/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_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 12:22:01,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 12:22:01,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 12:22:01,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 12:22:01,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 12:22:01,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 12:22:01,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 12:22:01,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 12:22:01,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 12:22:01,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 12:22:01,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 12:22:01,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 12:22:01,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 12:22:01,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 12:22:01,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 12:22:01,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 12:22:01,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 12:22:01,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 12:22:01,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 12:22:01,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 12:22:01,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 12:22:01,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 12:22:01,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 12:22:01,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 12:22:01,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 12:22:01,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 12:22:01,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 12:22:01,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 12:22:01,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 12:22:01,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 12:22:01,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 12:22:01,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 12:22:01,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 12:22:01,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 12:22:01,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 12:22:01,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 12:22:01,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 12:22:01,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 12:22:01,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 12:22:01,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 12:22:01,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 12:22:01,207 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 12:22:01,257 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 12:22:01,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 12:22:01,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 12:22:01,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 12:22:01,261 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 12:22:01,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 12:22:01,261 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 12:22:01,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 12:22:01,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 12:22:01,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 12:22:01,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 12:22:01,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 12:22:01,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 12:22:01,266 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 12:22:01,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 12:22:01,267 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 12:22:01,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 12:22:01,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 12:22:01,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 12:22:01,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 12:22:01,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 12:22:01,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 12:22:01,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 12:22:01,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 12:22:01,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 12:22:01,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 12:22:01,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 12:22:01,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 12:22:01,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 12:22:01,270 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 12:22:01,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 12:22:01,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 12:22:01,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 12:22:01,838 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 12:22:01,839 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 12:22:01,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label36.c [2020-10-28 12:22:01,936 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e412d7da9/6843132d66184dfcbdba138552da5623/FLAGf3f24f71b [2020-10-28 12:22:03,084 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 12:22:03,085 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label36.c [2020-10-28 12:22:03,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e412d7da9/6843132d66184dfcbdba138552da5623/FLAGf3f24f71b [2020-10-28 12:22:03,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e412d7da9/6843132d66184dfcbdba138552da5623 [2020-10-28 12:22:03,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 12:22:03,484 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 12:22:03,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 12:22:03,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 12:22:03,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 12:22:03,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:22:03" (1/1) ... [2020-10-28 12:22:03,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d821c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:03, skipping insertion in model container [2020-10-28 12:22:03,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:22:03" (1/1) ... [2020-10-28 12:22:03,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 12:22:03,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 12:22:05,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:22:05,297 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 12:22:06,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:22:06,115 INFO L208 MainTranslator]: Completed translation [2020-10-28 12:22:06,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:06 WrapperNode [2020-10-28 12:22:06,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 12:22:06,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 12:22:06,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 12:22:06,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 12:22:06,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:06" (1/1) ... [2020-10-28 12:22:06,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:06" (1/1) ... [2020-10-28 12:22:06,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:06" (1/1) ... [2020-10-28 12:22:06,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:06" (1/1) ... [2020-10-28 12:22:06,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:06" (1/1) ... [2020-10-28 12:22:06,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:06" (1/1) ... [2020-10-28 12:22:06,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:06" (1/1) ... [2020-10-28 12:22:06,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 12:22:06,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 12:22:06,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 12:22:06,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 12:22:06,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:06" (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 12:22:06,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 12:22:06,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 12:22:06,675 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 12:22:06,675 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 12:22:06,675 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 12:22:06,676 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 12:22:06,676 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 12:22:06,676 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 12:22:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 12:22:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 12:22:06,678 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 12:22:06,678 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 12:22:06,678 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 12:22:06,679 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 12:22:06,680 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 12:22:06,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 12:22:06,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 12:22:06,682 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 12:22:06,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 12:22:06,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 12:22:06,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 12:22:06,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 12:22:06,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 12:22:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 12:22:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 12:22:13,106 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 12:22:13,106 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 12:22:13,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:22:13 BoogieIcfgContainer [2020-10-28 12:22:13,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 12:22:13,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 12:22:13,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 12:22:13,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 12:22:13,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:22:03" (1/3) ... [2020-10-28 12:22:13,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebb1413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:22:13, skipping insertion in model container [2020-10-28 12:22:13,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:06" (2/3) ... [2020-10-28 12:22:13,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebb1413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:22:13, skipping insertion in model container [2020-10-28 12:22:13,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:22:13" (3/3) ... [2020-10-28 12:22:13,126 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label36.c [2020-10-28 12:22:13,140 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 12:22:13,146 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 12:22:13,161 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 12:22:13,214 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 12:22:13,214 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 12:22:13,214 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 12:22:13,214 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 12:22:13,214 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 12:22:13,215 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 12:22:13,215 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 12:22:13,215 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 12:22:13,272 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-28 12:22:13,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 12:22:13,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:22:13,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:22:13,287 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:22:13,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:22:13,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1943169372, now seen corresponding path program 1 times [2020-10-28 12:22:13,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:22:13,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536244367] [2020-10-28 12:22:13,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:22:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:22:13,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:14,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:22:14,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 12:22:14,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:22:14,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 653 [2020-10-28 12:22:14,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:22:14,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:22:14,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:22:14,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:22:14,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 12:22:14,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:22:14,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:22:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:22:14,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:14,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:22:14,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:22:14,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:22:14,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-28 12:22:14,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:22:14,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:22:14,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:22:14,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:22:14,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:22:14,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:22:14,530 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 12:22:14,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536244367] [2020-10-28 12:22:14,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:22:14,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 12:22:14,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508435918] [2020-10-28 12:22:14,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 12:22:14,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:22:14,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 12:22:14,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 12:22:14,569 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 4 states. [2020-10-28 12:22:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:22:26,401 INFO L93 Difference]: Finished difference Result 2476 states and 4742 transitions. [2020-10-28 12:22:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:22:26,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-28 12:22:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:22:26,435 INFO L225 Difference]: With dead ends: 2476 [2020-10-28 12:22:26,435 INFO L226 Difference]: Without dead ends: 1569 [2020-10-28 12:22:26,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:22:26,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-28 12:22:26,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1554. [2020-10-28 12:22:26,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2020-10-28 12:22:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2522 transitions. [2020-10-28 12:22:26,654 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2522 transitions. Word has length 64 [2020-10-28 12:22:26,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:22:26,657 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 2522 transitions. [2020-10-28 12:22:26,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 12:22:26,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2522 transitions. [2020-10-28 12:22:26,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-28 12:22:26,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:22:26,675 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, 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] [2020-10-28 12:22:26,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 12:22:26,676 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:22:26,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:22:26,678 INFO L82 PathProgramCache]: Analyzing trace with hash -353982758, now seen corresponding path program 1 times [2020-10-28 12:22:26,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:22:26,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742552434] [2020-10-28 12:22:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:22:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:22:26,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:26,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:27,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:22:27,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-28 12:22:27,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:22:27,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 888 [2020-10-28 12:22:27,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:22:27,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:22:27,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:22:27,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 12:22:27,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 12:22:27,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:22:27,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:22:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:22:27,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:27,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:22:27,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:22:27,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:22:27,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 12:22:27,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:22:27,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:22:27,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:22:27,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:22:27,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:22:27,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:22:27,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:22:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:22:27,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:27,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:22:27,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 12:22:27,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:22:27,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-28 12:22:27,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:22:27,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:22:27,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:22:27,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:22:27,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 12:22:27,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:22:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:22:28,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742552434] [2020-10-28 12:22:28,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:22:28,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:22:28,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995281376] [2020-10-28 12:22:28,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:22:28,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:22:28,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:22:28,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:22:28,057 INFO L87 Difference]: Start difference. First operand 1554 states and 2522 transitions. Second operand 5 states. [2020-10-28 12:22:39,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:22:39,841 INFO L93 Difference]: Finished difference Result 4674 states and 7651 transitions. [2020-10-28 12:22:39,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:22:39,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2020-10-28 12:22:39,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:22:39,862 INFO L225 Difference]: With dead ends: 4674 [2020-10-28 12:22:39,863 INFO L226 Difference]: Without dead ends: 3126 [2020-10-28 12:22:39,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:22:39,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2020-10-28 12:22:39,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 3110. [2020-10-28 12:22:39,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3110 states. [2020-10-28 12:22:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3110 states to 3110 states and 4248 transitions. [2020-10-28 12:22:39,970 INFO L78 Accepts]: Start accepts. Automaton has 3110 states and 4248 transitions. Word has length 139 [2020-10-28 12:22:39,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:22:39,971 INFO L481 AbstractCegarLoop]: Abstraction has 3110 states and 4248 transitions. [2020-10-28 12:22:39,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:22:39,971 INFO L276 IsEmpty]: Start isEmpty. Operand 3110 states and 4248 transitions. [2020-10-28 12:22:39,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-28 12:22:39,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:22:39,974 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, 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] [2020-10-28 12:22:39,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 12:22:39,974 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:22:39,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:22:39,975 INFO L82 PathProgramCache]: Analyzing trace with hash -566518592, now seen corresponding path program 1 times [2020-10-28 12:22:39,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:22:39,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922760373] [2020-10-28 12:22:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:22:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:22:40,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:40,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:41,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:22:41,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-28 12:22:41,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:22:41,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1062 [2020-10-28 12:22:41,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:22:41,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:22:41,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:22:41,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:22:41,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 12:22:41,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:22:41,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:22:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:22:41,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:41,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:22:41,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:22:41,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:22:41,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 12:22:41,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:22:41,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:22:41,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:22:41,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:22:41,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:22:41,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:22:41,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:22:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:22:41,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:41,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:22:41,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 12:22:41,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:22:41,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-28 12:22:41,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:22:41,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:22:41,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:22:41,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:22:41,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 12:22:41,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:22:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:22:41,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922760373] [2020-10-28 12:22:41,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:22:41,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:22:41,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735769872] [2020-10-28 12:22:41,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:22:41,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:22:41,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:22:41,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:22:41,564 INFO L87 Difference]: Start difference. First operand 3110 states and 4248 transitions. Second operand 7 states. [2020-10-28 12:22:56,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:22:56,020 INFO L93 Difference]: Finished difference Result 7906 states and 11337 transitions. [2020-10-28 12:22:56,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:22:56,021 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2020-10-28 12:22:56,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:22:56,053 INFO L225 Difference]: With dead ends: 7906 [2020-10-28 12:22:56,053 INFO L226 Difference]: Without dead ends: 4802 [2020-10-28 12:22:56,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:22:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4802 states. [2020-10-28 12:22:56,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4802 to 4738. [2020-10-28 12:22:56,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4738 states. [2020-10-28 12:22:56,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4738 states to 4738 states and 6198 transitions. [2020-10-28 12:22:56,229 INFO L78 Accepts]: Start accepts. Automaton has 4738 states and 6198 transitions. Word has length 142 [2020-10-28 12:22:56,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:22:56,233 INFO L481 AbstractCegarLoop]: Abstraction has 4738 states and 6198 transitions. [2020-10-28 12:22:56,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:22:56,235 INFO L276 IsEmpty]: Start isEmpty. Operand 4738 states and 6198 transitions. [2020-10-28 12:22:56,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-28 12:22:56,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:22:56,243 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, 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] [2020-10-28 12:22:56,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 12:22:56,244 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:22:56,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:22:56,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1001291522, now seen corresponding path program 1 times [2020-10-28 12:22:56,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:22:56,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238516704] [2020-10-28 12:22:56,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:22:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:22:56,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:56,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:57,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:22:57,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-28 12:22:57,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:22:57,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1054 [2020-10-28 12:22:57,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:22:57,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:22:57,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:22:57,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:22:57,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:22:57,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:22:57,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:22:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:22:57,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:57,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:22:57,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:22:57,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:22:57,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 12:22:57,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:22:57,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:22:57,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:22:57,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:22:57,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:22:57,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:22:57,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:22:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:22:57,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:22:57,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:22:57,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 12:22:57,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:22:57,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-28 12:22:57,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:22:57,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:22:57,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:22:57,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:22:57,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 12:22:57,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:22:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:22:57,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238516704] [2020-10-28 12:22:57,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:22:57,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 12:22:57,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728607864] [2020-10-28 12:22:57,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 12:22:57,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:22:57,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 12:22:57,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:22:57,846 INFO L87 Difference]: Start difference. First operand 4738 states and 6198 transitions. Second operand 8 states. [2020-10-28 12:23:13,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:23:13,688 INFO L93 Difference]: Finished difference Result 14507 states and 19740 transitions. [2020-10-28 12:23:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 12:23:13,690 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 153 [2020-10-28 12:23:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:23:13,746 INFO L225 Difference]: With dead ends: 14507 [2020-10-28 12:23:13,746 INFO L226 Difference]: Without dead ends: 9775 [2020-10-28 12:23:13,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 12:23:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9775 states. [2020-10-28 12:23:14,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9775 to 9672. [2020-10-28 12:23:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9672 states. [2020-10-28 12:23:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9672 states to 9672 states and 12863 transitions. [2020-10-28 12:23:14,053 INFO L78 Accepts]: Start accepts. Automaton has 9672 states and 12863 transitions. Word has length 153 [2020-10-28 12:23:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:23:14,053 INFO L481 AbstractCegarLoop]: Abstraction has 9672 states and 12863 transitions. [2020-10-28 12:23:14,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 12:23:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 9672 states and 12863 transitions. [2020-10-28 12:23:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-28 12:23:14,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:23:14,057 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:23:14,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 12:23:14,057 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:23:14,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:23:14,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1186986786, now seen corresponding path program 1 times [2020-10-28 12:23:14,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:23:14,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010929983] [2020-10-28 12:23:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:23:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:14,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:14,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:15,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:23:15,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-28 12:23:15,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:23:15,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1102 [2020-10-28 12:23:15,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:23:15,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:23:15,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:23:15,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:23:15,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-28 12:23:15,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:23:15,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:23:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:15,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:15,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:23:15,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:23:15,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:23:15,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 12:23:15,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:23:15,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:23:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:23:15,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:23:15,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:23:15,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 12:23:15,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:23:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:15,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:15,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:23:15,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 12:23:15,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:23:15,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-28 12:23:15,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:23:15,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:23:15,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:23:15,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:23:15,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 12:23:15,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 12:23:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:23:15,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010929983] [2020-10-28 12:23:15,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:23:15,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:23:15,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607405476] [2020-10-28 12:23:15,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:23:15,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:23:15,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:23:15,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:23:15,702 INFO L87 Difference]: Start difference. First operand 9672 states and 12863 transitions. Second operand 7 states. [2020-10-28 12:23:34,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:23:34,391 INFO L93 Difference]: Finished difference Result 27716 states and 38432 transitions. [2020-10-28 12:23:34,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:23:34,395 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 167 [2020-10-28 12:23:34,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:23:34,486 INFO L225 Difference]: With dead ends: 27716 [2020-10-28 12:23:34,487 INFO L226 Difference]: Without dead ends: 18050 [2020-10-28 12:23:34,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:23:34,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18050 states. [2020-10-28 12:23:35,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18050 to 17076. [2020-10-28 12:23:35,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17076 states. [2020-10-28 12:23:35,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17076 states to 17076 states and 22005 transitions. [2020-10-28 12:23:35,102 INFO L78 Accepts]: Start accepts. Automaton has 17076 states and 22005 transitions. Word has length 167 [2020-10-28 12:23:35,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:23:35,102 INFO L481 AbstractCegarLoop]: Abstraction has 17076 states and 22005 transitions. [2020-10-28 12:23:35,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:23:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 17076 states and 22005 transitions. [2020-10-28 12:23:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-28 12:23:35,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:23:35,107 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:23:35,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 12:23:35,108 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:23:35,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:23:35,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1165294090, now seen corresponding path program 1 times [2020-10-28 12:23:35,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:23:35,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923196427] [2020-10-28 12:23:35,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:23:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:35,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:35,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:35,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:35,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:38,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:39,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:23:39,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-28 12:23:39,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 12:23:39,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4784 [2020-10-28 12:23:39,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:23:39,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:23:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:23:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 12:23:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 12:23:39,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:23:40,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:23:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:40,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:40,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:23:40,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:23:40,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:23:40,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:23:40,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:23:40,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:23:40,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:23:40,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:23:40,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:23:40,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:23:40,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:23:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:40,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:40,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:23:40,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 12:23:40,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:23:40,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-28 12:23:40,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:23:40,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:23:40,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:23:40,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:23:40,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 12:23:40,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:23:40,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 12:23:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:40,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:40,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:23:40,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 12:23:40,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:23:40,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-28 12:23:40,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:23:40,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:23:40,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:23:40,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:23:40,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 12:23:40,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:23:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:23:40,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923196427] [2020-10-28 12:23:40,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:23:40,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:23:40,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999643728] [2020-10-28 12:23:40,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:23:40,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:23:40,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:23:40,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:23:40,554 INFO L87 Difference]: Start difference. First operand 17076 states and 22005 transitions. Second operand 7 states. [2020-10-28 12:23:58,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:23:58,662 INFO L93 Difference]: Finished difference Result 42700 states and 57453 transitions. [2020-10-28 12:23:58,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:23:58,665 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 211 [2020-10-28 12:23:58,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:23:58,768 INFO L225 Difference]: With dead ends: 42700 [2020-10-28 12:23:58,768 INFO L226 Difference]: Without dead ends: 25630 [2020-10-28 12:23:58,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:23:58,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25630 states. [2020-10-28 12:23:59,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25630 to 25422. [2020-10-28 12:23:59,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25422 states. [2020-10-28 12:23:59,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25422 states to 25422 states and 32572 transitions. [2020-10-28 12:23:59,585 INFO L78 Accepts]: Start accepts. Automaton has 25422 states and 32572 transitions. Word has length 211 [2020-10-28 12:23:59,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:23:59,586 INFO L481 AbstractCegarLoop]: Abstraction has 25422 states and 32572 transitions. [2020-10-28 12:23:59,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:23:59,586 INFO L276 IsEmpty]: Start isEmpty. Operand 25422 states and 32572 transitions. [2020-10-28 12:23:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-28 12:23:59,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:23:59,591 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, 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] [2020-10-28 12:23:59,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 12:23:59,591 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:23:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:23:59,593 INFO L82 PathProgramCache]: Analyzing trace with hash 167421556, now seen corresponding path program 1 times [2020-10-28 12:23:59,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:23:59,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129746575] [2020-10-28 12:23:59,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:23:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:23:59,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:23:59,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:01,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:01,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-28 12:24:01,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:24:01,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1821 [2020-10-28 12:24:01,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:01,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:01,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:24:01,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:24:01,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-28 12:24:01,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:24:01,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:24:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:01,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:01,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:01,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:24:01,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:24:01,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 12:24:01,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:01,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:01,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:24:01,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:24:01,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:24:01,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:24:01,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:24:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:01,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:02,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:02,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-28 12:24:02,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:24:02,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-28 12:24:02,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:02,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:02,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:24:02,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:24:02,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-28 12:24:02,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:24:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:24:02,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129746575] [2020-10-28 12:24:02,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:24:02,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:24:02,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885208427] [2020-10-28 12:24:02,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:24:02,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:24:02,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:24:02,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:24:02,426 INFO L87 Difference]: Start difference. First operand 25422 states and 32572 transitions. Second operand 7 states. [2020-10-28 12:24:02,575 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-28 12:24:17,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:24:17,882 INFO L93 Difference]: Finished difference Result 41090 states and 54018 transitions. [2020-10-28 12:24:17,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:24:17,885 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 212 [2020-10-28 12:24:17,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:24:17,980 INFO L225 Difference]: With dead ends: 41090 [2020-10-28 12:24:17,980 INFO L226 Difference]: Without dead ends: 26576 [2020-10-28 12:24:18,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:24:18,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26576 states. [2020-10-28 12:24:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26576 to 26303. [2020-10-28 12:24:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26303 states. [2020-10-28 12:24:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26303 states to 26303 states and 33681 transitions. [2020-10-28 12:24:18,833 INFO L78 Accepts]: Start accepts. Automaton has 26303 states and 33681 transitions. Word has length 212 [2020-10-28 12:24:18,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:24:18,834 INFO L481 AbstractCegarLoop]: Abstraction has 26303 states and 33681 transitions. [2020-10-28 12:24:18,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:24:18,834 INFO L276 IsEmpty]: Start isEmpty. Operand 26303 states and 33681 transitions. [2020-10-28 12:24:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-28 12:24:18,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:24:18,838 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, 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, 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 12:24:18,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 12:24:18,838 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:24:18,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:24:18,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1164745390, now seen corresponding path program 1 times [2020-10-28 12:24:18,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:24:18,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284652545] [2020-10-28 12:24:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:24:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:18,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:18,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:19,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:20,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:22,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:22,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-28 12:24:22,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:24:22,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3265 [2020-10-28 12:24:22,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:22,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:22,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:24:22,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 12:24:22,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-28 12:24:22,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:24:22,324 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:24:22,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:24:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:22,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:22,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:22,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:24:22,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:24:22,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:24:22,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:22,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:22,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:24:22,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:24:22,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:24:22,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:24:22,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:24:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:22,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:22,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:22,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 12:24:22,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:24:22,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-28 12:24:22,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:22,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:22,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:24:22,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:24:22,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 