/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/Problem13_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 07:15:44,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 07:15:44,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 07:15:45,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 07:15:45,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 07:15:45,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 07:15:45,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 07:15:45,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 07:15:45,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 07:15:45,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 07:15:45,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 07:15:45,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 07:15:45,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 07:15:45,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 07:15:45,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 07:15:45,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 07:15:45,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 07:15:45,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 07:15:45,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 07:15:45,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 07:15:45,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 07:15:45,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 07:15:45,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 07:15:45,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 07:15:45,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 07:15:45,079 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 07:15:45,080 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 07:15:45,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 07:15:45,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 07:15:45,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 07:15:45,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 07:15:45,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 07:15:45,085 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 07:15:45,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 07:15:45,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 07:15:45,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 07:15:45,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 07:15:45,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 07:15:45,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 07:15:45,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 07:15:45,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 07:15:45,094 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 [2020-10-29 07:15:45,124 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 07:15:45,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 07:15:45,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 07:15:45,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 07:15:45,126 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 07:15:45,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 07:15:45,127 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 07:15:45,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 07:15:45,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 07:15:45,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 07:15:45,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 07:15:45,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 07:15:45,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 07:15:45,131 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 07:15:45,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 07:15:45,131 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 07:15:45,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 07:15:45,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 07:15:45,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 07:15:45,132 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 07:15:45,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 07:15:45,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 07:15:45,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 07:15:45,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 07:15:45,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 07:15:45,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 07:15:45,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 07:15:45,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 07:15:45,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 07:15:45,147 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 07:15:45,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 07:15:45,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 07:15:45,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 07:15:45,637 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 07:15:45,638 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 07:15:45,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label25.c [2020-10-29 07:15:45,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3086acfcc/db4a2236c03b463d82c9d262b4ca8d92/FLAG72f36c6e1 [2020-10-29 07:15:46,912 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 07:15:46,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label25.c [2020-10-29 07:15:46,955 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3086acfcc/db4a2236c03b463d82c9d262b4ca8d92/FLAG72f36c6e1 [2020-10-29 07:15:47,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3086acfcc/db4a2236c03b463d82c9d262b4ca8d92 [2020-10-29 07:15:47,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 07:15:47,266 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 07:15:47,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 07:15:47,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 07:15:47,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 07:15:47,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 07:15:47" (1/1) ... [2020-10-29 07:15:47,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5439e076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:47, skipping insertion in model container [2020-10-29 07:15:47,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 07:15:47" (1/1) ... [2020-10-29 07:15:47,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 07:15:47,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 07:15:49,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 07:15:49,142 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 07:15:49,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 07:15:49,916 INFO L208 MainTranslator]: Completed translation [2020-10-29 07:15:49,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:49 WrapperNode [2020-10-29 07:15:49,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 07:15:49,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 07:15:49,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 07:15:49,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 07:15:49,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:49" (1/1) ... [2020-10-29 07:15:49,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:49" (1/1) ... [2020-10-29 07:15:50,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:49" (1/1) ... [2020-10-29 07:15:50,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:49" (1/1) ... [2020-10-29 07:15:50,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:49" (1/1) ... [2020-10-29 07:15:50,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:49" (1/1) ... [2020-10-29 07:15:50,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:49" (1/1) ... [2020-10-29 07:15:50,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 07:15:50,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 07:15:50,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 07:15:50,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 07:15:50,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:49" (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 [2020-10-29 07:15:50,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 07:15:50,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 07:15:50,516 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 07:15:50,516 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 07:15:50,516 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 07:15:50,516 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 07:15:50,517 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 07:15:50,517 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 07:15:50,517 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 07:15:50,517 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 07:15:50,517 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 07:15:50,517 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 07:15:50,518 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 07:15:50,518 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 07:15:50,518 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 07:15:50,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 07:15:50,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 07:15:50,518 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 07:15:50,519 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 07:15:50,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 07:15:50,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 07:15:50,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 07:15:50,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 07:15:50,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 07:15:50,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 07:16:01,037 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 07:16:01,038 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 07:16:01,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 07:16:01 BoogieIcfgContainer [2020-10-29 07:16:01,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 