/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/Problem12_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 12:14:48,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 12:14:48,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 12:14:48,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 12:14:48,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 12:14:49,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 12:14:49,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 12:14:49,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 12:14:49,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 12:14:49,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 12:14:49,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 12:14:49,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 12:14:49,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 12:14:49,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 12:14:49,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 12:14:49,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 12:14:49,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 12:14:49,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 12:14:49,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 12:14:49,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 12:14:49,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 12:14:49,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 12:14:49,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 12:14:49,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 12:14:49,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 12:14:49,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 12:14:49,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 12:14:49,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 12:14:49,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 12:14:49,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 12:14:49,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 12:14:49,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 12:14:49,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 12:14:49,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 12:14:49,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 12:14:49,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 12:14:49,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 12:14:49,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 12:14:49,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 12:14:49,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 12:14:49,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 12:14:49,133 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 [2020-10-28 12:14:49,189 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 12:14:49,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 12:14:49,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 12:14:49,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 12:14:49,195 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 12:14:49,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 12:14:49,196 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 12:14:49,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 12:14:49,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 12:14:49,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 12:14:49,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 12:14:49,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 12:14:49,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 12:14:49,198 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 12:14:49,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 12:14:49,199 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 12:14:49,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 12:14:49,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 12:14:49,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 12:14:49,200 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 12:14:49,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 12:14:49,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 12:14:49,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 12:14:49,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 12:14:49,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 12:14:49,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 12:14:49,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 12:14:49,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 12:14:49,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 12:14:49,202 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 12:14:49,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 12:14:49,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 12:14:49,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 12:14:49,692 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 12:14:49,693 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 12:14:49,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label11.c [2020-10-28 12:14:49,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6959900a/035f71f7e8034617b35dff3b693d27ea/FLAG0ad3f4de1 [2020-10-28 12:14:50,802 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 12:14:50,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label11.c [2020-10-28 12:14:50,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6959900a/035f71f7e8034617b35dff3b693d27ea/FLAG0ad3f4de1 [2020-10-28 12:14:51,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6959900a/035f71f7e8034617b35dff3b693d27ea [2020-10-28 12:14:51,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 12:14:51,254 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 12:14:51,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 12:14:51,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 12:14:51,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 12:14:51,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:14:51" (1/1) ... [2020-10-28 12:14:51,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41b8afaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:51, skipping insertion in model container [2020-10-28 12:14:51,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:14:51" (1/1) ... [2020-10-28 12:14:51,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 12:14:51,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 12:14:52,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:14:52,892 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 12:14:53,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:14:53,681 INFO L208 MainTranslator]: Completed translation [2020-10-28 12:14:53,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:53 WrapperNode [2020-10-28 12:14:53,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 12:14:53,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 12:14:53,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 12:14:53,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 12:14:53,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:53" (1/1) ... [2020-10-28 12:14:53,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:53" (1/1) ... [2020-10-28 12:14:53,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:53" (1/1) ... [2020-10-28 12:14:53,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:53" (1/1) ... [2020-10-28 12:14:53,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:53" (1/1) ... [2020-10-28 12:14:53,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:53" (1/1) ... [2020-10-28 12:14:53,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:53" (1/1) ... [2020-10-28 12:14:54,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 12:14:54,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 12:14:54,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 12:14:54,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 12:14:54,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:53" (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 [2020-10-28 12:14:54,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 12:14:54,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 12:14:54,141 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 12:14:54,142 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 12:14:54,142 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 12:14:54,142 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 12:14:54,142 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 12:14:54,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 12:14:54,142 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 12:14:54,143 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 12:14:54,143 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 12:14:54,143 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 12:14:54,143 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 12:14:54,143 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 12:14:54,144 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 12:14:54,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 12:14:54,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 12:14:54,144 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 12:14:54,144 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 12:14:54,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 12:14:54,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 12:14:54,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 12:14:54,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 12:14:54,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 12:14:54,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 12:15:01,290 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 12:15:01,290 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 12:15:01,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:15:01 BoogieIcfgContainer [2020-10-28 12:15:01,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 12:15:01,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 12:15:01,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 12:15:01,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 12:15:01,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:14:51" (1/3) ... [2020-10-28 12:15:01,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292fbb77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:15:01, skipping insertion in model container [2020-10-28 12:15:01,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:53" (2/3) ... [2020-10-28 