/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:39:59,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:39:59,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:39:59,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:39:59,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:39:59,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:39:59,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:39:59,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:39:59,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:39:59,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:39:59,496 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:39:59,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:39:59,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:39:59,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:39:59,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:39:59,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:39:59,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:39:59,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:39:59,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:39:59,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:39:59,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:39:59,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:39:59,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:39:59,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:39:59,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:39:59,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:39:59,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:39:59,545 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:39:59,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:39:59,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:39:59,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:39:59,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:39:59,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:39:59,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:39:59,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:39:59,552 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:39:59,553 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:39:59,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:39:59,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:39:59,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:39:59,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:39:59,556 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 18:39:59,582 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:39:59,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:39:59,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:39:59,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:39:59,584 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:39:59,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:39:59,584 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:39:59,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:39:59,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:39:59,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:39:59,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:39:59,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:39:59,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:39:59,586 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:39:59,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:39:59,586 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:39:59,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:39:59,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:39:59,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:39:59,587 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:39:59,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:39:59,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:39:59,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:39:59,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:39:59,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:39:59,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:39:59,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:39:59,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:39:59,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:39:59,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:39:59,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:40:00,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:40:00,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:40:00,041 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:40:00,041 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:40:00,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c [2020-10-28 18:40:00,113 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/310bac435/4fccf66c2af64161bdca72bd52d374de/FLAG07131a828 [2020-10-28 18:40:01,289 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:40:01,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c [2020-10-28 18:40:01,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/310bac435/4fccf66c2af64161bdca72bd52d374de/FLAG07131a828 [2020-10-28 18:40:01,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/310bac435/4fccf66c2af64161bdca72bd52d374de [2020-10-28 18:40:01,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:40:01,650 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:40:01,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:40:01,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:40:01,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:40:01,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:40:01" (1/1) ... [2020-10-28 18:40:01,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c1bba0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:01, skipping insertion in model container [2020-10-28 18:40:01,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:40:01" (1/1) ... [2020-10-28 18:40:01,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:40:01,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:40:03,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:40:03,943 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:40:04,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:40:04,953 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:40:04,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:04 WrapperNode [2020-10-28 18:40:04,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:40:04,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:40:04,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:40:04,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:40:04,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:04" (1/1) ... [2020-10-28 18:40:04,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:04" (1/1) ... [2020-10-28 18:40:05,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:04" (1/1) ... [2020-10-28 18:40:05,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:04" (1/1) ... [2020-10-28 18:40:05,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:04" (1/1) ... [2020-10-28 18:40:05,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:04" (1/1) ... [2020-10-28 18:40:05,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:04" (1/1) ... [2020-10-28 18:40:05,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:40:05,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:40:05,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:40:05,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:40:05,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:04" (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 18:40:05,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:40:05,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:40:05,452 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:40:05,453 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:40:05,453 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:40:05,453 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:40:05,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:40:05,453 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:40:05,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:40:05,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:40:05,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:40:05,454 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:40:05,454 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:40:05,454 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:40:05,454 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:40:05,455 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:40:05,455 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:40:05,455 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:40:05,455 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:40:05,455 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 18:40:05,455 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-28 18:40:05,455 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:40:05,456 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:40:05,456 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:40:05,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:40:05,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:40:05,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:40:05,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:40:05,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:40:05,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:40:13,194 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:40:13,198 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:40:13,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:40:13 BoogieIcfgContainer [2020-10-28 18:40:13,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:40:13,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:40:13,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:40:13,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:40:13,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:40:01" (1/3) ... [2020-10-28 18:40:13,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643f9709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:40:13, skipping insertion in model container [2020-10-28 18:40:13,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:40:04" (2/3) ... [2020-10-28 18:40:13,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643f9709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:40:13, skipping insertion in model container [2020-10-28 18:40:13,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:40:13" (3/3) ... [2020-10-28 18:40:13,233 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+sep-reducer.c [2020-10-28 18:40:13,246 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:40:13,252 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:40:13,266 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:40:13,311 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:40:13,311 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:40:13,311 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:40:13,311 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:40:13,312 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:40:13,312 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:40:13,312 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:40:13,312 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:40:13,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states. [2020-10-28 18:40:13,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 18:40:13,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:40:13,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:40:13,416 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:40:13,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:40:13,432 INFO L82 PathProgramCache]: Analyzing trace with hash -80909251, now seen corresponding path program 1 times [2020-10-28 18:40:13,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:40:13,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319348304] [2020-10-28 18:40:13,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:40:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:40:14,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:15,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:15,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:15,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:15,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:17,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:19,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:40:19,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 18:40:19,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:40:19,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-28 18:40:19,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:40:19,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:40:19,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:40:19,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:40:19,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:40:19,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:40:26,410 WARN L193 SmtUtils]: Spent 6.71 s on a formula simplification that was a NOOP. DAG size: 1084 [2020-10-28 18:40:26,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:40:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:40:26,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:40:26,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:40:26,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:40:26,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:40:26,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-28 18:40:26,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:40:26,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:40:26,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:40:26,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:40:26,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:40:26,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:40:26,859 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 18:40:26,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319348304] [2020-10-28 18:40:26,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:40:26,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:40:26,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525716066] [2020-10-28 18:40:26,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:40:26,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:40:26,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:40:26,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:40:26,894 INFO L87 Difference]: Start difference. First operand 2550 states. Second operand 6 states. [2020-10-28 18:40:34,002 WARN L193 SmtUtils]: Spent 6.90 s on a formula simplification that was a NOOP. DAG size: 1092 [2020-10-28 18:41:10,588 WARN L193 SmtUtils]: Spent 6.73 s on a formula simplification that was a NOOP. DAG size: 1090 [2020-10-28 18:41:11,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:41:11,996 INFO L93 Difference]: Finished difference Result 3908 states and 6681 transitions. [2020-10-28 18:41:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:41:12,005 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 92 [2020-10-28 18:41:12,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:41:12,041 INFO L225 Difference]: With dead ends: 3908 [2020-10-28 18:41:12,042 INFO L226 Difference]: Without dead ends: 2624 [2020-10-28 18:41:12,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:41:12,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2020-10-28 18:41:12,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2538. [2020-10-28 18:41:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2538 states. [2020-10-28 18:41:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2538 states to 2538 states and 3342 transitions. [2020-10-28 18:41:12,292 INFO L78 Accepts]: Start accepts. Automaton has 2538 states and 3342 transitions. Word has length 92 [2020-10-28 18:41:12,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:41:12,294 INFO L481 AbstractCegarLoop]: Abstraction has 2538 states and 3342 transitions. [2020-10-28 18:41:12,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:41:12,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2538 states and 3342 transitions. [2020-10-28 18:41:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 18:41:12,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:41:12,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:41:12,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:41:12,310 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:41:12,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:41:12,311 INFO L82 PathProgramCache]: Analyzing trace with hash -665978351, now seen corresponding path program 1 times [2020-10-28 18:41:12,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:41:12,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82453477] [2020-10-28 18:41:12,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:41:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:12,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:12,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:13,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:13,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:13,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:13,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:15,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:15,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:17,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:17,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 18:41:17,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:41:17,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 18:41:17,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:17,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:17,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:41:17,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:41:17,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 18:41:17,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:41:24,673 WARN L193 SmtUtils]: Spent 6.85 s on a formula simplification that was a NOOP. DAG size: 1084 [2020-10-28 18:41:24,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:41:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:24,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:24,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:24,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:41:24,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:41:24,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-28 18:41:24,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:24,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:24,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:41:24,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:41:24,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:41:24,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:41:24,932 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 18:41:24,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82453477] [2020-10-28 18:41:24,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:41:24,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:41:24,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110923771] [2020-10-28 18:41:24,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:41:24,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:41:24,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:41:24,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:41:24,935 INFO L87 Difference]: Start difference. First operand 2538 states and 3342 transitions. Second operand 6 states. [2020-10-28 18:41:32,075 WARN L193 SmtUtils]: Spent 6.97 s on a formula simplification that was a NOOP. DAG size: 1093 [2020-10-28 18:41:54,103 WARN L193 SmtUtils]: Spent 6.93 s on a formula simplification that was a NOOP. DAG size: 1091 [2020-10-28 18:41:55,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:41:55,564 INFO L93 Difference]: Finished difference Result 3695 states and 4899 transitions. [2020-10-28 18:41:55,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:41:55,564 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 92 [2020-10-28 18:41:55,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:41:55,578 INFO L225 Difference]: With dead ends: 3695 [2020-10-28 18:41:55,578 INFO L226 Difference]: Without dead ends: 2449 [2020-10-28 18:41:55,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:41:55,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2020-10-28 18:41:55,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 2339. [2020-10-28 18:41:55,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2339 states. [2020-10-28 18:41:55,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 3163 transitions. [2020-10-28 18:41:55,722 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 3163 transitions. Word has length 92 [2020-10-28 18:41:55,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:41:55,725 INFO L481 AbstractCegarLoop]: Abstraction has 2339 states and 3163 transitions. [2020-10-28 18:41:55,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:41:55,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 3163 transitions. [2020-10-28 18:41:55,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 18:41:55,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:41:55,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:41:55,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:41:55,732 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:41:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:41:55,733 INFO L82 PathProgramCache]: Analyzing trace with hash -829321085, now seen corresponding path program 1 times [2020-10-28 18:41:55,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:41:55,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875680002] [2020-10-28 18:41:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:41:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:55,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:56,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:56,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:56,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:56,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:59,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:00,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:00,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:00,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 18:42:00,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:42:00,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5096 [2020-10-28 18:42:00,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:00,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:00,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:42:00,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:42:00,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 18:42:00,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:08,165 WARN L193 SmtUtils]: Spent 6.85 s on a formula simplification that was a NOOP. DAG size: 1084 [2020-10-28 18:42:08,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:42:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:08,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:08,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:08,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:42:08,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:42:08,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-28 18:42:08,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:08,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:08,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:42:08,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:42:08,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:42:08,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:08,442 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 18:42:08,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875680002] [2020-10-28 18:42:08,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:42:08,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:42:08,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825063555] [2020-10-28 18:42:08,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:42:08,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:42:08,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:42:08,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:42:08,446 INFO L87 Difference]: Start difference. First operand 2339 states and 3163 transitions. Second operand 6 states. [2020-10-28 18:42:15,632 WARN L193 SmtUtils]: Spent 7.01 s on a formula simplification that was a NOOP. DAG size: 1092 [2020-10-28 18:42:36,019 WARN L193 SmtUtils]: Spent 6.78 s on a formula simplification that was a NOOP. DAG size: 1090 [2020-10-28 18:42:37,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:42:37,253 INFO L93 Difference]: Finished difference Result 4096 states and 5564 transitions. [2020-10-28 18:42:37,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:42:37,254 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 92 [2020-10-28 18:42:37,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:42:37,269 INFO L225 Difference]: With dead ends: 4096 [2020-10-28 18:42:37,270 INFO L226 Difference]: Without dead ends: 2845 [2020-10-28 18:42:37,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:42:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2020-10-28 18:42:37,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2772. [2020-10-28 18:42:37,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2772 states. [2020-10-28 18:42:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 3758 transitions. [2020-10-28 18:42:37,428 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 3758 transitions. Word has length 92 [2020-10-28 18:42:37,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:42:37,429 INFO L481 AbstractCegarLoop]: Abstraction has 2772 states and 3758 transitions. [2020-10-28 18:42:37,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:42:37,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 3758 transitions. [2020-10-28 18:42:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 18:42:37,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:42:37,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:42:37,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:42:37,434 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:42:37,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:42:37,435 INFO L82 PathProgramCache]: Analyzing trace with hash -776630561, now seen corresponding path program 1 times [2020-10-28 18:42:37,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:42:37,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922276349] [2020-10-28 18:42:37,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:42:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:37,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:37,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:37,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:38,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:38,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:39,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:40,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:42,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:42,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 18:42:42,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:42:42,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-28 18:42:42,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:42,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:42,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:42:42,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:42:42,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 18:42:42,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:49,801 WARN L193 SmtUtils]: Spent 6.95 s on a formula simplification that was a NOOP. DAG size: 1084 [2020-10-28 18:42:49,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:42:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:49,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:49,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:49,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:42:49,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:42:49,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-28 18:42:49,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:49,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:49,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:42:49,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:42:49,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:42:49,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:50,007 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 18:42:50,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922276349] [2020-10-28 18:42:50,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:42:50,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:42:50,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519625389] [2020-10-28 18:42:50,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:42:50,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:42:50,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:42:50,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:42:50,009 INFO L87 Difference]: Start difference. First operand 2772 states and 3758 transitions. Second operand 7 states. [2020-10-28 18:42:57,130 WARN L193 SmtUtils]: Spent 6.94 s on a formula simplification that was a NOOP. DAG size: 1094 [2020-10-28 18:43:17,366 WARN L193 SmtUtils]: Spent 7.03 s on a formula simplification that was a NOOP. DAG size: 1092 [2020-10-28 18:43:21,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:43:21,849 INFO L93 Difference]: Finished difference Result 4742 states and 6693 transitions. [2020-10-28 18:43:21,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:43:21,852 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-28 18:43:21,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:43:21,870 INFO L225 Difference]: With dead ends: 4742 [2020-10-28 18:43:21,870 INFO L226 Difference]: Without dead ends: 4105 [2020-10-28 18:43:21,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:43:21,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4105 states. [2020-10-28 18:43:22,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4105 to 2772. [2020-10-28 18:43:22,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2772 states. [2020-10-28 18:43:22,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 3757 transitions. [2020-10-28 18:43:22,076 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 3757 transitions. Word has length 94 [2020-10-28 18:43:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:43:22,077 INFO L481 AbstractCegarLoop]: Abstraction has 2772 states and 3757 transitions. [2020-10-28 18:43:22,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:43:22,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 3757 transitions. [2020-10-28 18:43:22,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 18:43:22,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:43:22,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:43:22,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:43:22,082 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:43:22,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:43:22,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1102996630, now seen corresponding path program 1 times [2020-10-28 18:43:22,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:43:22,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5385011] [2020-10-28 18:43:22,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:43:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:22,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:22,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:22,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:23,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:23,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:24,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:24,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:26,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:27,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:27,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 18:43:27,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:43:27,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-28 18:43:27,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:27,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:27,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:43:27,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:43:27,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 18:43:27,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:34,524 WARN L193 SmtUtils]: Spent 6.96 s on a formula simplification that was a NOOP. DAG size: 1084 [2020-10-28 18:43:34,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:43:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:34,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:34,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:34,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:43:34,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:43:34,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 18:43:34,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:34,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:43:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:43:34,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:43:34,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:34,689 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 18:43:34,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5385011] [2020-10-28 18:43:34,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:43:34,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:43:34,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428415153] [2020-10-28 18:43:34,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:43:34,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:43:34,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:43:34,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:43:34,691 INFO L87 Difference]: Start difference. First operand 2772 states and 3757 transitions. Second operand 8 states. [2020-10-28 18:43:41,905 WARN L193 SmtUtils]: Spent 7.06 s on a formula simplification that was a NOOP. DAG size: 1091