/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=DEEPEST --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/Problem19_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:25:11,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:25:11,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:25:12,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:25:12,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:25:12,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:25:12,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:25:12,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:25:12,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:25:12,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:25:12,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:25:12,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:25:12,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:25:12,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:25:12,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:25:12,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:25:12,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:25:12,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:25:12,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:25:12,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:25:12,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:25:12,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:25:12,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:25:12,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:25:12,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:25:12,121 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:25:12,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:25:12,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:25:12,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:25:12,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:25:12,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:25:12,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:25:12,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:25:12,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:25:12,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:25:12,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:25:12,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:25:12,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:25:12,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:25:12,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:25:12,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:25:12,158 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 [2020-10-27 19:25:12,221 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:25:12,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:25:12,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:25:12,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:25:12,228 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:25:12,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:25:12,229 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:25:12,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:25:12,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:25:12,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:25:12,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:25:12,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:25:12,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:25:12,232 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:25:12,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:25:12,233 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:25:12,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:25:12,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:25:12,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:25:12,233 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:25:12,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:25:12,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:25:12,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:25:12,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:25:12,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:25:12,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:25:12,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:25:12,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:25:12,235 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:25:12,236 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:25:12,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:25:12,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:25:12,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:25:12,778 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:25:12,779 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:25:12,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label25.c [2020-10-27 19:25:12,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e06eb9f6/18f2fa3f3d254353b8ffc51d1e7b4b51/FLAGcb2185cf6 [2020-10-27 19:25:14,370 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:25:14,373 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label25.c [2020-10-27 19:25:14,444 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e06eb9f6/18f2fa3f3d254353b8ffc51d1e7b4b51/FLAGcb2185cf6 [2020-10-27 19:25:14,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e06eb9f6/18f2fa3f3d254353b8ffc51d1e7b4b51 [2020-10-27 19:25:14,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:25:14,522 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:25:14,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:25:14,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:25:14,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:25:14,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:25:14" (1/1) ... [2020-10-27 19:25:14,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@321439be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:25:14, skipping insertion in model container [2020-10-27 19:25:14,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:25:14" (1/1) ... [2020-10-27 19:25:14,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:25:14,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:25:17,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:25:17,215 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:25:18,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:25:18,612 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:25:18,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:25:18 WrapperNode [2020-10-27 19:25:18,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:25:18,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:25:18,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:25:18,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:25:18,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:25:18" (1/1) ... [2020-10-27 19:25:18,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:25:18" (1/1) ... [2020-10-27 19:25:18,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:25:18" (1/1) ... [2020-10-27 19:25:18,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:25:18" (1/1) ... [2020-10-27 19:25:19,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:25:18" (1/1) ... [2020-10-27 19:25:19,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:25:18" (1/1) ... [2020-10-27 19:25:19,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:25:18" (1/1) ... [2020-10-27 19:25:19,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:25:19,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:25:19,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:25:19,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:25:19,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:25:18" (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 [2020-10-27 19:25:19,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:25:19,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:25:19,669 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:25:19,669 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 19:25:19,670 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 19:25:19,670 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 19:25:19,670 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 19:25:19,670 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 19:25:19,671 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 19:25:19,671 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:25:19,672 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 19:25:19,672 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 19:25:19,673 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 19:25:19,673 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 19:25:19,673 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 19:25:19,674 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 19:25:19,675 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:25:19,675 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:25:19,675 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:25:19,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:25:19,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:25:19,676 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:25:19,676 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:25:19,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:25:19,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:25:19,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:25:19,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:25:19,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:25:19,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:25:36,393 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:25:36,394 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:25:36,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:25:36 BoogieIcfgContainer [2020-10-27 19:25:36,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:25:36,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:25:36,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:25:36,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:25:36,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:25:14" (1/3) ... [2020-10-27 19:25:36,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c8749ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:25:36, skipping insertion in model container [2020-10-27 19:25:36,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:25:18" (2/3) ... [2020-10-27 19:25:36,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c8749ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:25:36, skipping insertion in model container [2020-10-27 19:25:36,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:25:36" (3/3) ... [2020-10-27 19:25:36,420 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label25.c [2020-10-27 19:25:36,438 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:25:36,447 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:25:36,462 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:25:36,512 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:25:36,512 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:25:36,513 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:25:36,513 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:25:36,513 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:25:36,513 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:25:36,513 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:25:36,513 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:25:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 19:25:36,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:25:36,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:25:36,593 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] [2020-10-27 19:25:36,594 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:25:36,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:25:36,615 INFO L82 PathProgramCache]: Analyzing trace with hash -811372538, now seen corresponding path program 1 times [2020-10-27 19:25:36,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:25:36,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338982397] [2020-10-27 19:25:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:25:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:25:37,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:37,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:25:37,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:25:37,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:25:37,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 877 [2020-10-27 19:25:37,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:25:37,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:25:37,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:25:37,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 19:25:37,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 19:25:38,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:25:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:25:38,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:38,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:25:38,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:25:38,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:25:38,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 19:25:38,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:25:38,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:25:38,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:25:38,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:25:38,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:25:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:25:38,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338982397] [2020-10-27 19:25:38,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:25:38,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:25:38,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372325212] [2020-10-27 19:25:38,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:25:38,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:25:38,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:25:38,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:25:38,288 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 19:26:15,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:26:15,339 INFO L93 Difference]: Finished difference Result 5081 states and 9549 transitions. [2020-10-27 19:26:15,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:26:15,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-27 19:26:15,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:26:15,417 INFO L225 Difference]: With dead ends: 5081 [2020-10-27 19:26:15,417 INFO L226 Difference]: Without dead ends: 3220 [2020-10-27 19:26:15,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:26:15,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2020-10-27 19:26:15,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 3195. [2020-10-27 19:26:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3195 states. [2020-10-27 19:26:15,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 5074 transitions. [2020-10-27 19:26:15,783 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 5074 transitions. Word has length 43 [2020-10-27 19:26:15,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:26:15,786 INFO L481 AbstractCegarLoop]: Abstraction has 3195 states and 5074 transitions. [2020-10-27 19:26:15,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:26:15,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 5074 transitions. [2020-10-27 19:26:15,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 19:26:15,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:26:15,800 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:26:15,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:26:15,803 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:26:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:26:15,805 INFO L82 PathProgramCache]: Analyzing trace with hash -75454792, now seen corresponding path program 1 times [2020-10-27 19:26:15,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:26:15,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830534035] [2020-10-27 19:26:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:26:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:26:15,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:16,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:16,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:17,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:18,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:26:18,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 19:26:18,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:26:18,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2247 [2020-10-27 19:26:18,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:26:18,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:26:18,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 19:26:18,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:26:18,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:26:18,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:26:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:26:18,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:18,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:26:18,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:26:18,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:26:18,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:26:18,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:26:18,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:26:18,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:26:18,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:26:18,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:26:18,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:26:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:26:18,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:18,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:18,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:26:18,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 19:26:18,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:26:18,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-27 19:26:18,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:26:18,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:26:18,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-27 19:26:18,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:26:18,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:26:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:26:18,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830534035] [2020-10-27 19:26:18,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:26:18,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:26:18,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686428851] [2020-10-27 19:26:18,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:26:18,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:26:18,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:26:18,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:26:18,796 INFO L87 Difference]: Start difference. First operand 3195 states and 5074 transitions. Second operand 6 states. [2020-10-27 19:26:18,988 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:27:11,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:27:11,373 INFO L93 Difference]: Finished difference Result 12219 states and 19714 transitions. [2020-10-27 19:27:11,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:27:11,381 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-10-27 19:27:11,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:27:11,433 INFO L225 Difference]: With dead ends: 12219 [2020-10-27 19:27:11,434 INFO L226 Difference]: Without dead ends: 9030 [2020-10-27 19:27:11,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:27:11,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9030 states. [2020-10-27 19:27:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9030 to 8933. [2020-10-27 19:27:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8933 states. [2020-10-27 19:27:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8933 states to 8933 states and 12778 transitions. [2020-10-27 19:27:11,776 INFO L78 Accepts]: Start accepts. Automaton has 8933 states and 12778 transitions. Word has length 114 [2020-10-27 19:27:11,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:27:11,779 INFO L481 AbstractCegarLoop]: Abstraction has 8933 states and 12778 transitions. [2020-10-27 19:27:11,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:27:11,779 INFO L276 IsEmpty]: Start isEmpty. Operand 8933 states and 12778 transitions. [2020-10-27 19:27:11,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 19:27:11,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:27:11,792 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:27:11,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:27:11,793 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:27:11,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:27:11,794 INFO L82 PathProgramCache]: Analyzing trace with hash 172691702, now seen corresponding path program 1 times [2020-10-27 19:27:11,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:27:11,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614719622] [2020-10-27 19:27:11,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:27:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:27:11,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:27:12,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:27:12,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:27:12,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:27:12,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 19:27:12,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:27:12,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 975 [2020-10-27 19:27:12,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:27:12,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:27:12,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 19:27:12,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 19:27:12,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:27:12,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:27:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:27:12,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:27:12,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:27:12,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:27:12,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:27:12,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:27:12,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:27:12,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:27:12,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:27:12,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:27:12,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:27:13,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:27:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:27:13,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:27:13,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:27:13,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 19:27:13,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:27:13,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-27 19:27:13,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:27:13,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:27:13,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:27:13,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 19:27:13,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:27:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:27:13,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614719622] [2020-10-27 19:27:13,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:27:13,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:27:13,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579665288] [2020-10-27 19:27:13,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:27:13,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:27:13,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:27:13,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:27:13,193 INFO L87 Difference]: Start difference. First operand 8933 states and 12778 transitions. Second operand 6 states. [2020-10-27 19:27:13,895 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:28:22,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:28:22,015 INFO L93 Difference]: Finished difference Result 34743 states and 51014 transitions. [2020-10-27 19:28:22,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:28:22,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-10-27 19:28:22,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:28:22,136 INFO L225 Difference]: With dead ends: 34743 [2020-10-27 19:28:22,136 INFO L226 Difference]: Without dead ends: 25816 [2020-10-27 19:28:22,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:28:22,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25816 states. [2020-10-27 19:28:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25816 to 25807. [2020-10-27 19:28:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25807 states. [2020-10-27 19:28:22,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25807 states to 25807 states and 35056 transitions. [2020-10-27 19:28:22,881 INFO L78 Accepts]: Start accepts. Automaton has 25807 states and 35056 transitions. Word has length 114 [2020-10-27 19:28:22,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:28:22,884 INFO L481 AbstractCegarLoop]: Abstraction has 25807 states and 35056 transitions. [2020-10-27 19:28:22,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:28:22,884 INFO L276 IsEmpty]: Start isEmpty. Operand 25807 states and 35056 transitions. [2020-10-27 19:28:22,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 19:28:22,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:28:22,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:28:22,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:28:22,895 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:28:22,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:28:22,897 INFO L82 PathProgramCache]: Analyzing trace with hash -518578982, now seen corresponding path program 1 times [2020-10-27 19:28:22,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:28:22,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361934946] [2020-10-27 19:28:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:28:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:28:22,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:28:23,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:28:23,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:28:23,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 19:28:23,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:28:23,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 978 [2020-10-27 19:28:23,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:28:23,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:28:23,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 19:28:23,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 19:28:23,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:28:24,089 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:28:24,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:28:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:28:24,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:28:24,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:28:24,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:28:24,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:28:24,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:28:24,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:28:24,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:28:24,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:28:24,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:28:24,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:28:24,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:28:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:28:24,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:28:24,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:28:24,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 19:28:24,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:28:24,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-27 19:28:24,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:28:24,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:28:24,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:28:24,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 19:28:24,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:28:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:28:24,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361934946] [2020-10-27 19:28:24,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:28:24,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:28:24,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9204774] [2020-10-27 19:28:24,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:28:24,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:28:24,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:28:24,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:28:24,291 INFO L87 Difference]: Start difference. First operand 25807 states and 35056 transitions. Second operand 5 states. [2020-10-27 19:28:25,152 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66