/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 07:08:51,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 07:08:51,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 07:08:51,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 07:08:51,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 07:08:51,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 07:08:51,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 07:08:51,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 07:08:51,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 07:08:51,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 07:08:51,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 07:08:51,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 07:08:51,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 07:08:51,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 07:08:51,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 07:08:51,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 07:08:51,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 07:08:51,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 07:08:51,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 07:08:51,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 07:08:51,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 07:08:51,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 07:08:51,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 07:08:51,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 07:08:51,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 07:08:51,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 07:08:51,571 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 07:08:51,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 07:08:51,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 07:08:51,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 07:08:51,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 07:08:51,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 07:08:51,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 07:08:51,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 07:08:51,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 07:08:51,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 07:08:51,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 07:08:51,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 07:08:51,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 07:08:51,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 07:08:51,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 07:08:51,587 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 07:08:51,653 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 07:08:51,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 07:08:51,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 07:08:51,656 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 07:08:51,656 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 07:08:51,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 07:08:51,657 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 07:08:51,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 07:08:51,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 07:08:51,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 07:08:51,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 07:08:51,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 07:08:51,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 07:08:51,661 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 07:08:51,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 07:08:51,662 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 07:08:51,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 07:08:51,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 07:08:51,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 07:08:51,663 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 07:08:51,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 07:08:51,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 07:08:51,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 07:08:51,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 07:08:51,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 07:08:51,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 07:08:51,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 07:08:51,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 07:08:51,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 07:08:51,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 07:08:52,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 07:08:52,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 07:08:52,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 07:08:52,269 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 07:08:52,270 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 07:08:52,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label00.c [2020-10-29 07:08:52,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1fb6d2e5e/524bff0f9e4e438d9b65aa5b95245ba8/FLAG8d0bc0b7b [2020-10-29 07:08:53,662 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 07:08:53,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label00.c [2020-10-29 07:08:53,714 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1fb6d2e5e/524bff0f9e4e438d9b65aa5b95245ba8/FLAG8d0bc0b7b [2020-10-29 07:08:53,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1fb6d2e5e/524bff0f9e4e438d9b65aa5b95245ba8 [2020-10-29 07:08:54,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 07:08:54,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 07:08:54,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 07:08:54,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 07:08:54,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 07:08:54,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 07:08:54" (1/1) ... [2020-10-29 07:08:54,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74421ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:08:54, skipping insertion in model container [2020-10-29 07:08:54,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 07:08:54" (1/1) ... [2020-10-29 07:08:54,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 07:08:54,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 07:08:55,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 07:08:55,940 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 07:08:56,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 07:08:56,817 INFO L208 MainTranslator]: Completed translation [2020-10-29 07:08:56,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:08:56 WrapperNode [2020-10-29 07:08:56,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 07:08:56,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 07:08:56,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 07:08:56,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 07:08:56,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:08:56" (1/1) ... [2020-10-29 07:08:56,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:08:56" (1/1) ... [2020-10-29 07:08:56,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:08:56" (1/1) ... [2020-10-29 07:08:56,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:08:56" (1/1) ... [2020-10-29 07:08:57,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:08:56" (1/1) ... [2020-10-29 07:08:57,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:08:56" (1/1) ... [2020-10-29 07:08:57,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:08:56" (1/1) ... [2020-10-29 07:08:57,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 07:08:57,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 07:08:57,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 07:08:57,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 07:08:57,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:08:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 07:08:57,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 07:08:57,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 07:08:57,442 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 07:08:57,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 07:08:57,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 07:08:57,443 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 07:08:57,444 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 07:08:57,444 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 07:08:57,444 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 07:08:57,444 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 07:08:57,445 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 07:08:57,445 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 07:08:57,445 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 07:08:57,445 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 07:08:57,445 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 07:08:57,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 07:08:57,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 07:08:57,446 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 07:08:57,446 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 07:08:57,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 07:08:57,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 07:08:57,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 07:08:57,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 07:08:57,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 07:08:57,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 07:09:08,651 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 07:09:08,652 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 07:09:08,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 07:09:08 BoogieIcfgContainer [2020-10-29 07:09:08,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 07:09:08,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 07:09:08,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 07:09:08,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 07:09:08,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 07:08:54" (1/3) ... [2020-10-29 07:09:08,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a5dd256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 07:09:08, skipping insertion in model container [2020-10-29 07:09:08,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:08:56" (2/3) ... [2020-10-29 07:09:08,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a5dd256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 07:09:08, skipping insertion in model container [2020-10-29 07:09:08,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 07:09:08" (3/3) ... [2020-10-29 07:09:08,674 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label00.c [2020-10-29 07:09:08,690 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 07:09:08,698 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 07:09:08,717 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 07:09:08,778 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 07:09:08,779 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 07:09:08,779 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 07:09:08,779 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 07:09:08,779 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 07:09:08,779 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 07:09:08,780 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 07:09:08,780 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 07:09:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-29 07:09:08,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 07:09:08,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:09:08,855 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] [2020-10-29 07:09:08,855 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:09:08,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:09:08,867 INFO L82 PathProgramCache]: Analyzing trace with hash 67388114, now seen corresponding path program 1 times [2020-10-29 07:09:08,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:09:08,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622054853] [2020-10-29 07:09:08,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:09:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:09:09,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:09:09,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:09:09,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 07:09:09,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:09:09,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 602 [2020-10-29 07:09:09,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:09:09,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:09:09,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:09:09,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:09:09,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 07:09:09,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 07:09:10,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:09:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:09:10,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:09:10,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:09:10,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:09:10,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:09:10,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 07:09:10,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:09:10,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:09:10,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:09:10,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:09:10,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:09:10,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:09:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:09:10,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622054853] [2020-10-29 07:09:10,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:09:10,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 07:09:10,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232146710] [2020-10-29 07:09:10,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 07:09:10,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:09:10,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 07:09:10,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 07:09:10,142 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 5 states. [2020-10-29 07:09:35,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:09:35,065 INFO L93 Difference]: Finished difference Result 4085 states and 7568 transitions. [2020-10-29 07:09:35,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 07:09:35,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-10-29 07:09:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:09:35,119 INFO L225 Difference]: With dead ends: 4085 [2020-10-29 07:09:35,119 INFO L226 Difference]: Without dead ends: 2873 [2020-10-29 07:09:35,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:09:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2020-10-29 07:09:35,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 1935. [2020-10-29 07:09:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1935 states. [2020-10-29 07:09:35,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 3164 transitions. [2020-10-29 07:09:35,361 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 3164 transitions. Word has length 44 [2020-10-29 07:09:35,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:09:35,363 INFO L481 AbstractCegarLoop]: Abstraction has 1935 states and 3164 transitions. [2020-10-29 07:09:35,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 07:09:35,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 3164 transitions. [2020-10-29 07:09:35,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-29 07:09:35,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:09:35,374 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:09:35,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 07:09:35,376 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:09:35,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:09:35,378 INFO L82 PathProgramCache]: Analyzing trace with hash -191470870, now seen corresponding path program 1 times [2020-10-29 07:09:35,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:09:35,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704041238] [2020-10-29 07:09:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:09:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:09:35,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:09:36,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:09:36,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:09:37,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:09:37,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-29 07:09:37,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:09:37,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2012 [2020-10-29 07:09:37,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:09:37,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:09:37,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:09:37,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:09:37,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 07:09:37,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-29 07:09:37,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:09:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:09:37,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:09:37,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:09:37,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:09:37,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:09:37,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 07:09:37,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:09:37,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:09:37,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:09:37,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:09:37,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:09:37,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-29 07:09:37,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:09:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:09:37,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:09:38,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:09:38,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 07:09:38,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:09:38,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-29 07:09:38,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:09:38,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:09:38,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:09:38,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:09:38,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 07:09:38,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:09:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:09:38,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704041238] [2020-10-29 07:09:38,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:09:38,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:09:38,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158380636] [2020-10-29 07:09:38,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:09:38,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:09:38,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:09:38,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:09:38,164 INFO L87 Difference]: Start difference. First operand 1935 states and 3164 transitions. Second operand 7 states. [2020-10-29 07:10:10,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:10:10,653 INFO L93 Difference]: Finished difference Result 5668 states and 9394 transitions. [2020-10-29 07:10:10,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 07:10:10,654 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 119 [2020-10-29 07:10:10,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:10:10,678 INFO L225 Difference]: With dead ends: 5668 [2020-10-29 07:10:10,679 INFO L226 Difference]: Without dead ends: 3739 [2020-10-29 07:10:10,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:10:10,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2020-10-29 07:10:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3646. [2020-10-29 07:10:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3646 states. [2020-10-29 07:10:10,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 5459 transitions. [2020-10-29 07:10:10,802 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 5459 transitions. Word has length 119 [2020-10-29 07:10:10,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:10:10,803 INFO L481 AbstractCegarLoop]: Abstraction has 3646 states and 5459 transitions. [2020-10-29 07:10:10,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:10:10,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 5459 transitions. [2020-10-29 07:10:10,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-29 07:10:10,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:10:10,806 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:10:10,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 07:10:10,807 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:10:10,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:10:10,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1280942, now seen corresponding path program 1 times [2020-10-29 07:10:10,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:10:10,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796833448] [2020-10-29 07:10:10,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:10:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:10:10,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:10:11,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:10:11,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:10:11,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-29 07:10:11,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:10:11,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 938 [2020-10-29 07:10:11,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:10:11,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:10:11,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:10:11,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:10:11,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-29 07:10:11,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 07:10:11,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:10:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:10:11,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:10:11,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:10:11,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:10:11,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:10:11,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 07:10:11,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:10:11,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:10:11,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:10:11,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:10:11,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:10:11,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:10:11,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:10:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:10:12,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:10:12,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:10:12,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 07:10:12,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:10:12,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-29 07:10:12,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:10:12,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:10:12,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:10:12,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:10:12,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-29 07:10:12,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:10:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:10:12,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796833448] [2020-10-29 07:10:12,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:10:12,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:10:12,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732658639] [2020-10-29 07:10:12,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:10:12,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:10:12,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:10:12,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:10:12,342 INFO L87 Difference]: Start difference. First operand 3646 states and 5459 transitions. Second operand 7 states. [2020-10-29 07:10:34,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:10:34,716 INFO L93 Difference]: Finished difference Result 10837 states and 16686 transitions. [2020-10-29 07:10:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 07:10:34,718 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 133 [2020-10-29 07:10:34,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:10:34,762 INFO L225 Difference]: With dead ends: 10837 [2020-10-29 07:10:34,762 INFO L226 Difference]: Without dead ends: 7197 [2020-10-29 07:10:34,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:10:34,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7197 states. [2020-10-29 07:10:35,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7197 to 7099. [2020-10-29 07:10:35,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7099 states. [2020-10-29 07:10:35,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 9714 transitions. [2020-10-29 07:10:35,027 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 9714 transitions. Word has length 133 [2020-10-29 07:10:35,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:10:35,028 INFO L481 AbstractCegarLoop]: Abstraction has 7099 states and 9714 transitions. [2020-10-29 07:10:35,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:10:35,029 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 9714 transitions. [2020-10-29 07:10:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-29 07:10:35,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:10:35,036 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:10:35,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 07:10:35,040 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:10:35,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:10:35,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1889936526, now seen corresponding path program 1 times [2020-10-29 07:10:35,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:10:35,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449700011] [2020-10-29 07:10:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:10:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:10:35,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:10:35,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:10:36,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:10:36,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-29 07:10:36,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:10:36,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 945 [2020-10-29 07:10:36,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:10:36,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:10:36,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:10:36,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:10:36,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-29 07:10:36,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:10:36,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:10:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:10:36,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:10:36,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:10:36,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:10:36,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:10:36,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 07:10:36,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:10:36,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:10:36,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:10:36,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:10:36,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:10:36,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:10:36,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:10:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:10:36,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:10:36,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:10:36,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 07:10:36,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:10:36,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-29 07:10:36,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:10:36,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:10:36,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:10:36,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:10:36,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-29 07:10:36,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:10:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:10:36,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449700011] [2020-10-29 07:10:36,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:10:36,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:10:36,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075727000] [2020-10-29 07:10:36,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:10:36,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:10:36,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:10:36,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:10:36,534 INFO L87 Difference]: Start difference. First operand 7099 states and 9714 transitions. Second operand 7 states. [2020-10-29 07:11:02,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:11:02,978 INFO L93 Difference]: Finished difference Result 21573 states and 30684 transitions. [2020-10-29 07:11:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 07:11:02,980 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 149 [2020-10-29 07:11:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:11:03,054 INFO L225 Difference]: With dead ends: 21573 [2020-10-29 07:11:03,055 INFO L226 Difference]: Without dead ends: 14480 [2020-10-29 07:11:03,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:11:03,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2020-10-29 07:11:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 14216. [2020-10-29 07:11:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-10-29 07:11:03,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 18318 transitions. [2020-10-29 07:11:03,496 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 18318 transitions. Word has length 149 [2020-10-29 07:11:03,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:11:03,497 INFO L481 AbstractCegarLoop]: Abstraction has 14216 states and 18318 transitions. [2020-10-29 07:11:03,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:11:03,497 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 18318 transitions. [2020-10-29 07:11:03,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-29 07:11:03,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:11:03,500 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:11:03,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 07:11:03,501 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:11:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:11:03,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1464279561, now seen corresponding path program 1 times [2020-10-29 07:11:03,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:11:03,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793933280] [2020-10-29 07:11:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:11:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:11:03,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:11:03,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:11:03,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-29 07:11:03,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:11:03,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-29 07:11:03,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:11:03,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:11:03,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:11:03,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-29 07:11:03,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 07:11:03,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:11:04,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:11:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:11:04,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:11:04,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:11:04,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:11:04,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:11:04,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 07:11:04,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:11:04,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:11:04,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:11:04,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:11:04,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:11:04,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:11:04,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:11:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:11:04,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:11:04,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:11:04,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-29 07:11:04,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:11:04,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-29 07:11:04,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:11:04,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:11:04,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:11:04,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:11:04,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-29 07:11:04,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:11:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:11:04,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793933280] [2020-10-29 07:11:04,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:11:04,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 07:11:04,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137576690] [2020-10-29 07:11:04,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 07:11:04,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:11:04,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 07:11:04,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 07:11:04,499 INFO L87 Difference]: Start difference. First operand 14216 states and 18318 transitions. Second operand 5 states. [2020-10-29 07:11:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:11:29,360 INFO L93 Difference]: Finished difference Result 36641 states and 49235 transitions. [2020-10-29 07:11:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 07:11:29,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 173 [2020-10-29 07:11:29,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:11:29,447 INFO L225 Difference]: With dead ends: 36641 [2020-10-29 07:11:29,447 INFO L226 Difference]: Without dead ends: 22431 [2020-10-29 07:11:29,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 07:11:29,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22431 states. [2020-10-29 07:11:30,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22431 to 22361. [2020-10-29 07:11:30,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22361 states. [2020-10-29 07:11:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22361 states to 22361 states and 28764 transitions. [2020-10-29 07:11:30,157 INFO L78 Accepts]: Start accepts. Automaton has 22361 states and 28764 transitions. Word has length 173 [2020-10-29 07:11:30,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:11:30,157 INFO L481 AbstractCegarLoop]: Abstraction has 22361 states and 28764 transitions. [2020-10-29 07:11:30,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 07:11:30,158 INFO L276 IsEmpty]: Start isEmpty. Operand 22361 states and 28764 transitions. [2020-10-29 07:11:30,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-29 07:11:30,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:11:30,163 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-29 07:11:30,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 07:11:30,164 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:11:30,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:11:30,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1436978170, now seen corresponding path program 1 times [2020-10-29 07:11:30,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:11:30,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347858120] [2020-10-29 07:11:30,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:11:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:11:30,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:11:30,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:11:31,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:11:34,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:11:34,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-29 07:11:34,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:11:34,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4463 [2020-10-29 07:11:34,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:11:34,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:11:34,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:11:34,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-29 07:11:34,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-29 07:11:34,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:11:34,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:11:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:11:34,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:11:34,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:11:34,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:11:34,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:11:34,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 07:11:34,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:11:34,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:11:34,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:11:34,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:11:34,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:11:34,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:11:34,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:11:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:11:34,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:11:35,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:11:35,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 07:11:35,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:11:35,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-29 07:11:35,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:11:35,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:11:35,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:11:35,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:11:35,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 07:11:35,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:11:35,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-29 07:11:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:11:35,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:11:35,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:11:35,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 07:11:35,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:11:35,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-29 07:11:35,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:11:35,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:11:35,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:11:35,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:11:35,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-29 07:11:35,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:11:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 162 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 07:11:35,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347858120] [2020-10-29 07:11:35,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:11:35,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 07:11:35,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118654578] [2020-10-29 07:11:35,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:11:35,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:11:35,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:11:35,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:11:35,411 INFO L87 Difference]: Start difference. First operand 22361 states and 28764 transitions. Second operand 7 states. [2020-10-29 07:12:10,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:12:10,757 INFO L93 Difference]: Finished difference Result 52626 states and 70570 transitions. [2020-10-29 07:12:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 07:12:10,759 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 242 [2020-10-29 07:12:10,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:12:10,871 INFO L225 Difference]: With dead ends: 52626 [2020-10-29 07:12:10,871 INFO L226 Difference]: Without dead ends: 30271 [2020-10-29 07:12:10,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:12:10,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30271 states. [2020-10-29 07:12:11,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30271 to 29357. [2020-10-29 07:12:11,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29357 states. [2020-10-29 07:12:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29357 states to 29357 states and 37698 transitions. [2020-10-29 07:12:11,786 INFO L78 Accepts]: Start accepts. Automaton has 29357 states and 37698 transitions. Word has length 242 [2020-10-29 07:12:11,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:12:11,787 INFO L481 AbstractCegarLoop]: Abstraction has 29357 states and 37698 transitions. [2020-10-29 07:12:11,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:12:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 29357 states and 37698 transitions. [2020-10-29 07:12:11,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-29 07:12:11,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:12:11,793 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-29 07:12:11,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 07:12:11,794 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:12:11,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:12:11,794 INFO L82 PathProgramCache]: Analyzing trace with hash 112703510, now seen corresponding path program 1 times [2020-10-29 07:12:11,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:12:11,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291899768] [2020-10-29 07:12:11,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:12:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:12:11,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:12:12,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:12:12,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:12:16,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:12:16,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-10-29 07:12:16,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:12:16,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-29 07:12:16,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:12:16,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:12:16,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:12:16,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-29 07:12:16,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-29 07:12:16,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:12:17,095 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 07:12:17,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:12:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:12:17,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:12:17,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:12:17,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:12:17,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:12:17,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 07:12:17,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:12:17,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:12:17,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:12:17,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:12:17,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:12:17,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:12:17,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:12:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:12:17,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:12:17,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:12:17,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 07:12:17,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:12:17,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-29 07:12:17,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:12:17,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:12:17,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:12:17,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:12:17,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 07:12:17,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:12:17,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-29 07:12:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:12:17,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:12:17,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:12:17,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-29 07:12:17,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:12:17,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-29 07:12:17,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:12:17,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:12:17,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:12:17,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:12:17,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-29 07:12:17,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:12:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 162 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 07:12:17,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291899768] [2020-10-29 07:12:17,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:12:17,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 07:12:17,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524331110] [2020-10-29 07:12:17,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:12:17,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:12:17,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:12:17,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:12:17,828 INFO L87 Difference]: Start difference. First operand 29357 states and 37698 transitions. Second operand 7 states. [2020-10-29 07:12:17,999 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 07:12:25,095 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66