07:16:01,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 07:16:01,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 07:16:01,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 07:16:01,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 07:15:47" (1/3) ... [2020-10-29 07:16:01,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aab2095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 07:16:01, skipping insertion in model container [2020-10-29 07:16:01,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:15:49" (2/3) ... [2020-10-29 07:16:01,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aab2095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 07:16:01, skipping insertion in model container [2020-10-29 07:16:01,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 07:16:01" (3/3) ... [2020-10-29 07:16:01,061 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label25.c [2020-10-29 07:16:01,071 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 07:16:01,077 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 07:16:01,092 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 07:16:01,130 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 07:16:01,130 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 07:16:01,130 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 07:16:01,130 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 07:16:01,131 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 07:16:01,131 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 07:16:01,131 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 07:16:01,131 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 07:16:01,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-29 07:16:01,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 07:16:01,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:16:01,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:16:01,183 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:16:01,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:16:01,191 INFO L82 PathProgramCache]: Analyzing trace with hash 115769242, now seen corresponding path program 1 times [2020-10-29 07:16:01,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:16:01,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315906633] [2020-10-29 07:16:01,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:16:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:01,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:02,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:02,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 07:16:02,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:02,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 582 [2020-10-29 07:16:02,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:02,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:02,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:16:02,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:16:02,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 07:16:02,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 07:16:02,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:16:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:02,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:02,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:02,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:16:02,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:02,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 07:16:02,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:02,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:02,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:16:02,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:16:02,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:16:02,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:16:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:16:02,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315906633] [2020-10-29 07:16:02,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:16:02,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 07:16:02,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561808663] [2020-10-29 07:16:02,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 07:16:02,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:16:02,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 07:16:02,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 07:16:02,308 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-29 07:16:19,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:16:19,976 INFO L93 Difference]: Finished difference Result 3209 states and 5919 transitions. [2020-10-29 07:16:19,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 07:16:19,980 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-29 07:16:19,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:16:20,032 INFO L225 Difference]: With dead ends: 3209 [2020-10-29 07:16:20,033 INFO L226 Difference]: Without dead ends: 2007 [2020-10-29 07:16:20,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 07:16:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2020-10-29 07:16:20,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1921. [2020-10-29 07:16:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1921 states. [2020-10-29 07:16:20,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 3312 transitions. [2020-10-29 07:16:20,309 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 3312 transitions. Word has length 30 [2020-10-29 07:16:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:16:20,311 INFO L481 AbstractCegarLoop]: Abstraction has 1921 states and 3312 transitions. [2020-10-29 07:16:20,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 07:16:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 3312 transitions. [2020-10-29 07:16:20,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 07:16:20,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:16:20,323 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:16:20,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 07:16:20,324 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:16:20,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:16:20,327 INFO L82 PathProgramCache]: Analyzing trace with hash 186084158, now seen corresponding path program 1 times [2020-10-29 07:16:20,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:16:20,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178767652] [2020-10-29 07:16:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:16:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:20,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:20,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:21,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:22,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:22,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-29 07:16:22,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:16:22,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2102 [2020-10-29 07:16:22,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:22,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:22,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:16:22,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:16:22,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 07:16:22,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-29 07:16:22,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:16:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:22,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:22,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:22,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:16:22,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:22,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 07:16:22,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:22,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:22,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:16:22,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:16:22,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:16:22,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-29 07:16:22,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:16:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:22,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:22,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:22,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 07:16:22,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:22,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-29 07:16:22,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:22,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:22,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:16:22,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:16:22,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 07:16:22,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:16:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:16:23,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178767652] [2020-10-29 07:16:23,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:16:23,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:16:23,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534528916] [2020-10-29 07:16:23,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:16:23,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:16:23,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:16:23,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:16:23,063 INFO L87 Difference]: Start difference. First operand 1921 states and 3312 transitions. Second operand 7 states. [2020-10-29 07:16:47,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:16:47,028 INFO L93 Difference]: Finished difference Result 5758 states and 9956 transitions. [2020-10-29 07:16:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 07:16:47,035 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-10-29 07:16:47,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:16:47,065 INFO L225 Difference]: With dead ends: 5758 [2020-10-29 07:16:47,065 INFO L226 Difference]: Without dead ends: 3843 [2020-10-29 07:16:47,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-29 07:16:47,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3843 states. [2020-10-29 07:16:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3843 to 3776. [2020-10-29 07:16:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3776 states. [2020-10-29 07:16:47,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3776 states to 3776 states and 5935 transitions. [2020-10-29 07:16:47,255 INFO L78 Accepts]: Start accepts. Automaton has 3776 states and 5935 transitions. Word has length 99 [2020-10-29 07:16:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:16:47,256 INFO L481 AbstractCegarLoop]: Abstraction has 3776 states and 5935 transitions. [2020-10-29 07:16:47,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:16:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3776 states and 5935 transitions. [2020-10-29 07:16:47,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-29 07:16:47,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:16:47,268 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:16:47,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 07:16:47,269 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:16:47,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:16:47,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1532067334, now seen corresponding path program 1 times [2020-10-29 07:16:47,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:16:47,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457750785] [2020-10-29 07:16:47,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:16:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:47,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:47,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:48,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:48,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-29 07:16:48,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:16:48,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1249 [2020-10-29 07:16:48,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:48,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:48,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:16:48,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:16:48,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 07:16:48,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 07:16:48,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:16:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:48,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:48,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:48,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:16:48,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:48,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 07:16:48,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:48,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:48,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:16:48,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:16:48,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:16:48,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:16:48,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:16:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:48,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:48,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:48,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 07:16:48,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:48,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-29 07:16:48,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:48,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:48,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:16:48,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:16:48,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 07:16:48,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:16:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:16:49,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457750785] [2020-10-29 07:16:49,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:16:49,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:16:49,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407198186] [2020-10-29 07:16:49,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:16:49,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:16:49,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:16:49,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:16:49,114 INFO L87 Difference]: Start difference. First operand 3776 states and 5935 transitions. Second operand 7 states. [2020-10-29 07:17:25,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:17:25,959 INFO L93 Difference]: Finished difference Result 11293 states and 18246 transitions. [2020-10-29 07:17:25,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 07:17:25,964 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 101 [2020-10-29 07:17:25,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:17:26,024 INFO L225 Difference]: With dead ends: 11293 [2020-10-29 07:17:26,024 INFO L226 Difference]: Without dead ends: 7523 [2020-10-29 07:17:26,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:17:26,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7523 states. [2020-10-29 07:17:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7523 to 7317. [2020-10-29 07:17:26,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7317 states. [2020-10-29 07:17:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7317 states to 7317 states and 10692 transitions. [2020-10-29 07:17:26,381 INFO L78 Accepts]: Start accepts. Automaton has 7317 states and 10692 transitions. Word has length 101 [2020-10-29 07:17:26,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:17:26,381 INFO L481 AbstractCegarLoop]: Abstraction has 7317 states and 10692 transitions. [2020-10-29 07:17:26,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:17:26,382 INFO L276 IsEmpty]: Start isEmpty. Operand 7317 states and 10692 transitions. [2020-10-29 07:17:26,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-29 07:17:26,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:17:26,387 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:17:26,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 07:17:26,388 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:17:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:17:26,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1554619586, now seen corresponding path program 1 times [2020-10-29 07:17:26,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:17:26,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80100747] [2020-10-29 07:17:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:17:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:26,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:26,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:26,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:27,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:27,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:27,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-29 07:17:27,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 07:17:27,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1344 [2020-10-29 07:17:27,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:27,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:27,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:17:27,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:17:27,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-29 07:17:27,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:17:27,940 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 07:17:27,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:17:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:27,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:27,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:27,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:17:27,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:27,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 07:17:27,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:27,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:27,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:17:27,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:17:27,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:17:27,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:17:28,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:17:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:28,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:28,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:28,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 07:17:28,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:28,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-29 07:17:28,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:28,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:28,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:17:28,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:17:28,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 07:17:28,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:17:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:17:28,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80100747] [2020-10-29 07:17:28,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:17:28,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:17:28,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074902848] [2020-10-29 07:17:28,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:17:28,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:17:28,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:17:28,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:17:28,397 INFO L87 Difference]: Start difference. First operand 7317 states and 10692 transitions. Second operand 7 states. [2020-10-29 07:17:56,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:17:56,936 INFO L93 Difference]: Finished difference Result 18348 states and 26668 transitions. [2020-10-29 07:17:56,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 07:17:56,945 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 106 [2020-10-29 07:17:56,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:17:57,010 INFO L225 Difference]: With dead ends: 18348 [2020-10-29 07:17:57,010 INFO L226 Difference]: Without dead ends: 11037 [2020-10-29 07:17:57,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-29 07:17:57,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11037 states. [2020-10-29 07:17:57,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11037 to 10822. [2020-10-29 07:17:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10822 states. [2020-10-29 07:17:57,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10822 states to 10822 states and 15009 transitions. [2020-10-29 07:17:57,417 INFO L78 Accepts]: Start accepts. Automaton has 10822 states and 15009 transitions. Word has length 106 [2020-10-29 07:17:57,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:17:57,418 INFO L481 AbstractCegarLoop]: Abstraction has 10822 states and 15009 transitions. [2020-10-29 07:17:57,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:17:57,418 INFO L276 IsEmpty]: Start isEmpty. Operand 10822 states and 15009 transitions. [2020-10-29 07:17:57,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-29 07:17:57,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:17:57,419 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:17:57,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 07:17:57,420 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:17:57,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:17:57,421 INFO L82 PathProgramCache]: Analyzing trace with hash 612115566, now seen corresponding path program 1 times [2020-10-29 07:17:57,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:17:57,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99718711] [2020-10-29 07:17:57,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:17:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:57,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:57,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:57,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:59,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:59,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-29 07:17:59,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:17:59,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1781 [2020-10-29 07:17:59,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:59,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:59,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:17:59,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:17:59,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-29 07:17:59,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:17:59,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:17:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:59,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:59,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:59,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:17:59,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:59,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 07:17:59,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:59,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:59,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:17:59,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:17:59,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:17:59,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:17:59,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:17:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:59,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:59,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:59,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 07:17:59,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:59,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-29 07:17:59,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:59,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:59,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:17:59,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:17:59,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-29 07:17:59,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:17:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:17:59,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99718711] [2020-10-29 07:17:59,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:17:59,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:17:59,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588567460] [2020-10-29 07:17:59,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:17:59,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:17:59,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:17:59,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:17:59,803 INFO L87 Difference]: Start difference. First operand 10822 states and 15009 transitions. Second operand 7 states. [2020-10-29 07:17:59,955 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 07:18:28,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:18:28,279 INFO L93 Difference]: Finished difference Result 32048 states and 47092 transitions. [2020-10-29 07:18:28,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 07:18:28,281 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2020-10-29 07:18:28,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:18:28,408 INFO L225 Difference]: With dead ends: 32048 [2020-10-29 07:18:28,408 INFO L226 Difference]: Without dead ends: 21232 [2020-10-29 07:18:28,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:18:28,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21232 states. [2020-10-29 07:18:29,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21232 to 20750. [2020-10-29 07:18:29,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20750 states. [2020-10-29 07:18:29,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20750 states to 20750 states and 27459 transitions. [2020-10-29 07:18:29,148 INFO L78 Accepts]: Start accepts. Automaton has 20750 states and 27459 transitions. Word has length 107 [2020-10-29 07:18:29,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:18:29,148 INFO L481 AbstractCegarLoop]: Abstraction has 20750 states and 27459 transitions. [2020-10-29 07:18:29,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:18:29,148 INFO L276 IsEmpty]: Start isEmpty. Operand 20750 states and 27459 transitions. [2020-10-29 07:18:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-29 07:18:29,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:18:29,152 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:18:29,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 07:18:29,152 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:18:29,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:18:29,153 INFO L82 PathProgramCache]: Analyzing trace with hash 890658298, now seen corresponding path program 1 times [2020-10-29 07:18:29,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:18:29,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693705414] [2020-10-29 07:18:29,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:18:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:18:29,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:18:29,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:18:29,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:18:34,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:18:34,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-29 07:18:34,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:18:34,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 07:18:34,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:18:34,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:18:34,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:18:34,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:18:34,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-29 07:18:34,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:18:34,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:18:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:18:34,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:18:34,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:18:34,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:18:34,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:18:34,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 07:18:34,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:18:34,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:18:34,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:18:34,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:18:34,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:18:34,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:18:34,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:18:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:18:34,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:18:34,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:18:34,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 07:18:34,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:18:34,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-29 07:18:34,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:18:34,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:18:34,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:18:34,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:18:34,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-29 07:18:34,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:18:34,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-29 07:18:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:18:34,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:18:34,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:18:34,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 07:18:34,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:18:34,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-29 07:18:34,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:18:34,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:18:34,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:18:34,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-29 07:18:34,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:18:34,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:18:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 44 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-29 07:18:35,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693705414] [2020-10-29 07:18:35,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:18:35,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 07:18:35,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969010619] [2020-10-29 07:18:35,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:18:35,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:18:35,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:18:35,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:18:35,165 INFO L87 Difference]: Start difference. First operand 20750 states and 27459 transitions. Second operand 7 states. [2020-10-29 07:19:03,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:19:03,189 INFO L93 Difference]: Finished difference Result 41334 states and 55323 transitions. [2020-10-29 07:19:03,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 07:19:03,191 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 200 [2020-10-29 07:19:03,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:19:03,276 INFO L225 Difference]: With dead ends: 41334 [2020-10-29 07:19:03,276 INFO L226 Difference]: Without dead ends: 21393 [2020-10-29 07:19:03,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-29 07:19:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21393 states. [2020-10-29 07:19:03,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21393 to 20928. [2020-10-29 07:19:03,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20928 states. [2020-10-29 07:19:03,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20928 states to 20928 states and 27810 transitions. [2020-10-29 07:19:03,917 INFO L78 Accepts]: Start accepts. Automaton has 20928 states and 27810 transitions. Word has length 200 [2020-10-29 07:19:03,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:19:03,918 INFO L481 AbstractCegarLoop]: Abstraction has 20928 states and 27810 transitions. [2020-10-29 07:19:03,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:19:03,918 INFO L276 IsEmpty]: Start isEmpty. Operand 20928 states and 27810 transitions. [2020-10-29 07:19:03,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-29 07:19:03,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:19:03,923 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:19:03,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 07:19:03,923 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:19:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:19:03,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1313225713, now seen corresponding path program 1 times [2020-10-29 07:19:03,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:19:03,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133228494] [2020-10-29 07:19:03,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:19:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:19:04,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:19:04,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:19:05,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:19:05,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-29 07:19:05,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:19:05,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1016 [2020-10-29 07:19:05,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:19:05,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:19:05,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:19:05,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-29 07:19:05,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-29 07:19:05,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:19:05,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:19:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:19:05,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:19:05,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:19:05,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:19:05,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:19:05,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 07:19:05,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:19:05,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:19:05,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:19:05,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:19:05,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:19:05,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:19:05,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:19:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:19:05,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:19:05,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:19:05,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-29 07:19:05,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:19:05,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-29 07:19:05,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:19:05,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:19:05,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:19:05,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:19:05,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-29 07:19:05,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:19:05,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-29 07:19:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:19:05,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:19:05,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:19:05,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 07:19:05,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:19:05,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-29 07:19:05,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:19:05,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:19:05,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:19:05,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:19:05,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-29 07:19:05,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:19:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 07:19:05,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133228494] [2020-10-29 07:19:05,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:19:05,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 07:19:05,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030953367] [2020-10-29 07:19:05,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:19:05,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:19:05,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:19:05,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:19:05,741 INFO L87 Difference]: Start difference. First operand 20928 states and 27810 transitions. Second operand 7 states. [2020-10-29 07:19:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:19:42,246 INFO L93 Difference]: Finished difference Result 51212 states and 73015 transitions. [2020-10-29 07:19:42,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 07:19:42,249 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 207 [2020-10-29 07:19:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:19:42,370 INFO L225 Difference]: With dead ends: 51212 [2020-10-29 07:19:42,370 INFO L226 Difference]: Without dead ends: 31093 [2020-10-29 07:19:42,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:19:42,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31093 states. [2020-10-29 07:19:43,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31093 to 30668. [2020-10-29 07:19:43,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30668 states. [2020-10-29 07:19:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30668 states to 30668 states and 40632 transitions. [2020-10-29 07:19:43,420 INFO L78 Accepts]: Start accepts. Automaton has 30668 states and 40632 transitions. Word has length 207 [2020-10-29 07:19:43,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:19:43,422 INFO L481 AbstractCegarLoop]: Abstraction has 30668 states and 40632 transitions. [2020-10-29 07:19:43,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:19:43,422 INFO L276 IsEmpty]: Start isEmpty. Operand 30668 states and 40632 transitions. [2020-10-29 07:19:43,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-29 07:19:43,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:19:43,437 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:19:43,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 07:19:43,437 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:19:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:19:43,438 INFO L82 PathProgramCache]: Analyzing trace with hash -914568215, now seen corresponding path program 1 times [2020-10-29 07:19:43,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:19:43,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772741146] [2020-10-29 07:19:43,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:19:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat