/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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:05:49,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:05:49,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:05:49,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:05:49,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:05:49,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:05:49,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:05:49,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:05:49,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:05:49,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:05:49,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:05:49,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:05:49,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:05:49,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:05:49,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:05:49,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:05:49,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:05:49,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:05:49,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:05:49,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:05:49,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:05:49,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:05:49,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:05:49,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:05:49,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:05:49,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:05:49,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:05:49,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:05:49,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:05:49,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:05:49,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:05:49,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:05:49,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:05:49,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:05:49,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:05:49,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:05:49,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:05:49,596 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:05:49,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:05:49,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:05:49,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:05:49,603 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:05:49,648 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:05:49,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:05:49,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:05:49,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:05:49,653 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:05:49,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:05:49,654 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:05:49,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:05:49,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:05:49,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:05:49,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:05:49,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:05:49,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:05:49,656 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:05:49,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:05:49,656 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:05:49,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:05:49,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:05:49,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:05:49,657 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:05:49,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:05:49,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:05:49,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:05:49,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:05:49,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:05:49,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:05:49,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:05:49,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:05:49,659 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:05:49,659 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:05:50,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:05:50,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:05:50,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:05:50,122 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:05:50,123 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:05:50,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-28 00:05:50,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4364ff6d/0220d16e10b64ec98c549dfb7b5cfb9a/FLAGe06e8f1b0 [2020-10-28 00:05:51,212 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:05:51,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-28 00:05:51,259 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4364ff6d/0220d16e10b64ec98c549dfb7b5cfb9a/FLAGe06e8f1b0 [2020-10-28 00:05:51,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4364ff6d/0220d16e10b64ec98c549dfb7b5cfb9a [2020-10-28 00:05:51,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:05:51,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:05:51,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:05:51,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:05:51,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:05:51,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:05:51" (1/1) ... [2020-10-28 00:05:51,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34b4b207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:05:51, skipping insertion in model container [2020-10-28 00:05:51,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:05:51" (1/1) ... [2020-10-28 00:05:51,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:05:51,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:05:52,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:05:52,558 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:05:52,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:05:52,946 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:05:52,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:05:52 WrapperNode [2020-10-28 00:05:52,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:05:52,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:05:52,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:05:52,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:05:52,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:05:52" (1/1) ... [2020-10-28 00:05:52,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:05:52" (1/1) ... [2020-10-28 00:05:53,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:05:52" (1/1) ... [2020-10-28 00:05:53,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:05:52" (1/1) ... [2020-10-28 00:05:53,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:05:52" (1/1) ... [2020-10-28 00:05:53,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:05:52" (1/1) ... [2020-10-28 00:05:53,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:05:52" (1/1) ... [2020-10-28 00:05:53,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:05:53,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:05:53,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:05:53,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:05:53,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:05:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:05:53,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:05:53,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:05:53,288 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:05:53,288 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:05:53,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:05:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:05:53,289 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:05:53,289 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:05:53,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:05:53,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:05:53,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:05:53,289 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:05:53,290 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:05:53,290 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:05:53,290 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:05:53,290 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:05:53,290 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:05:53,290 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:05:53,290 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:05:53,291 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:05:53,291 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:05:53,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:05:53,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:05:53,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:05:53,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:05:53,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:05:53,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:05:57,337 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:05:57,337 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:05:57,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:05:57 BoogieIcfgContainer [2020-10-28 00:05:57,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:05:57,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:05:57,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:05:57,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:05:57,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:05:51" (1/3) ... [2020-10-28 00:05:57,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fac0e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:05:57, skipping insertion in model container [2020-10-28 00:05:57,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:05:52" (2/3) ... [2020-10-28 00:05:57,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fac0e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:05:57, skipping insertion in model container [2020-10-28 00:05:57,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:05:57" (3/3) ... [2020-10-28 00:05:57,356 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-28 00:05:57,369 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:05:57,375 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:05:57,389 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:05:57,435 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:05:57,436 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:05:57,436 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:05:57,436 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:05:57,436 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:05:57,436 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:05:57,437 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:05:57,437 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:05:57,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states. [2020-10-28 00:05:57,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:05:57,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:05:57,520 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] [2020-10-28 00:05:57,520 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:05:57,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:05:57,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1515842327, now seen corresponding path program 1 times [2020-10-28 00:05:57,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:05:57,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406585126] [2020-10-28 00:05:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:05:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:05:58,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:58,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:59,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:05:59,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:00,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:01,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:01,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:03,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:03,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:06:03,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:06:03,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:06:03,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:03,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:06:03,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:06:03,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:06:03,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:06:05,154 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-28 00:06:05,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:05,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:05,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:05,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:05,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:05,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 00:06:05,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:05,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:05,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:05,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:05,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:05,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406585126] [2020-10-28 00:06:05,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:06:05,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:06:05,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994052853] [2020-10-28 00:06:05,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:06:05,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:05,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:06:05,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:06:05,306 INFO L87 Difference]: Start difference. First operand 1199 states. Second operand 6 states. [2020-10-28 00:06:07,400 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-28 00:06:18,328 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 537 [2020-10-28 00:06:23,232 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-28 00:06:23,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:23,626 INFO L93 Difference]: Finished difference Result 2160 states and 3672 transitions. [2020-10-28 00:06:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:06:23,628 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-28 00:06:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:06:23,664 INFO L225 Difference]: With dead ends: 2160 [2020-10-28 00:06:23,664 INFO L226 Difference]: Without dead ends: 1712 [2020-10-28 00:06:23,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:06:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2020-10-28 00:06:23,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1557. [2020-10-28 00:06:23,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1557 states. [2020-10-28 00:06:23,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 2051 transitions. [2020-10-28 00:06:23,866 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 2051 transitions. Word has length 57 [2020-10-28 00:06:23,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:06:23,867 INFO L481 AbstractCegarLoop]: Abstraction has 1557 states and 2051 transitions. [2020-10-28 00:06:23,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:06:23,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 2051 transitions. [2020-10-28 00:06:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:06:23,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:23,872 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] [2020-10-28 00:06:23,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:06:23,873 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:23,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:23,874 INFO L82 PathProgramCache]: Analyzing trace with hash -474545896, now seen corresponding path program 1 times [2020-10-28 00:06:23,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:23,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169798883] [2020-10-28 00:06:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:24,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:24,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:24,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:25,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:25,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:26,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:27,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:28,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:28,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:28,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:06:28,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:06:29,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 00:06:29,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:29,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:06:29,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:06:29,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:06:29,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:31,007 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-28 00:06:31,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:31,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:31,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:31,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:31,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:31,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-28 00:06:31,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:31,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:31,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:31,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:31,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:31,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169798883] [2020-10-28 00:06:31,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:06:31,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:06:31,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393759225] [2020-10-28 00:06:31,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:06:31,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:31,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:06:31,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:06:31,120 INFO L87 Difference]: Start difference. First operand 1557 states and 2051 transitions. Second operand 6 states. [2020-10-28 00:06:33,152 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-28 00:06:41,922 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 537 [2020-10-28 00:06:43,905 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-28 00:06:45,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:06:45,054 INFO L93 Difference]: Finished difference Result 4270 states and 5998 transitions. [2020-10-28 00:06:45,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:06:45,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-28 00:06:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:06:45,076 INFO L225 Difference]: With dead ends: 4270 [2020-10-28 00:06:45,076 INFO L226 Difference]: Without dead ends: 3475 [2020-10-28 00:06:45,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:06:45,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2020-10-28 00:06:45,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 2511. [2020-10-28 00:06:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-10-28 00:06:45,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 3416 transitions. [2020-10-28 00:06:45,232 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 3416 transitions. Word has length 57 [2020-10-28 00:06:45,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:06:45,233 INFO L481 AbstractCegarLoop]: Abstraction has 2511 states and 3416 transitions. [2020-10-28 00:06:45,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:06:45,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 3416 transitions. [2020-10-28 00:06:45,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:06:45,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:45,237 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] [2020-10-28 00:06:45,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:06:45,237 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:45,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:45,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1354919180, now seen corresponding path program 1 times [2020-10-28 00:06:45,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:45,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322657166] [2020-10-28 00:06:45,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:45,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:45,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:45,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:45,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:47,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:48,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:49,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:49,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:50,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:50,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:06:50,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:06:50,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:06:50,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:50,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:06:50,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:06:50,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:06:50,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:52,325 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-28 00:06:52,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:06:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:52,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:52,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:06:52,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:06:52,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:06:52,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 00:06:52,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:06:52,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:06:52,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:06:52,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:06:52,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:06:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:06:52,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322657166] [2020-10-28 00:06:52,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:06:52,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:06:52,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541478427] [2020-10-28 00:06:52,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:06:52,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:06:52,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:06:52,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:06:52,422 INFO L87 Difference]: Start difference. First operand 2511 states and 3416 transitions. Second operand 6 states. [2020-10-28 00:06:54,527 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-28 00:07:04,131 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 537 [2020-10-28 00:07:06,545 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-28 00:07:07,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:07,142 INFO L93 Difference]: Finished difference Result 8934 states and 12946 transitions. [2020-10-28 00:07:07,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:07:07,143 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-28 00:07:07,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:07,183 INFO L225 Difference]: With dead ends: 8934 [2020-10-28 00:07:07,183 INFO L226 Difference]: Without dead ends: 7950 [2020-10-28 00:07:07,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:07:07,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7950 states. [2020-10-28 00:07:07,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7950 to 6099. [2020-10-28 00:07:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6099 states. [2020-10-28 00:07:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6099 states to 6099 states and 8613 transitions. [2020-10-28 00:07:07,520 INFO L78 Accepts]: Start accepts. Automaton has 6099 states and 8613 transitions. Word has length 57 [2020-10-28 00:07:07,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:07,525 INFO L481 AbstractCegarLoop]: Abstraction has 6099 states and 8613 transitions. [2020-10-28 00:07:07,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:07:07,525 INFO L276 IsEmpty]: Start isEmpty. Operand 6099 states and 8613 transitions. [2020-10-28 00:07:07,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 00:07:07,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:07,531 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] [2020-10-28 00:07:07,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:07:07,531 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:07,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:07,532 INFO L82 PathProgramCache]: Analyzing trace with hash 266436195, now seen corresponding path program 1 times [2020-10-28 00:07:07,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:07,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328600865] [2020-10-28 00:07:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:07,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:07,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:08,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:08,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:08,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:09,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:10,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:12,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:12,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:12,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:12,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 00:07:12,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:07:12,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 00:07:12,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:12,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 00:07:12,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:07:12,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 00:07:12,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:14,934 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-28 00:07:14,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:14,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:14,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:14,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:14,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:14,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 00:07:14,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:14,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:14,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:14,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:14,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:15,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:15,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328600865] [2020-10-28 00:07:15,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:15,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 00:07:15,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412160200] [2020-10-28 00:07:15,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 00:07:15,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:15,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 00:07:15,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 00:07:15,018 INFO L87 Difference]: Start difference. First operand 6099 states and 8613 transitions. Second operand 10 states. [2020-10-28 00:07:17,261 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 546 [2020-10-28 00:07:25,911 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-28 00:07:29,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:29,970 INFO L93 Difference]: Finished difference Result 15107 states and 21907 transitions. [2020-10-28 00:07:29,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 00:07:29,971 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-28 00:07:29,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:30,045 INFO L225 Difference]: With dead ends: 15107 [2020-10-28 00:07:30,045 INFO L226 Difference]: Without dead ends: 15102 [2020-10-28 00:07:30,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 00:07:30,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15102 states. [2020-10-28 00:07:30,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15102 to 6111. [2020-10-28 00:07:30,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6111 states. [2020-10-28 00:07:30,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6111 states to 6111 states and 8632 transitions. [2020-10-28 00:07:30,571 INFO L78 Accepts]: Start accepts. Automaton has 6111 states and 8632 transitions. Word has length 59 [2020-10-28 00:07:30,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:30,571 INFO L481 AbstractCegarLoop]: Abstraction has 6111 states and 8632 transitions. [2020-10-28 00:07:30,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 00:07:30,571 INFO L276 IsEmpty]: Start isEmpty. Operand 6111 states and 8632 transitions. [2020-10-28 00:07:30,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 00:07:30,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:30,577 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] [2020-10-28 00:07:30,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:07:30,578 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:30,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:30,578 INFO L82 PathProgramCache]: Analyzing trace with hash -2030479084, now seen corresponding path program 1 times [2020-10-28 00:07:30,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:30,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158207135] [2020-10-28 00:07:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:30,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:30,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:31,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:31,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:31,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:32,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:32,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:32,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:33,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:34,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:35,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:35,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 00:07:35,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:07:35,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 00:07:35,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:35,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 00:07:35,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:07:35,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:07:35,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:37,822 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-28 00:07:37,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:37,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:37,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:37,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:37,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:37,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 00:07:37,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:37,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:37,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:37,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:37,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:37,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158207135] [2020-10-28 00:07:37,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:37,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 00:07:37,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079143465] [2020-10-28 00:07:37,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 00:07:37,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:37,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 00:07:37,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 00:07:37,908 INFO L87 Difference]: Start difference. First operand 6111 states and 8632 transitions. Second operand 10 states. [2020-10-28 00:07:40,126 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 550 [2020-10-28 00:07:47,863 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-28 00:07:50,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:50,472 INFO L93 Difference]: Finished difference Result 15478 states and 22921 transitions. [2020-10-28 00:07:50,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 00:07:50,473 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-28 00:07:50,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:50,499 INFO L225 Difference]: With dead ends: 15478 [2020-10-28 00:07:50,500 INFO L226 Difference]: Without dead ends: 11877 [2020-10-28 00:07:50,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:07:50,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11877 states. [2020-10-28 00:07:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11877 to 6111. [2020-10-28 00:07:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6111 states. [2020-10-28 00:07:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6111 states to 6111 states and 8631 transitions. [2020-10-28 00:07:50,882 INFO L78 Accepts]: Start accepts. Automaton has 6111 states and 8631 transitions. Word has length 59 [2020-10-28 00:07:50,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:50,883 INFO L481 AbstractCegarLoop]: Abstraction has 6111 states and 8631 transitions. [2020-10-28 00:07:50,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 00:07:50,883 INFO L276 IsEmpty]: Start isEmpty. Operand 6111 states and 8631 transitions. [2020-10-28 00:07:50,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 00:07:50,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:50,888 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] [2020-10-28 00:07:50,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:07:50,889 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:50,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:50,889 INFO L82 PathProgramCache]: Analyzing trace with hash -29495558, now seen corresponding path program 1 times [2020-10-28 00:07:50,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:50,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459001086] [2020-10-28 00:07:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:50,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:51,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:51,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:51,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:52,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:52,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:53,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:53,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:53,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:55,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:55,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 00:07:55,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:07:55,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 00:07:55,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:55,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 00:07:55,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:07:55,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 00:07:55,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:58,056 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-28 00:07:58,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:58,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:58,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:58,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:58,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:58,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:07:58,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:58,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:58,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:58,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:58,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:58,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459001086] [2020-10-28 00:07:58,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:58,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 00:07:58,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829014574] [2020-10-28 00:07:58,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 00:07:58,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:58,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 00:07:58,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-28 00:07:58,129 INFO L87 Difference]: Start difference. First operand 6111 states and 8631 transitions. Second operand 10 states. [2020-10-28 00:08:00,107 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-28 00:08:07,353 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification that was a NOOP. DAG size: 538 [2020-10-28 00:08:09,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:09,438 INFO L93 Difference]: Finished difference Result 15416 states and 22838 transitions. [2020-10-28 00:08:09,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 00:08:09,438 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-28 00:08:09,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:09,465 INFO L225 Difference]: With dead ends: 15416 [2020-10-28 00:08:09,465 INFO L226 Difference]: Without dead ends: 11865 [2020-10-28 00:08:09,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-10-28 00:08:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11865 states. [2020-10-28 00:08:09,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11865 to 6099. [2020-10-28 00:08:09,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6099 states. [2020-10-28 00:08:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6099 states to 6099 states and 8614 transitions. [2020-10-28 00:08:09,966 INFO L78 Accepts]: Start accepts. Automaton has 6099 states and 8614 transitions. Word has length 59 [2020-10-28 00:08:09,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:09,968 INFO L481 AbstractCegarLoop]: Abstraction has 6099 states and 8614 transitions. [2020-10-28 00:08:09,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 00:08:09,968 INFO L276 IsEmpty]: Start isEmpty. Operand 6099 states and 8614 transitions. [2020-10-28 00:08:09,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:08:09,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:09,973 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] [2020-10-28 00:08:09,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:08:09,974 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:09,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:09,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1316113933, now seen corresponding path program 1 times [2020-10-28 00:08:09,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:09,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68810945] [2020-10-28 00:08:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:10,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:10,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:10,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:10,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:11,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:15,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:15,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:08:15,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:08:15,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 00:08:15,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:15,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:08:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:08:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 00:08:15,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:17,063 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-28 00:08:17,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:17,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:17,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:17,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:17,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:17,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 00:08:17,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:17,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:17,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:17,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:17,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:17,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68810945] [2020-10-28 00:08:17,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:17,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:08:17,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665500791] [2020-10-28 00:08:17,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:08:17,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:17,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:08:17,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:08:17,132 INFO L87 Difference]: Start difference. First operand 6099 states and 8614 transitions. Second operand 4 states. [2020-10-28 00:08:23,658 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 540 [2020-10-28 00:08:24,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:24,931 INFO L93 Difference]: Finished difference Result 11451 states and 16710 transitions. [2020-10-28 00:08:24,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:08:24,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-28 00:08:24,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:24,948 INFO L225 Difference]: With dead ends: 11451 [2020-10-28 00:08:24,949 INFO L226 Difference]: Without dead ends: 7364 [2020-10-28 00:08:24,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:08:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7364 states. [2020-10-28 00:08:25,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7364 to 7361. [2020-10-28 00:08:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7361 states. [2020-10-28 00:08:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7361 states to 7361 states and 10404 transitions. [2020-10-28 00:08:25,429 INFO L78 Accepts]: Start accepts. Automaton has 7361 states and 10404 transitions. Word has length 60 [2020-10-28 00:08:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:25,430 INFO L481 AbstractCegarLoop]: Abstraction has 7361 states and 10404 transitions. [2020-10-28 00:08:25,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:08:25,430 INFO L276 IsEmpty]: Start isEmpty. Operand 7361 states and 10404 transitions. [2020-10-28 00:08:25,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:08:25,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:25,436 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] [2020-10-28 00:08:25,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:08:25,436 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:25,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:25,437 INFO L82 PathProgramCache]: Analyzing trace with hash -805714051, now seen corresponding path program 1 times [2020-10-28 00:08:25,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:25,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826908387] [2020-10-28 00:08:25,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:25,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:25,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:25,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:26,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:27,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:30,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:30,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:08:30,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:08:30,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 00:08:30,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:30,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:08:30,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:08:30,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 00:08:30,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:32,449 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-28 00:08:32,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:32,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:32,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:32,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:32,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:32,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 00:08:32,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:32,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:32,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:32,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:32,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:32,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826908387] [2020-10-28 00:08:32,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:32,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:08:32,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827042727] [2020-10-28 00:08:32,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:08:32,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:32,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:08:32,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:08:32,527 INFO L87 Difference]: Start difference. First operand 7361 states and 10404 transitions. Second operand 4 states. [2020-10-28 00:08:39,168 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 540 [2020-10-28 00:08:40,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:40,155 INFO L93 Difference]: Finished difference Result 14954 states and 21688 transitions. [2020-10-28 00:08:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:08:40,156 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-28 00:08:40,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:40,175 INFO L225 Difference]: With dead ends: 14954 [2020-10-28 00:08:40,175 INFO L226 Difference]: Without dead ends: 9265 [2020-10-28 00:08:40,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:08:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9265 states. [2020-10-28 00:08:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9265 to 9262. [2020-10-28 00:08:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9262 states. [2020-10-28 00:08:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9262 states to 9262 states and 13032 transitions. [2020-10-28 00:08:40,706 INFO L78 Accepts]: Start accepts. Automaton has 9262 states and 13032 transitions. Word has length 60 [2020-10-28 00:08:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:40,706 INFO L481 AbstractCegarLoop]: Abstraction has 9262 states and 13032 transitions. [2020-10-28 00:08:40,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:08:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 9262 states and 13032 transitions. [2020-10-28 00:08:40,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 00:08:40,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:40,713 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] [2020-10-28 00:08:40,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:08:40,713 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:40,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:40,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1247524360, now seen corresponding path program 1 times [2020-10-28 00:08:40,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:40,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685772392] [2020-10-28 00:08:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:40,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:40,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:41,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:41,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:42,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:42,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:42,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:45,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:45,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 00:08:45,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:08:45,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:08:45,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:45,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:08:45,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:08:45,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:08:45,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:47,889 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-28 00:08:47,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:47,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:47,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:47,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:47,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:47,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 00:08:47,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:47,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:47,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:47,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:47,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:48,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685772392] [2020-10-28 00:08:48,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:48,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:08:48,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635980082] [2020-10-28 00:08:48,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:08:48,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:48,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:08:48,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:08:48,037 INFO L87 Difference]: Start difference. First operand 9262 states and 13032 transitions. Second operand 11 states. [2020-10-28 00:08:50,030 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-28 00:08:58,395 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 540 [2020-10-28 00:09:00,644 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification that was a NOOP. DAG size: 548 [2020-10-28 00:09:03,565 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 543 [2020-10-28 00:09:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:06,934 INFO L93 Difference]: Finished difference Result 35327 states and 50220 transitions. [2020-10-28 00:09:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 00:09:06,934 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-10-28 00:09:06,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:07,002 INFO L225 Difference]: With dead ends: 35327 [2020-10-28 00:09:07,003 INFO L226 Difference]: Without dead ends: 35322 [2020-10-28 00:09:07,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2020-10-28 00:09:07,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35322 states. [2020-10-28 00:09:08,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35322 to 9247. [2020-10-28 00:09:08,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9247 states. [2020-10-28 00:09:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9247 states to 9247 states and 13009 transitions. [2020-10-28 00:09:08,184 INFO L78 Accepts]: Start accepts. Automaton has 9247 states and 13009 transitions. Word has length 62 [2020-10-28 00:09:08,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:08,184 INFO L481 AbstractCegarLoop]: Abstraction has 9247 states and 13009 transitions. [2020-10-28 00:09:08,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:09:08,184 INFO L276 IsEmpty]: Start isEmpty. Operand 9247 states and 13009 transitions. [2020-10-28 00:09:08,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 00:09:08,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:08,190 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] [2020-10-28 00:09:08,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:09:08,190 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:08,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:08,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2121263992, now seen corresponding path program 1 times [2020-10-28 00:09:08,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:08,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366451421] [2020-10-28 00:09:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:08,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:08,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:08,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:09,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:09,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:10,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:11,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:11,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:13,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:13,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 00:09:13,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:09:13,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:09:13,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:13,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 00:09:13,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:09:13,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 00:09:13,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:15,376 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-28 00:09:15,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:15,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:15,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:15,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:15,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:15,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:09:15,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:15,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:15,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:15,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366451421] [2020-10-28 00:09:15,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:15,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 00:09:15,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066285660] [2020-10-28 00:09:15,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 00:09:15,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:15,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 00:09:15,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 00:09:15,427 INFO L87 Difference]: Start difference. First operand 9247 states and 13009 transitions. Second operand 10 states. [2020-10-28 00:09:17,396 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-28 00:09:25,135 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification that was a NOOP. DAG size: 538