12:24:22,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:24:22,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 12:24:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:22,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:22,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:22,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 12:24:22,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:24:22,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-28 12:24:22,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:22,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:22,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:24:22,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:24:22,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 12:24:22,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:24:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 184 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:24:22,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284652545] [2020-10-28 12:24:22,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:24:22,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:24:22,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708215809] [2020-10-28 12:24:22,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:24:22,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:24:22,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:24:22,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:24:22,760 INFO L87 Difference]: Start difference. First operand 26303 states and 33681 transitions. Second operand 7 states. [2020-10-28 12:24:22,941 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:24:42,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:24:42,345 INFO L93 Difference]: Finished difference Result 56151 states and 77185 transitions. [2020-10-28 12:24:42,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 12:24:42,348 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 225 [2020-10-28 12:24:42,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:24:42,446 INFO L225 Difference]: With dead ends: 56151 [2020-10-28 12:24:42,447 INFO L226 Difference]: Without dead ends: 24882 [2020-10-28 12:24:42,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:24:42,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24882 states. [2020-10-28 12:24:43,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24882 to 23732. [2020-10-28 12:24:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23732 states. [2020-10-28 12:24:43,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23732 states to 23732 states and 29790 transitions. [2020-10-28 12:24:43,239 INFO L78 Accepts]: Start accepts. Automaton has 23732 states and 29790 transitions. Word has length 225 [2020-10-28 12:24:43,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:24:43,239 INFO L481 AbstractCegarLoop]: Abstraction has 23732 states and 29790 transitions. [2020-10-28 12:24:43,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:24:43,240 INFO L276 IsEmpty]: Start isEmpty. Operand 23732 states and 29790 transitions. [2020-10-28 12:24:43,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-28 12:24:43,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:24:43,246 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:24:43,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 12:24:43,247 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:24:43,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:24:43,395 INFO L82 PathProgramCache]: Analyzing trace with hash -712377196, now seen corresponding path program 1 times [2020-10-28 12:24:43,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:24:43,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284241669] [2020-10-28 12:24:43,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:24:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:43,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:43,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:44,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:46,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:46,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-28 12:24:46,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:24:46,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2761 [2020-10-28 12:24:46,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:46,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:46,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:24:46,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-28 12:24:46,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-28 12:24:46,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:24:46,448 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:24:46,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:24:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:46,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:46,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:46,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:24:46,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:24:46,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 12:24:46,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:46,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:46,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:24:46,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:24:46,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:24:46,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:24:46,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:24:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:46,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:46,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:46,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-28 12:24:46,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:24:46,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-28 12:24:46,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:46,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:46,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:24:46,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:24:46,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-28 12:24:46,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:24:46,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-28 12:24:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:24:46,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:46,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:24:46,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:24:46,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 12:24:46,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:24:46,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-28 12:24:46,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:24:46,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:24:46,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:24:46,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:24:46,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 12:24:46,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:24:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-10-28 12:24:47,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284241669] [2020-10-28 12:24:47,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:24:47,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:24:47,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879253722] [2020-10-28 12:24:47,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:24:47,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:24:47,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:24:47,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:24:47,121 INFO L87 Difference]: Start difference. First operand 23732 states and 29790 transitions. Second operand 5 states. [2020-10-28 12:24:48,446 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:25:06,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:25:06,914 INFO L93 Difference]: Finished difference Result 48314 states and 60986 transitions. [2020-10-28 12:25:06,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:25:06,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 302 [2020-10-28 12:25:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:25:07,015 INFO L225 Difference]: With dead ends: 48314 [2020-10-28 12:25:07,015 INFO L226 Difference]: Without dead ends: 25355 [2020-10-28 12:25:07,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 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 12:25:07,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25355 states. [2020-10-28 12:25:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25355 to 24554. [2020-10-28 12:25:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24554 states. [2020-10-28 12:25:07,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24554 states to 24554 states and 29797 transitions. [2020-10-28 12:25:07,759 INFO L78 Accepts]: Start accepts. Automaton has 24554 states and 29797 transitions. Word has length 302 [2020-10-28 12:25:07,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:25:07,760 INFO L481 AbstractCegarLoop]: Abstraction has 24554 states and 29797 transitions. [2020-10-28 12:25:07,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:25:07,761 INFO L276 IsEmpty]: Start isEmpty. Operand 24554 states and 29797 transitions. [2020-10-28 12:25:07,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-28 12:25:07,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:25:07,768 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:25:07,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 12:25:07,769 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:25:07,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:25:07,771 INFO L82 PathProgramCache]: Analyzing trace with hash -145631150, now seen corresponding path program 1 times [2020-10-28 12:25:07,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:25:07,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831490] [2020-10-28 12:25:07,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:25:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:25:07,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:08,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:08,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:10,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:25:10,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-28 12:25:10,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:25:10,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2481 [2020-10-28 12:25:10,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:25:10,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:25:10,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:25:10,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-28 12:25:10,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-28 12:25:10,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:25:10,545 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:25:10,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:25:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:25:10,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:10,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:25:10,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:25:10,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:25:10,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:25:10,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:25:10,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:25:10,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:25:10,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:25:10,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:25:10,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:25:10,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:25:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:25:10,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:10,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:25:10,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-28 12:25:10,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:25:10,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-28 12:25:10,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:25:10,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:25:10,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:25:10,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:25:10,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-28 12:25:10,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:25:10,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-28 12:25:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:25:10,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:10,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:11,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:25:11,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 12:25:11,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:25:11,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-28 12:25:11,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:25:11,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:25:11,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:25:11,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:25:11,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-28 12:25:11,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:25:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 141 proven. 56 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 12:25:11,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831490] [2020-10-28 12:25:11,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:25:11,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 12:25:11,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163662324] [2020-10-28 12:25:11,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 12:25:11,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:25:11,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 12:25:11,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:25:11,422 INFO L87 Difference]: Start difference. First operand 24554 states and 29797 transitions. Second operand 6 states. [2020-10-28 12:25:12,553 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:25:31,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:25:31,035 INFO L93 Difference]: Finished difference Result 66594 states and 82967 transitions. [2020-10-28 12:25:31,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 12:25:31,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 303 [2020-10-28 12:25:31,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:25:31,245 INFO L225 Difference]: With dead ends: 66594 [2020-10-28 12:25:31,245 INFO L226 Difference]: Without dead ends: 42813 [2020-10-28 12:25:31,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:25:31,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42813 states. [2020-10-28 12:25:32,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42813 to 40411. [2020-10-28 12:25:32,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40411 states. [2020-10-28 12:25:32,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40411 states to 40411 states and 48224 transitions. [2020-10-28 12:25:32,572 INFO L78 Accepts]: Start accepts. Automaton has 40411 states and 48224 transitions. Word has length 303 [2020-10-28 12:25:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:25:32,573 INFO L481 AbstractCegarLoop]: Abstraction has 40411 states and 48224 transitions. [2020-10-28 12:25:32,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 12:25:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 40411 states and 48224 transitions. [2020-10-28 12:25:32,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-28 12:25:32,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:25:32,578 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:25:32,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 12:25:32,579 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:25:32,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:25:32,580 INFO L82 PathProgramCache]: Analyzing trace with hash -872491344, now seen corresponding path program 1 times [2020-10-28 12:25:32,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:25:32,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953684710] [2020-10-28 12:25:32,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:25:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:25:32,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:33,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:25:33,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-28 12:25:33,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:25:33,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-28 12:25:33,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:25:33,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:25:33,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:25:33,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 260 [2020-10-28 12:25:33,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 12:25:33,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:25:33,522 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:25:33,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:25:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:25:33,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:33,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:25:33,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:25:33,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:25:33,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 12:25:33,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:25:33,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:25:33,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:25:33,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:25:33,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:25:33,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:25:33,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:25:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:25:33,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:33,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:25:33,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 12:25:33,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:25:33,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-28 12:25:33,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:25:33,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:25:33,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:25:33,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:25:33,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:25:33,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:25:33,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-28 12:25:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:25:33,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:25:33,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:25:33,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 12:25:33,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:25:33,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-28 12:25:33,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:25:33,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:25:33,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:25:33,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:25:33,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 12:25:33,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:25:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 12:25:34,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953684710] [2020-10-28 12:25:34,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:25:34,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 12:25:34,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052268420] [2020-10-28 12:25:34,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 12:25:34,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:25:34,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 12:25:34,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:25:34,274 INFO L87 Difference]: Start difference. First operand 40411 states and 48224 transitions. Second operand 6 states. [2020-10-28 12:25:36,345 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:25:38,007 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 67