/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=SHALLOWEST --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/Problem06_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:36:20,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:36:20,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:36:20,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:36:20,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:36:20,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:36:20,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:36:20,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:36:20,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:36:20,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:36:20,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:36:20,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:36:20,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:36:20,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:36:20,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:36:20,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:36:20,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:36:20,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:36:20,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:36:20,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:36:20,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:36:20,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:36:20,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:36:20,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:36:20,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:36:20,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:36:20,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:36:20,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:36:20,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:36:20,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:36:20,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:36:20,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:36:20,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:36:20,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:36:20,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:36:20,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:36:20,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:36:20,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:36:20,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:36:20,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:36:20,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:36:20,618 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 [2020-10-26 21:36:20,652 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:36:20,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:36:20,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:36:20,656 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:36:20,656 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:36:20,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:36:20,656 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:36:20,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:36:20,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:36:20,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:36:20,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:36:20,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:36:20,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:36:20,658 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:36:20,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:36:20,659 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:36:20,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:36:20,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:36:20,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:36:20,660 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:36:20,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:36:20,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:36:20,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:36:20,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:36:20,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:36:20,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:36:20,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:36:20,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:36:20,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:36:20,662 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:36:21,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:36:21,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:36:21,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:36:21,114 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:36:21,115 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:36:21,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label41.c [2020-10-26 21:36:21,185 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df317aec0/456570f04a38482daea06fa5d592a27c/FLAG11c566ec0 [2020-10-26 21:36:22,454 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:36:22,455 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label41.c [2020-10-26 21:36:22,522 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df317aec0/456570f04a38482daea06fa5d592a27c/FLAG11c566ec0 [2020-10-26 21:36:22,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df317aec0/456570f04a38482daea06fa5d592a27c [2020-10-26 21:36:22,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:36:22,619 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:36:22,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:36:22,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:36:22,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:36:22,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:36:22" (1/1) ... [2020-10-26 21:36:22,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@786f2e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:22, skipping insertion in model container [2020-10-26 21:36:22,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:36:22" (1/1) ... [2020-10-26 21:36:22,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:36:22,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:36:25,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:36:25,035 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:36:26,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:36:26,252 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:36:26,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:26 WrapperNode [2020-10-26 21:36:26,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:36:26,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:36:26,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:36:26,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:36:26,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:26" (1/1) ... [2020-10-26 21:36:26,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:26" (1/1) ... [2020-10-26 21:36:26,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:26" (1/1) ... [2020-10-26 21:36:26,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:26" (1/1) ... [2020-10-26 21:36:26,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:26" (1/1) ... [2020-10-26 21:36:26,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:26" (1/1) ... [2020-10-26 21:36:26,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:26" (1/1) ... [2020-10-26 21:36:26,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:36:26,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:36:26,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:36:26,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:36:26,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:26" (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 [2020-10-26 21:36:26,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:36:26,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:36:26,851 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:36:26,851 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:36:26,851 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:36:26,851 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:36:26,852 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:36:26,852 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:36:26,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:36:26,852 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:36:26,852 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:36:26,853 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:36:26,853 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:36:26,853 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:36:26,853 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:36:26,853 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:36:26,853 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:36:26,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:36:26,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:36:26,854 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:36:26,854 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:36:26,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:36:26,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:36:26,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:36:26,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:36:26,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:36:26,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:36:34,682 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:36:34,682 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:36:34,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:36:34 BoogieIcfgContainer [2020-10-26 21:36:34,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:36:34,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:36:34,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:36:34,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:36:34,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:36:22" (1/3) ... [2020-10-26 21:36:34,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ddd6ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:36:34, skipping insertion in model container [2020-10-26 21:36:34,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:26" (2/3) ... [2020-10-26 21:36:34,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ddd6ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:36:34, skipping insertion in model container [2020-10-26 21:36:34,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:36:34" (3/3) ... [2020-10-26 21:36:34,701 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label41.c [2020-10-26 21:36:34,713 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:36:34,720 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:36:34,734 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:36:34,786 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:36:34,786 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:36:34,787 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:36:34,787 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:36:34,787 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:36:34,787 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:36:34,787 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:36:34,788 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:36:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-26 21:36:34,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1002 [2020-10-26 21:36:34,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:36:34,922 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:36:34,923 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:36:34,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:36:34,930 INFO L82 PathProgramCache]: Analyzing trace with hash 135698188, now seen corresponding path program 1 times [2020-10-26 21:36:34,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:36:34,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019431189] [2020-10-26 21:36:34,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:36:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:36:36,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:36:40,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:36:41,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:36:41,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1019 [2020-10-26 21:36:41,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:36:41,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5112 [2020-10-26 21:36:41,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:36:41,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 21:36:41,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:36:41,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 769 [2020-10-26 21:36:41,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 21:36:44,819 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:36:45,036 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:36:45,299 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:36:45,511 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-26 21:36:45,702 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 21:36:45,920 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 21:36:46,143 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 21:36:46,309 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 21:36:46,476 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 21:36:46,652 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 21:36:47,237 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:36:47,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:36:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:36:47,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:36:47,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:36:47,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:36:47,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:36:47,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 21:36:47,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:36:47,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:36:47,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:36:47,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:36:47,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:37:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:37:00,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019431189] [2020-10-26 21:37:00,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:37:00,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-26 21:37:00,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420747645] [2020-10-26 21:37:00,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:37:00,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:37:00,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:37:00,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:37:00,232 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 18 states. [2020-10-26 21:37:00,647 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-26 21:37:01,384 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-26 21:37:02,130 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-26 21:37:02,954 WARN L193 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 204 [2020-10-26 21:37:06,769 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 203 [2020-10-26 21:37:10,138 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 215 DAG size of output: 202 [2020-10-26 21:37:12,538 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 193 [2020-10-26 21:37:13,301 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 199 [2020-10-26 21:37:14,322 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 198 [2020-10-26 21:37:23,430 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 191 [2020-10-26 21:37:24,146 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 196 [2020-10-26 21:37:26,932 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 195 [2020-10-26 21:37:34,375 WARN L193 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 189 [2020-10-26 21:37:35,195 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 193 [2020-10-26 21:37:37,801 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 191 [2020-10-26 21:37:49,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:37:49,724 INFO L93 Difference]: Finished difference Result 3401 states and 6365 transitions. [2020-10-26 21:37:49,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 21:37:49,727 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1001 [2020-10-26 21:37:49,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:37:49,781 INFO L225 Difference]: With dead ends: 3401 [2020-10-26 21:37:49,781 INFO L226 Difference]: Without dead ends: 2020 [2020-10-26 21:37:49,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 21:37:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-26 21:37:49,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2020. [2020-10-26 21:37:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-26 21:37:49,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3054 transitions. [2020-10-26 21:37:49,970 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3054 transitions. Word has length 1001 [2020-10-26 21:37:49,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:37:49,975 INFO L481 AbstractCegarLoop]: Abstraction has 2020 states and 3054 transitions. [2020-10-26 21:37:49,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:37:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3054 transitions. [2020-10-26 21:37:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1072 [2020-10-26 21:37:50,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:37:50,024 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:37:50,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:37:50,025 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:37:50,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:37:50,033 INFO L82 PathProgramCache]: Analyzing trace with hash -32007837, now seen corresponding path program 1 times [2020-10-26 21:37:50,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:37:50,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130271425] [2020-10-26 21:37:50,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:37:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:37:50,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:37:52,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:37:55,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:37:55,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1091 [2020-10-26 21:37:55,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:37:55,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-26 21:37:55,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:37:55,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:37:55,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:37:55,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 21:37:55,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:37:55,767 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:37:55,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:37:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:37:55,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:37:55,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:37:55,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:37:55,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:37:55,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 21:37:55,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:37:55,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:37:55,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:37:55,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:37:55,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:37:55,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:37:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:37:55,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:37:56,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:37:56,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 21:37:56,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:37:56,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-26 21:37:56,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:37:56,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:37:56,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:37:56,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 21:37:56,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:37:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:37:57,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130271425] [2020-10-26 21:37:57,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:37:57,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:37:57,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876842695] [2020-10-26 21:37:57,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:37:57,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:37:57,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:37:57,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:37:57,620 INFO L87 Difference]: Start difference. First operand 2020 states and 3054 transitions. Second operand 7 states. [2020-10-26 21:37:57,846 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 21:37:59,060 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-26 21:38:20,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:38:20,444 INFO L93 Difference]: Finished difference Result 4473 states and 7507 transitions. [2020-10-26 21:38:20,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:38:20,445 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1071 [2020-10-26 21:38:20,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:38:20,470 INFO L225 Difference]: With dead ends: 4473 [2020-10-26 21:38:20,470 INFO L226 Difference]: Without dead ends: 3213 [2020-10-26 21:38:20,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:38:20,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2020-10-26 21:38:20,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 3141. [2020-10-26 21:38:20,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3141 states. [2020-10-26 21:38:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 4647 transitions. [2020-10-26 21:38:20,578 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 4647 transitions. Word has length 1071 [2020-10-26 21:38:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:38:20,579 INFO L481 AbstractCegarLoop]: Abstraction has 3141 states and 4647 transitions. [2020-10-26 21:38:20,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:38:20,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 4647 transitions. [2020-10-26 21:38:20,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1124 [2020-10-26 21:38:20,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:38:20,609 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:38:20,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:38:20,609 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:38:20,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:38:20,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1333647168, now seen corresponding path program 1 times [2020-10-26 21:38:20,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:38:20,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154241489] [2020-10-26 21:38:20,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:38:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:21,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:22,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:26,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:26,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1143 [2020-10-26 21:38:26,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:38:26,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5212 [2020-10-26 21:38:26,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:26,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 21:38:26,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:38:26,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 552 [2020-10-26 21:38:26,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:28,675 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-26 21:38:28,839 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-26 21:38:29,045 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-10-26 21:38:29,198 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-26 21:38:29,344 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-26 21:38:29,497 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-26 21:38:29,684 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2020-10-26 21:38:29,895 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-10-26 21:38:30,069 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-10-26 21:38:30,218 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-10-26 21:38:30,555 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:38:30,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:38:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:30,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:30,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:30,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:38:30,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:38:30,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 21:38:30,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:30,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:38:30,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:38:30,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:38:30,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:30,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:38:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:30,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:31,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:31,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:38:31,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:38:31,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-26 21:38:31,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:31,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 21:38:31,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:38:31,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:38:31,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:38:42,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154241489] [2020-10-26 21:38:42,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:38:42,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 21:38:42,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992978830] [2020-10-26 21:38:42,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:38:42,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:38:42,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:38:42,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:38:42,078 INFO L87 Difference]: Start difference. First operand 3141 states and 4647 transitions. Second operand 18 states. [2020-10-26 21:38:42,388 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-26 21:38:44,518 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 79 [2020-10-26 21:38:44,793 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2020-10-26 21:38:45,133 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2020-10-26 21:38:45,885 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 197 [2020-10-26 21:38:46,730 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 205 [2020-10-26 21:38:48,122 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 204 [2020-10-26 21:38:51,589 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 228 DAG size of output: 204 [2020-10-26 21:39:00,721 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 203 [2020-10-26 21:39:01,713 WARN L193 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 217 [2020-10-26 21:39:03,309 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 214 [2020-10-26 21:39:13,467 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 228 DAG size of output: 211 [2020-10-26 21:39:15,102 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 228 DAG size of output: 207 [2020-10-26 21:39:39,773 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-26 21:39:55,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:39:55,789 INFO L93 Difference]: Finished difference Result 9369 states and 15283 transitions. [2020-10-26 21:39:55,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 21:39:55,791 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1123 [2020-10-26 21:39:55,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:39:55,830 INFO L225 Difference]: With dead ends: 9369 [2020-10-26 21:39:55,830 INFO L226 Difference]: Without dead ends: 6988 [2020-10-26 21:39:55,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 21:39:55,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6988 states. [2020-10-26 21:39:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6988 to 6931. [2020-10-26 21:39:56,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6931 states. [2020-10-26 21:39:56,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6931 states to 6931 states and 9890 transitions. [2020-10-26 21:39:56,056 INFO L78 Accepts]: Start accepts. Automaton has 6931 states and 9890 transitions. Word has length 1123 [2020-10-26 21:39:56,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:39:56,057 INFO L481 AbstractCegarLoop]: Abstraction has 6931 states and 9890 transitions. [2020-10-26 21:39:56,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:39:56,057 INFO L276 IsEmpty]: Start isEmpty. Operand 6931 states and 9890 transitions. [2020-10-26 21:39:56,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1149 [2020-10-26 21:39:56,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:39:56,094 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:39:56,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:39:56,094 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:39:56,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:39:56,095 INFO L82 PathProgramCache]: Analyzing trace with hash 530280670, now seen corresponding path program 1 times [2020-10-26 21:39:56,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:39:56,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593315915] [2020-10-26 21:39:56,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:39:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:39:56,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:58,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:01,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:40:01,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1170 [2020-10-26 21:40:01,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:40:01,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5208 [2020-10-26 21:40:01,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:40:01,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 21:40:01,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:40:01,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 891 [2020-10-26 21:40:01,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:40:04,455 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-26 21:40:04,652 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79