:49,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:34:49,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:34:49,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:34:49,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:34:49,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:34:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:34:49,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:49,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:49,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:34:49,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 19:34:49,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:34:49,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-27 19:34:49,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:34:49,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:34:49,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-27 19:34:49,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:34:49,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:34:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:34:49,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40674243] [2020-10-27 19:34:49,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:34:49,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:34:49,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797679342] [2020-10-27 19:34:49,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:34:49,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:34:49,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:34:49,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:34:49,333 INFO L87 Difference]: Start difference. First operand 3153 states and 5020 transitions. Second operand 6 states. [2020-10-27 19:34:49,502 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:34:50,021 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:35:46,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:35:46,701 INFO L93 Difference]: Finished difference Result 12146 states and 19546 transitions. [2020-10-27 19:35:46,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:35:46,703 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 92 [2020-10-27 19:35:46,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:35:46,757 INFO L225 Difference]: With dead ends: 12146 [2020-10-27 19:35:46,757 INFO L226 Difference]: Without dead ends: 8999 [2020-10-27 19:35:46,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:35:46,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8999 states. [2020-10-27 19:35:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8999 to 8908. [2020-10-27 19:35:47,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8908 states. [2020-10-27 19:35:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8908 states to 8908 states and 12690 transitions. [2020-10-27 19:35:47,077 INFO L78 Accepts]: Start accepts. Automaton has 8908 states and 12690 transitions. Word has length 92 [2020-10-27 19:35:47,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:35:47,078 INFO L481 AbstractCegarLoop]: Abstraction has 8908 states and 12690 transitions. [2020-10-27 19:35:47,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:35:47,078 INFO L276 IsEmpty]: Start isEmpty. Operand 8908 states and 12690 transitions. [2020-10-27 19:35:47,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 19:35:47,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:35:47,090 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:35:47,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:35:47,090 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:35:47,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:35:47,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1721579170, now seen corresponding path program 1 times [2020-10-27 19:35:47,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:35:47,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265048725] [2020-10-27 19:35:47,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:35:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:35:47,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:35:47,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:35:48,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:35:48,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 19:35:48,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:35:48,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 973 [2020-10-27 19:35:48,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:35:48,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:35:48,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 19:35:48,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:35:48,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:35:48,356 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:35:48,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:35:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:35:48,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:35:48,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:35:48,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:35:48,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:35:48,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:35:48,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:35:48,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:35:48,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:35:48,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:35:48,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:35:48,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:35:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:35:48,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:35:48,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:35:48,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 19:35:48,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:35:48,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-27 19:35:48,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:35:48,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:35:48,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:35:48,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 19:35:48,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:35:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:35:48,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265048725] [2020-10-27 19:35:48,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:35:48,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:35:48,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349291398] [2020-10-27 19:35:48,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:35:48,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:35:48,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:35:48,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:35:48,584 INFO L87 Difference]: Start difference. First operand 8908 states and 12690 transitions. Second operand 6 states. [2020-10-27 19:35:48,765 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 19:35:49,318 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:36:57,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:36:57,957 INFO L93 Difference]: Finished difference Result 33299 states and 48949 transitions. [2020-10-27 19:36:57,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:36:57,960 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 92 [2020-10-27 19:36:57,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:36:58,084 INFO L225 Difference]: With dead ends: 33299 [2020-10-27 19:36:58,085 INFO L226 Difference]: Without dead ends: 24397 [2020-10-27 19:36:58,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:36:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24397 states. [2020-10-27 19:36:58,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24397 to 24372. [2020-10-27 19:36:58,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24372 states. [2020-10-27 19:36:58,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24372 states to 24372 states and 33256 transitions. [2020-10-27 19:36:58,754 INFO L78 Accepts]: Start accepts. Automaton has 24372 states and 33256 transitions. Word has length 92 [2020-10-27 19:36:58,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:36:58,755 INFO L481 AbstractCegarLoop]: Abstraction has 24372 states and 33256 transitions. [2020-10-27 19:36:58,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:36:58,757 INFO L276 IsEmpty]: Start isEmpty. Operand 24372 states and 33256 transitions. [2020-10-27 19:36:58,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 19:36:58,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:36:58,763 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:36:58,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:36:58,763 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:36:58,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:36:58,764 INFO L82 PathProgramCache]: Analyzing trace with hash 282815095, now seen corresponding path program 1 times [2020-10-27 19:36:58,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:36:58,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298492450] [2020-10-27 19:36:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:36:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:36:58,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:36:59,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:36:59,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:36:59,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 19:36:59,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:36:59,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 826 [2020-10-27 19:36:59,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:36:59,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:36:59,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 130 [2020-10-27 19:36:59,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:36:59,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:36:59,865 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:36:59,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:36:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:36:59,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:36:59,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:36:59,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:36:59,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:36:59,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:36:59,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:36:59,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:36:59,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:36:59,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:36:59,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:36:59,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:36:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:36:59,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:37:00,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:37:00,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 19:37:00,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:37:00,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 19:37:00,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:37:00,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:37:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:37:00,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 19:37:00,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 19:37:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:37:00,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298492450] [2020-10-27 19:37:00,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:37:00,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:37:00,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202433499] [2020-10-27 19:37:00,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:37:00,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:37:00,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:37:00,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:37:00,192 INFO L87 Difference]: Start difference. First operand 24372 states and 33256 transitions. Second operand 6 states. [2020-10-27 19:37:00,879 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 19:37:01,362 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 66