12:15:01,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292fbb77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:15:01, skipping insertion in model container [2020-10-28 12:15:01,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:15:01" (3/3) ... [2020-10-28 12:15:01,304 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label11.c [2020-10-28 12:15:01,316 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 12:15:01,325 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 12:15:01,338 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 12:15:01,376 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 12:15:01,377 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 12:15:01,377 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 12:15:01,377 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 12:15:01,377 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 12:15:01,377 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 12:15:01,377 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 12:15:01,377 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 12:15:01,416 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-28 12:15:01,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 12:15:01,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:15:01,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:15:01,427 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:15:01,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:15:01,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1005932524, now seen corresponding path program 1 times [2020-10-28 12:15:01,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:15:01,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058276586] [2020-10-28 12:15:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:15:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:15:01,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:15:02,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:15:02,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 12:15:02,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:15:02,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 572 [2020-10-28 12:15:02,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:15:02,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:15:02,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:15:02,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:15:02,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 12:15:02,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:15:02,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:15:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:15:02,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:15:02,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:15:02,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:15:02,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:15:02,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 12:15:02,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:15:02,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:15:02,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:15:02,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:15:02,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:15:02,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:15:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:15:02,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058276586] [2020-10-28 12:15:02,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:15:02,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 12:15:02,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192302534] [2020-10-28 12:15:02,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 12:15:02,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:15:02,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 12:15:02,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 12:15:02,533 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 4 states. [2020-10-28 12:15:02,746 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:15:13,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:15:13,791 INFO L93 Difference]: Finished difference Result 2476 states and 4742 transitions. [2020-10-28 12:15:13,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:15:13,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-28 12:15:13,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:15:13,833 INFO L225 Difference]: With dead ends: 2476 [2020-10-28 12:15:13,834 INFO L226 Difference]: Without dead ends: 1569 [2020-10-28 12:15:13,849 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 [2020-10-28 12:15:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-28 12:15:14,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1554. [2020-10-28 12:15:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2020-10-28 12:15:14,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2726 transitions. [2020-10-28 12:15:14,035 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2726 transitions. Word has length 46 [2020-10-28 12:15:14,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:15:14,037 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 2726 transitions. [2020-10-28 12:15:14,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 12:15:14,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2726 transitions. [2020-10-28 12:15:14,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 12:15:14,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:15:14,046 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, 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] [2020-10-28 12:15:14,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 12:15:14,047 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:15:14,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:15:14,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1926682114, now seen corresponding path program 1 times [2020-10-28 12:15:14,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:15:14,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566223727] [2020-10-28 12:15:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:15:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:15:14,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:15:14,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:15:15,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:15:15,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:15:15,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 12:15:15,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:15:15,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1748 [2020-10-28 12:15:15,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:15:15,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:15:15,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:15:15,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:15:15,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 12:15:15,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 12:15:16,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:15:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:15:16,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:15:16,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:15:16,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:15:16,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:15:16,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 12:15:16,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:15:16,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:15:16,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:15:16,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:15:16,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:15:16,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:15:16,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:15:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:15:16,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:15:16,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:15:16,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 12:15:16,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:15:16,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-28 12:15:16,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:15:16,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:15:16,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:15:16,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:15:16,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 12:15:16,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:15:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:15:16,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566223727] [2020-10-28 12:15:16,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:15:16,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:15:16,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921433846] [2020-10-28 12:15:16,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:15:16,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:15:16,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:15:16,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:15:16,339 INFO L87 Difference]: Start difference. First operand 1554 states and 2726 transitions. Second operand 7 states. [2020-10-28 12:15:30,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:15:30,652 INFO L93 Difference]: Finished difference Result 4767 states and 8402 transitions. [2020-10-28 12:15:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:15:30,653 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 115 [2020-10-28 12:15:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:15:30,677 INFO L225 Difference]: With dead ends: 4767 [2020-10-28 12:15:30,677 INFO L226 Difference]: Without dead ends: 3219 [2020-10-28 12:15:30,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:15:30,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2020-10-28 12:15:30,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3151. [2020-10-28 12:15:30,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3151 states. [2020-10-28 12:15:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3151 states to 3151 states and 4849 transitions. [2020-10-28 12:15:30,816 INFO L78 Accepts]: Start accepts. Automaton has 3151 states and 4849 transitions. Word has length 115 [2020-10-28 12:15:30,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:15:30,817 INFO L481 AbstractCegarLoop]: Abstraction has 3151 states and 4849 transitions. [2020-10-28 12:15:30,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:15:30,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3151 states and 4849 transitions. [2020-10-28 12:15:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 12:15:30,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:15:30,820 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, 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] [2020-10-28 12:15:30,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 12:15:30,820 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:15:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:15:30,821 INFO L82 PathProgramCache]: Analyzing trace with hash 215966258, now seen corresponding path program 1 times [2020-10-28 12:15:30,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:15:30,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590726050] [2020-10-28 12:15:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:15:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:15:30,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:15:31,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:15:31,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:15:31,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 12:15:31,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:15:31,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-28 12:15:31,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:15:31,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:15:31,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:15:31,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 12:15:31,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 12:15:31,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:15:31,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:15:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:15:31,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:15:31,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:15:31,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:15:31,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:15:31,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 12:15:31,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:15:31,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:15:31,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:15:31,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:15:31,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:15:31,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:15:31,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:15:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:15:31,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:15:31,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:15:31,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 12:15:31,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:15:31,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 12:15:31,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:15:31,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:15:31,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:15:31,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:15:31,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 12:15:31,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:15:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:15:31,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590726050] [2020-10-28 12:15:31,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:15:31,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 12:15:31,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160369007] [2020-10-28 12:15:31,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 12:15:31,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:15:31,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 12:15:31,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:15:31,681 INFO L87 Difference]: Start difference. First operand 3151 states and 4849 transitions. Second operand 6 states. [2020-10-28 12:15:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:15:49,145 INFO L93 Difference]: Finished difference Result 7896 states and 12640 transitions. [2020-10-28 12:15:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 12:15:49,146 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2020-10-28 12:15:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:15:49,174 INFO L225 Difference]: With dead ends: 7896 [2020-10-28 12:15:49,174 INFO L226 Difference]: Without dead ends: 4751 [2020-10-28 12:15:49,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:15:49,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2020-10-28 12:15:49,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 4728. [2020-10-28 12:15:49,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4728 states. [2020-10-28 12:15:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 6949 transitions. [2020-10-28 12:15:49,329 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 6949 transitions. Word has length 121 [2020-10-28 12:15:49,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:15:49,330 INFO L481 AbstractCegarLoop]: Abstraction has 4728 states and 6949 transitions. [2020-10-28 12:15:49,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 12:15:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 6949 transitions. [2020-10-28 12:15:49,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-28 12:15:49,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:15:49,333 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, 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, 1] [2020-10-28 12:15:49,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 12:15:49,334 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:15:49,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:15:49,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1349636808, now seen corresponding path program 1 times [2020-10-28 12:15:49,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:15:49,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762906429] [2020-10-28 12:15:49,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:15:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:15:49,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:15:49,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:15:50,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:15:50,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:15:50,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-28 12:15:50,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:15:50,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1240 [2020-10-28 12:15:50,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:15:50,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:15:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:15:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:15:50,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-28 12:15:50,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:15:50,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:15:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:15:50,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:15:50,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:15:50,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:15:50,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:15:50,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 12:15:50,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:15:50,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:15:50,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:15:50,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:15:50,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:15:50,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:15:50,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:15:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:15:50,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:15:50,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:15:50,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 12:15:50,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:15:50,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-28 12:15:50,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:15:50,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:15:50,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:15:50,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:15:50,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:15:50,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:15:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:15:51,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762906429] [2020-10-28 12:15:51,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:15:51,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:15:51,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019752305] [2020-10-28 12:15:51,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:15:51,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:15:51,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:15:51,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:15:51,118 INFO L87 Difference]: Start difference. First operand 4728 states and 6949 transitions. Second operand 7 states. [2020-10-28 12:16:07,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:16:07,992 INFO L93 Difference]: Finished difference Result 14570 states and 22145 transitions. [2020-10-28 12:16:07,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:16:07,994 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 140 [2020-10-28 12:16:07,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:16:08,064 INFO L225 Difference]: With dead ends: 14570 [2020-10-28 12:16:08,065 INFO L226 Difference]: Without dead ends: 9848 [2020-10-28 12:16:08,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:16:08,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2020-10-28 12:16:08,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9686. [2020-10-28 12:16:08,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9686 states. [2020-10-28 12:16:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9686 states to 9686 states and 13515 transitions. [2020-10-28 12:16:08,470 INFO L78 Accepts]: Start accepts. Automaton has 9686 states and 13515 transitions. Word has length 140 [2020-10-28 12:16:08,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:16:08,472 INFO L481 AbstractCegarLoop]: Abstraction has 9686 states and 13515 transitions. [2020-10-28 12:16:08,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:16:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 9686 states and 13515 transitions. [2020-10-28 12:16:08,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 12:16:08,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:16:08,481 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:16:08,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 12:16:08,482 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:16:08,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:16:08,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1007667322, now seen corresponding path program 1 times [2020-10-28 12:16:08,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:16:08,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117629484] [2020-10-28 12:16:08,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:16:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:16:08,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:16:08,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:16:09,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:16:09,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 12:16:09,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:16:09,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 905 [2020-10-28 12:16:09,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:16:09,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:16:09,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:16:09,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:16:09,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-28 12:16:09,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:16:09,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:16:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:16:09,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:16:09,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:16:09,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:16:09,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:16:09,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 12:16:09,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:16:09,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:16:09,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:16:09,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:16:09,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:16:09,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:16:09,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:16:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:16:09,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:16:09,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:16:09,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 12:16:09,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:16:09,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-28 12:16:09,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:16:09,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:16:09,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:16:09,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:16:09,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 12:16:09,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:16:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:16:09,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117629484] [2020-10-28 12:16:09,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:16:09,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:16:09,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049785175] [2020-10-28 12:16:09,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:16:09,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:16:09,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:16:09,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:16:09,946 INFO L87 Difference]: Start difference. First operand 9686 states and 13515 transitions. Second operand 7 states. [2020-10-28 12:16:29,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:16:29,878 INFO L93 Difference]: Finished difference Result 29922 states and 44316 transitions. [2020-10-28 12:16:29,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:16:29,880 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 149 [2020-10-28 12:16:29,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:16:29,977 INFO L225 Difference]: With dead ends: 29922 [2020-10-28 12:16:29,977 INFO L226 Difference]: Without dead ends: 20242 [2020-10-28 12:16:30,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:16:30,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20242 states. [2020-10-28 12:16:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20242 to 19856. [2020-10-28 12:16:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19856 states. [2020-10-28 12:16:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19856 states to 19856 states and 26543 transitions. [2020-10-28 12:16:30,692 INFO L78 Accepts]: Start accepts. Automaton has 19856 states and 26543 transitions. Word has length 149 [2020-10-28 12:16:30,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:16:30,693 INFO L481 AbstractCegarLoop]: Abstraction has 19856 states and 26543 transitions. [2020-10-28 12:16:30,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:16:30,693 INFO L276 IsEmpty]: Start isEmpty. Operand 19856 states and 26543 transitions. [2020-10-28 12:16:30,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-28 12:16:30,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:16:30,699 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:16:30,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 12:16:30,700 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:16:30,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:16:30,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1709217190, now seen corresponding path program 1 times [2020-10-28 12:16:30,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:16:30,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609278881] [2020-10-28 12:16:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:16:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:16:30,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:16:30,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:16:31,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:16:32,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:16:32,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-28 12:16:32,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:16:32,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1634 [2020-10-28 12:16:32,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:16:32,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:16:32,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:16:32,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 12:16:32,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-28 12:16:32,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:16:32,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:16:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:16:32,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:16:32,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:16:32,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:16:32,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:16:32,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 12:16:32,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:16:32,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:16:32,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:16:32,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:16:32,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:16:32,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:16:32,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:16:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:16:32,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:16:32,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:16:32,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 12:16:32,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:16:32,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-28 12:16:32,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:16:32,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:16:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:16:32,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:16:32,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 12:16:32,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:16:32,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 12:16:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:16:32,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:16:33,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:16:33,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 12:16:33,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:16:33,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-28 12:16:33,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:16:33,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:16:33,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:16:33,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:16:33,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 12:16:33,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 12:16:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:16:33,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609278881] [2020-10-28 12:16:33,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:16:33,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:16:33,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773878342] [2020-10-28 12:16:33,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:16:33,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:16:33,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:16:33,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:16:33,320 INFO L87 Difference]: Start difference. First operand 19856 states and 26543 transitions. Second operand 7 states. [2020-10-28 12:16:34,043 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:16:59,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:16:59,489 INFO L93 Difference]: Finished difference Result 57895 states and 85110 transitions. [2020-10-28 12:16:59,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:16:59,492 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 245 [2020-10-28 12:16:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:16:59,650 INFO L225 Difference]: With dead ends: 57895 [2020-10-28 12:16:59,651 INFO L226 Difference]: Without dead ends: 32320 [2020-10-28 12:16:59,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:16:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32320 states. [2020-10-28 12:17:00,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32320 to 30981. [2020-10-28 12:17:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30981 states. [2020-10-28 12:17:00,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30981 states to 30981 states and 38155 transitions. [2020-10-28 12:17:00,754 INFO L78 Accepts]: Start accepts. Automaton has 30981 states and 38155 transitions. Word has length 245 [2020-10-28 12:17:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:17:00,754 INFO L481 AbstractCegarLoop]: Abstraction has 30981 states and 38155 transitions. [2020-10-28 12:17:00,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:17:00,755 INFO L276 IsEmpty]: Start isEmpty. Operand 30981 states and 38155 transitions. [2020-10-28 12:17:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-10-28 12:17:00,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:17:00,762 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:17:00,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 12:17:00,763 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:17:00,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:17:00,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2123239832, now seen corresponding path program 1 times [2020-10-28 12:17:00,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:17:00,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722311792] [2020-10-28 12:17:00,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:17:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:17:00,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:17:01,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:17:01,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 308 [2020-10-28 12:17:01,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:17:01,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 955 [2020-10-28 12:17:01,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:17:01,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:17:01,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:17:01,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 260 [2020-10-28 12:17:01,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 12:17:01,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:17:02,007 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:17:02,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:17:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:17:02,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:17:02,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:17:02,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:17:02,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:17:02,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 12:17:02,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:17:02,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:17:02,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:17:02,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:17:02,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:17:02,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:17:02,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:17:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:17:02,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:17:02,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:17:02,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 12:17:02,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:17:02,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-28 12:17:02,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:17:02,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:17:02,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:17:02,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:17:02,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:17:02,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:17:02,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-28 12:17:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:17:02,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:17:02,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:17:02,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 12:17:02,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:17:02,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-28 12:17:02,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:17:02,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:17:02,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:17:02,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:17:02,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 12:17:02,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:17:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 12:17:02,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722311792] [2020-10-28 12:17:02,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:17:02,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:17:02,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313917288] [2020-10-28 12:17:02,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:17:02,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:17:02,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:17:02,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:17:02,520 INFO L87 Difference]: Start difference. First operand 30981 states and 38155 transitions. Second operand 5 states. [2020-10-28 12:17:04,062 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:17:21,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:17:21,352 INFO L93 Difference]: Finished difference Result 77604 states and 99311 transitions. [2020-10-28 12:17:21,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:17:21,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 294 [2020-10-28 12:17:21,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:17:21,550 INFO L225 Difference]: With dead ends: 77604 [2020-10-28 12:17:21,550 INFO L226 Difference]: Without dead ends: 47396 [2020-10-28 12:17:21,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:17:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47396 states. [2020-10-28 12:17:23,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47396 to 47369. [2020-10-28 12:17:23,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47369 states. [2020-10-28 12:17:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47369 states to 47369 states and 57294 transitions. [2020-10-28 12:17:23,138 INFO L78 Accepts]: Start accepts. Automaton has 47369 states and 57294 transitions. Word has length 294 [2020-10-28 12:17:23,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:17:23,139 INFO L481 AbstractCegarLoop]: Abstraction has 47369 states and 57294 transitions. [2020-10-28 12:17:23,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:17:23,139 INFO L276 IsEmpty]: Start isEmpty. Operand 47369 states and 57294 transitions. [2020-10-28 12:17:23,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-28 12:17:23,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:17:23,150 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, 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, 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] [2020-10-28 12:17:23,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 12:17:23,150 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:17:23,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:17:23,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1928513718, now seen corresponding path program 1 times [2020-10-28 12:17:23,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:17:23,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389158300] [2020-10-28 12:17:23,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:17:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:17:23,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:17:23,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:17:24,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:17:26,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:17:27,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:17:27,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-28 12:17:27,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:17:27,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3802 [2020-10-28 12:17:27,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:17:27,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:17:27,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:17:27,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-28 12:17:27,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-28 12:17:27,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:17:27,480 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:17:27,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:17:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:17:27,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:17:27,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:17:27,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:17:27,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:17:27,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 12:17:27,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:17:27,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:17:27,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:17:27,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:17:27,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:17:27,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:17:27,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:17:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:17:27,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:17:27,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:17:27,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 12:17:27,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:17:27,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-28 12:17:27,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:17:27,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:17:27,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:17:27,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:17:27,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-28 12:17:27,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:17:27,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-28 12:17:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:17:27,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:17:27,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:17:28,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:17:28,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 12:17:28,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:17:28,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-28 12:17:28,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:17:28,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:17:28,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:17:28,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:17:28,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-28 12:17:28,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:17:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-28 12:17:28,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389158300] [2020-10-28 12:17:28,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:17:28,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:17:28,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259590092] [2020-10-28 12:17:28,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:17:28,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:17:28,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:17:28,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:17:28,214 INFO L87 Difference]: Start difference. First operand 47369 states and 57294 transitions. Second operand 5 states. [2020-10-28 12:17:29,536 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 12:17:51,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:17:51,098 INFO L93 Difference]: Finished difference Result 111853 states and 139181 transitions. [2020-10-28 12:17:51,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:17:51,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-10-28 12:17:51,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:17:51,360 INFO L225 Difference]: With dead ends: 111853 [2020-10-28 12:17:51,361 INFO L226 Difference]: Without dead ends: 64488 [2020-10-28 12:17:51,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:17:51,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64488 states. [2020-10-28 12:17:53,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64488 to 63709. [2020-10-28 12:17:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63709 states. [2020-10-28 12:17:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63709 states to 63709 states and 79887 transitions. [2020-10-28 12:17:54,339 INFO L78 Accepts]: Start accepts. Automaton has 63709 states and 79887 transitions. Word has length 317 [2020-10-28 12:17:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:17:54,340 INFO L481 AbstractCegarLoop]: Abstraction has 63709 states and 79887 transitions. [2020-10-28 12:17:54,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:17:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 63709 states and 79887 transitions. [2020-10-28 12:17:54,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2020-10-28 12:17:54,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:17:54,362 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:17:54,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 12:17:54,363 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:17:54,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:17:54,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1848940835, now seen corresponding path program 1 times [2020-10-28 12:17:54,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:17:54,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69381653] [2020-10-28 12:17:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:17:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:17:54,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:17:54,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:17:55,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:17:59,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:17:59,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 378 [2020-10-28 12:17:59,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:17:59,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-28 12:17:59,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:17:59,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:17:59,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:17:59,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 327 [2020-10-28 12:17:59,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 12:17:59,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:17:59,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:17:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:17:59,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:17:59,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:17:59,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:17:59,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:17:59,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 12:17:59,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:17:59,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:17:59,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:17:59,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:17:59,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:17:59,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:17:59,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:17:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:17:59,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:00,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:00,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-28 12:18:00,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:18:00,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-28 12:18:00,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:00,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:00,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:18:00,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:18:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 312 [2020-10-28 12:18:00,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:18:00,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-28 12:18:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:00,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:00,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:00,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 12:18:00,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:18:00,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-28 12:18:00,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:00,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:00,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:18:00,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:18:00,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 12:18:00,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:18:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:18:00,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69381653] [2020-10-28 12:18:00,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:18:00,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:18:00,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662164328] [2020-10-28 12:18:00,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:18:00,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:18:00,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:18:00,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:18:00,523 INFO L87 Difference]: Start difference. First operand 63709 states and 79887 transitions. Second operand 5 states. [2020-10-28 12:18:01,633 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:18:21,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:18:21,953 INFO L93 Difference]: Finished difference Result 156929 states and 201199 transitions. [2020-10-28 12:18:21,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:18:21,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 364 [2020-10-28 12:18:21,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:18:22,191 INFO L225 Difference]: With dead ends: 156929 [2020-10-28 12:18:22,192 INFO L226 Difference]: Without dead ends: 93218 [2020-10-28 12:18:22,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:18:22,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93218 states. [2020-10-28 12:18:25,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93218 to 91681. [2020-10-28 12:18:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91681 states. [2020-10-28 12:18:25,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91681 states to 91681 states and 116716 transitions. [2020-10-28 12:18:25,542 INFO L78 Accepts]: Start accepts. Automaton has 91681 states and 116716 transitions. Word has length 364 [2020-10-28 12:18:25,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:18:25,544 INFO L481 AbstractCegarLoop]: Abstraction has 91681 states and 116716 transitions. [2020-10-28 12:18:25,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:18:25,544 INFO L276 IsEmpty]: Start isEmpty. Operand 91681 states and 116716 transitions. [2020-10-28 12:18:25,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-10-28 12:18:25,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:18:25,592 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-10-28 12:18:25,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 12:18:25,593 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:18:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:18:25,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1842679274, now seen corresponding path program 1 times [2020-10-28 12:18:25,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:18:25,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271384448] [2020-10-28 12:18:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:18:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:25,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:25,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:28,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:28,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking...