/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-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:50:54,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:50:54,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:50:54,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:50:54,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:50:54,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:50:54,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:50:54,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:50:54,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:50:54,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:50:54,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:50:54,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:50:54,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:50:54,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:50:54,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:50:54,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:50:54,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:50:54,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:50:54,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:50:54,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:50:54,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:50:54,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:50:54,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:50:54,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:50:54,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:50:54,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:50:54,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:50:54,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:50:54,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:50:54,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:50:54,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:50:54,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:50:54,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:50:54,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:50:54,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:50:54,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:50:54,424 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:50:54,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:50:54,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:50:54,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:50:54,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:50:54,434 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 18:50:54,492 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:50:54,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:50:54,497 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:50:54,498 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:50:54,498 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:50:54,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:50:54,499 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:50:54,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:50:54,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:50:54,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:50:54,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:50:54,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:50:54,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:50:54,502 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:50:54,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:50:54,502 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:50:54,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:50:54,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:50:54,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:50:54,503 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:50:54,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:50:54,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:50:54,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:50:54,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:50:54,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:50:54,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:50:54,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:50:54,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:50:54,505 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:50:54,505 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:50:54,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:50:54,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:50:54,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:50:54,998 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:50:54,998 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:50:54,999 INFO L432 ainManager$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.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:50:55,075 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ccd2832b/4610b3b88e764f508041063e5c8a9078/FLAGbdddb29c2 [2020-10-28 18:50:55,744 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:50:55,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:50:55,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ccd2832b/4610b3b88e764f508041063e5c8a9078/FLAGbdddb29c2 [2020-10-28 18:50:56,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ccd2832b/4610b3b88e764f508041063e5c8a9078 [2020-10-28 18:50:56,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:50:56,047 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:50:56,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:50:56,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:50:56,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:50:56,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:50:56" (1/1) ... [2020-10-28 18:50:56,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3af405a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56, skipping insertion in model container [2020-10-28 18:50:56,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:50:56" (1/1) ... [2020-10-28 18:50:56,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:50:56,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:50:56,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:50:56,549 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:50:56,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:50:56,738 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:50:56,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56 WrapperNode [2020-10-28 18:50:56,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:50:56,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:50:56,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:50:56,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:50:56,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (1/1) ... [2020-10-28 18:50:56,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (1/1) ... [2020-10-28 18:50:56,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (1/1) ... [2020-10-28 18:50:56,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (1/1) ... [2020-10-28 18:50:56,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (1/1) ... [2020-10-28 18:50:56,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (1/1) ... [2020-10-28 18:50:56,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (1/1) ... [2020-10-28 18:50:56,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:50:56,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:50:56,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:50:56,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:50:56,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:50:56,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:50:56,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:50:56,944 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:50:56,944 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:50:56,944 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:50:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:50:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:50:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:50:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:50:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:50:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:50:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:50:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:50:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:50:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:50:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:50:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:50:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:50:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:50:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:50:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:50:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:50:56,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:50:56,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:50:56,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:50:56,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:50:56,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:50:56,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:50:57,874 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:50:57,874 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:50:57,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:50:57 BoogieIcfgContainer [2020-10-28 18:50:57,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:50:57,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:50:57,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:50:57,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:50:57,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:50:56" (1/3) ... [2020-10-28 18:50:57,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b8307c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:50:57, skipping insertion in model container [2020-10-28 18:50:57,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:56" (2/3) ... [2020-10-28 18:50:57,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b8307c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:50:57, skipping insertion in model container [2020-10-28 18:50:57,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:50:57" (3/3) ... [2020-10-28 18:50:57,891 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:50:57,904 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:50:57,910 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:50:57,924 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:50:57,955 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:50:57,955 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:50:57,955 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:50:57,955 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:50:57,956 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:50:57,956 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:50:57,956 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:50:57,956 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:50:57,981 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states. [2020-10-28 18:50:57,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 18:50:57,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:57,992 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] [2020-10-28 18:50:57,992 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:57,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:58,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1313524885, now seen corresponding path program 1 times [2020-10-28 18:50:58,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:58,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379467879] [2020-10-28 18:50:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:58,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:58,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:58,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:00,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:00,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 18:51:00,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:51:00,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2127 [2020-10-28 18:51:00,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:00,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:00,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:00,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 18:51:00,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 18:51:00,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:51:00,697 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:51:00,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:00,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:00,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:00,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:00,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:00,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 18:51:00,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:00,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:00,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:00,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:00,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:00,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:51:00,791 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 18:51:00,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379467879] [2020-10-28 18:51:00,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:00,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:51:00,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000567761] [2020-10-28 18:51:00,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:51:00,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:00,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:51:00,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:51:00,832 INFO L87 Difference]: Start difference. First operand 170 states. Second operand 4 states. [2020-10-28 18:51:01,053 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:51:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:01,857 INFO L93 Difference]: Finished difference Result 321 states and 516 transitions. [2020-10-28 18:51:01,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:51:01,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-28 18:51:01,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:01,872 INFO L225 Difference]: With dead ends: 321 [2020-10-28 18:51:01,873 INFO L226 Difference]: Without dead ends: 241 [2020-10-28 18:51:01,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:51:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-28 18:51:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 238. [2020-10-28 18:51:01,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-28 18:51:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 355 transitions. [2020-10-28 18:51:01,987 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 355 transitions. Word has length 54 [2020-10-28 18:51:01,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:01,988 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 355 transitions. [2020-10-28 18:51:01,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:51:01,988 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 355 transitions. [2020-10-28 18:51:01,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:51:01,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:01,991 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 18:51:01,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:51:01,992 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:01,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:01,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1142379061, now seen corresponding path program 1 times [2020-10-28 18:51:01,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:01,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423066061] [2020-10-28 18:51:01,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:02,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:02,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:02,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:02,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:02,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:07,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:07,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:51:07,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:51:07,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:51:07,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:07,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:07,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:07,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 18:51:07,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:51:07,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 18:51:07,279 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:51:07,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:07,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:07,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:07,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:07,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:07,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:51:07,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:07,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:07,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:07,339 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 18:51:07,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423066061] [2020-10-28 18:51:07,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:07,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:51:07,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516825109] [2020-10-28 18:51:07,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:51:07,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:07,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:51:07,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:51:07,354 INFO L87 Difference]: Start difference. First operand 238 states and 355 transitions. Second operand 4 states. [2020-10-28 18:51:07,569 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 18:51:08,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:08,302 INFO L93 Difference]: Finished difference Result 574 states and 879 transitions. [2020-10-28 18:51:08,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:51:08,303 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 18:51:08,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:08,307 INFO L225 Difference]: With dead ends: 574 [2020-10-28 18:51:08,307 INFO L226 Difference]: Without dead ends: 407 [2020-10-28 18:51:08,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:51:08,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-10-28 18:51:08,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 404. [2020-10-28 18:51:08,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-10-28 18:51:08,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 607 transitions. [2020-10-28 18:51:08,371 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 607 transitions. Word has length 57 [2020-10-28 18:51:08,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:08,372 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 607 transitions. [2020-10-28 18:51:08,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:51:08,372 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 607 transitions. [2020-10-28 18:51:08,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:51:08,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:08,375 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 18:51:08,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:51:08,376 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:08,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:08,376 INFO L82 PathProgramCache]: Analyzing trace with hash -915987511, now seen corresponding path program 1 times [2020-10-28 18:51:08,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:08,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4851337] [2020-10-28 18:51:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:08,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:08,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:08,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:08,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:08,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:13,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:13,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:51:13,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:51:13,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4924 [2020-10-28 18:51:13,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:13,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:13,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:13,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 18:51:13,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:51:13,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:51:13,557 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:51:13,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:13,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:13,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:13,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:13,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:13,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:51:13,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:13,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:13,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:13,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:13,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:13,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 18:51:13,604 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 18:51:13,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4851337] [2020-10-28 18:51:13,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:13,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:51:13,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403864687] [2020-10-28 18:51:13,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:51:13,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:13,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:51:13,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:51:13,608 INFO L87 Difference]: Start difference. First operand 404 states and 607 transitions. Second operand 4 states. [2020-10-28 18:51:13,812 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 18:51:14,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:14,534 INFO L93 Difference]: Finished difference Result 978 states and 1493 transitions. [2020-10-28 18:51:14,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:51:14,537 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 18:51:14,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:14,542 INFO L225 Difference]: With dead ends: 978 [2020-10-28 18:51:14,542 INFO L226 Difference]: Without dead ends: 693 [2020-10-28 18:51:14,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:51:14,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2020-10-28 18:51:14,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 690. [2020-10-28 18:51:14,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2020-10-28 18:51:14,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1033 transitions. [2020-10-28 18:51:14,590 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1033 transitions. Word has length 57 [2020-10-28 18:51:14,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:14,590 INFO L481 AbstractCegarLoop]: Abstraction has 690 states and 1033 transitions. [2020-10-28 18:51:14,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:51:14,591 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1033 transitions. [2020-10-28 18:51:14,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:51:14,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:14,594 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 18:51:14,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:51:14,595 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:14,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:14,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1907474551, now seen corresponding path program 1 times [2020-10-28 18:51:14,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:14,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058069316] [2020-10-28 18:51:14,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:14,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:14,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:14,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:14,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:14,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:19,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:19,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:51:19,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:51:19,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:51:19,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:19,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:19,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:19,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 18:51:19,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 18:51:19,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:19,863 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:51:19,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:19,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:19,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:19,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:19,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:19,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:51:19,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:19,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:19,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:19,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:19,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:19,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:19,895 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 18:51:19,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058069316] [2020-10-28 18:51:19,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:19,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:51:19,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021501700] [2020-10-28 18:51:19,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:51:19,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:19,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:51:19,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:51:19,900 INFO L87 Difference]: Start difference. First operand 690 states and 1033 transitions. Second operand 4 states. [2020-10-28 18:51:20,102 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 18:51:20,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:20,902 INFO L93 Difference]: Finished difference Result 1766 states and 2659 transitions. [2020-10-28 18:51:20,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:51:20,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 18:51:20,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:20,911 INFO L225 Difference]: With dead ends: 1766 [2020-10-28 18:51:20,911 INFO L226 Difference]: Without dead ends: 1171 [2020-10-28 18:51:20,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:51:20,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2020-10-28 18:51:20,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1168. [2020-10-28 18:51:20,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1168 states. [2020-10-28 18:51:20,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1715 transitions. [2020-10-28 18:51:20,990 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1715 transitions. Word has length 57 [2020-10-28 18:51:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:20,990 INFO L481 AbstractCegarLoop]: Abstraction has 1168 states and 1715 transitions. [2020-10-28 18:51:20,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:51:20,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1715 transitions. [2020-10-28 18:51:20,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:51:20,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:20,997 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] [2020-10-28 18:51:20,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:51:20,998 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:20,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:20,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1674236509, now seen corresponding path program 1 times [2020-10-28 18:51:20,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:20,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687561222] [2020-10-28 18:51:20,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:21,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:21,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:21,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:21,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:21,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:23,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:23,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:51:23,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:51:23,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2944 [2020-10-28 18:51:23,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:23,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:23,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:51:23,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:51:23,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:51:23,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:51:24,371 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:51:24,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:24,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:24,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:24,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:24,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:24,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:51:24,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:24,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:24,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:24,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:24,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:51:24,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:24,432 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 18:51:24,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687561222] [2020-10-28 18:51:24,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:24,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:51:24,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875719561] [2020-10-28 18:51:24,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:51:24,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:24,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:51:24,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:51:24,436 INFO L87 Difference]: Start difference. First operand 1168 states and 1715 transitions. Second operand 8 states. [2020-10-28 18:51:24,645 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:51:25,372 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:51:26,136 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:51:26,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:26,342 INFO L93 Difference]: Finished difference Result 4420 states and 6538 transitions. [2020-10-28 18:51:26,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:51:26,343 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-28 18:51:26,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:26,368 INFO L225 Difference]: With dead ends: 4420 [2020-10-28 18:51:26,369 INFO L226 Difference]: Without dead ends: 3561 [2020-10-28 18:51:26,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:51:26,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2020-10-28 18:51:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 1196. [2020-10-28 18:51:26,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1196 states. [2020-10-28 18:51:26,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1727 transitions. [2020-10-28 18:51:26,524 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1727 transitions. Word has length 58 [2020-10-28 18:51:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:26,528 INFO L481 AbstractCegarLoop]: Abstraction has 1196 states and 1727 transitions. [2020-10-28 18:51:26,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:51:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1727 transitions. [2020-10-28 18:51:26,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:51:26,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:26,535 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] [2020-10-28 18:51:26,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:51:26,535 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:26,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:26,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1014371839, now seen corresponding path program 1 times [2020-10-28 18:51:26,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:26,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583386819] [2020-10-28 18:51:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:26,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:26,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:26,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:27,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:27,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:29,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:29,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:51:29,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:51:29,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2687 [2020-10-28 18:51:29,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:29,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:29,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:51:29,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:51:29,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:51:29,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:29,578 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:51:29,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:29,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:29,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:29,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:29,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:29,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:51:29,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:29,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:29,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:29,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:29,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:51:29,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:29,636 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 18:51:29,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583386819] [2020-10-28 18:51:29,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:29,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:51:29,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682474533] [2020-10-28 18:51:29,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:51:29,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:29,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:51:29,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:51:29,641 INFO L87 Difference]: Start difference. First operand 1196 states and 1727 transitions. Second operand 8 states. [2020-10-28 18:51:29,856 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:51:30,795 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:51:31,633 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:51:31,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:31,875 INFO L93 Difference]: Finished difference Result 5050 states and 7317 transitions. [2020-10-28 18:51:31,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:51:31,876 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-28 18:51:31,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:31,899 INFO L225 Difference]: With dead ends: 5050 [2020-10-28 18:51:31,899 INFO L226 Difference]: Without dead ends: 4245 [2020-10-28 18:51:31,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:51:31,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2020-10-28 18:51:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 1308. [2020-10-28 18:51:32,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1308 states. [2020-10-28 18:51:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 1847 transitions. [2020-10-28 18:51:32,057 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 1847 transitions. Word has length 58 [2020-10-28 18:51:32,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:32,059 INFO L481 AbstractCegarLoop]: Abstraction has 1308 states and 1847 transitions. [2020-10-28 18:51:32,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:51:32,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 1847 transitions. [2020-10-28 18:51:32,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:51:32,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:32,061 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] [2020-10-28 18:51:32,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:51:32,062 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:32,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:32,062 INFO L82 PathProgramCache]: Analyzing trace with hash -388207116, now seen corresponding path program 1 times [2020-10-28 18:51:32,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:32,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982414397] [2020-10-28 18:51:32,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:32,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:32,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:32,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:32,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:32,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:34,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:34,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:51:34,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:51:34,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2671 [2020-10-28 18:51:34,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:34,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:34,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:51:34,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:51:34,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 18:51:34,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:35,142 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:51:35,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:35,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:35,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:35,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:35,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:35,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 18:51:35,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:35,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:35,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:35,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:35,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:51:35,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:35,223 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 18:51:35,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982414397] [2020-10-28 18:51:35,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:35,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:51:35,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456660824] [2020-10-28 18:51:35,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:51:35,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:35,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:51:35,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:51:35,229 INFO L87 Difference]: Start difference. First operand 1308 states and 1847 transitions. Second operand 8 states. [2020-10-28 18:51:35,495 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:51:36,287 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:51:37,187 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:51:37,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:37,530 INFO L93 Difference]: Finished difference Result 6105 states and 8702 transitions. [2020-10-28 18:51:37,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:51:37,531 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-28 18:51:37,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:37,562 INFO L225 Difference]: With dead ends: 6105 [2020-10-28 18:51:37,563 INFO L226 Difference]: Without dead ends: 5258 [2020-10-28 18:51:37,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:51:37,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5258 states. [2020-10-28 18:51:37,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5258 to 1435. [2020-10-28 18:51:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1435 states. [2020-10-28 18:51:37,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 1972 transitions. [2020-10-28 18:51:37,767 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 1972 transitions. Word has length 58 [2020-10-28 18:51:37,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:37,768 INFO L481 AbstractCegarLoop]: Abstraction has 1435 states and 1972 transitions. [2020-10-28 18:51:37,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:51:37,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 1972 transitions. [2020-10-28 18:51:37,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:51:37,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:37,770 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 18:51:37,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:51:37,770 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:37,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:37,771 INFO L82 PathProgramCache]: Analyzing trace with hash 929553127, now seen corresponding path program 1 times [2020-10-28 18:51:37,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:37,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737359732] [2020-10-28 18:51:37,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:37,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:37,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:37,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:37,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:37,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:38,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:38,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:38,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:38,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:39,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:40,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:41,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:42,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:42,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:51:42,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:51:42,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:51:42,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:42,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:42,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:51:42,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 18:51:42,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 18:51:42,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:43,032 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:51:43,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:43,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:43,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:43,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:43,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:43,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:51:43,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:43,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:43,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:43,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:43,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:43,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:43,070 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 18:51:43,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737359732] [2020-10-28 18:51:43,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:43,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:51:43,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286631202] [2020-10-28 18:51:43,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:51:43,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:43,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:51:43,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:51:43,074 INFO L87 Difference]: Start difference. First operand 1435 states and 1972 transitions. Second operand 6 states. [2020-10-28 18:51:43,294 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:51:43,895 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:51:44,664 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:51:44,874 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:51:44,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:44,980 INFO L93 Difference]: Finished difference Result 3498 states and 4944 transitions. [2020-10-28 18:51:44,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:51:44,980 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-28 18:51:44,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:44,993 INFO L225 Difference]: With dead ends: 3498 [2020-10-28 18:51:44,993 INFO L226 Difference]: Without dead ends: 2783 [2020-10-28 18:51:44,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:51:45,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2020-10-28 18:51:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 1620. [2020-10-28 18:51:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1620 states. [2020-10-28 18:51:45,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 2251 transitions. [2020-10-28 18:51:45,206 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 2251 transitions. Word has length 59 [2020-10-28 18:51:45,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:45,206 INFO L481 AbstractCegarLoop]: Abstraction has 1620 states and 2251 transitions. [2020-10-28 18:51:45,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:51:45,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 2251 transitions. [2020-10-28 18:51:45,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:51:45,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:45,209 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 18:51:45,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:51:45,209 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:45,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:45,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1747762406, now seen corresponding path program 1 times [2020-10-28 18:51:45,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:45,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416484140] [2020-10-28 18:51:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:45,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:45,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:45,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:45,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:45,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:45,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:46,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:46,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:46,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:47,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:47,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:47,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:50,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:50,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:51:50,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:51:50,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:51:50,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:50,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:50,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:51:50,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:51:50,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:51:50,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:50,455 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:51:50,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:50,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:50,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:50,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:50,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:50,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:51:50,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:50,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:50,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:50,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:50,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:50,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:50,489 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 18:51:50,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416484140] [2020-10-28 18:51:50,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:50,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:51:50,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234807970] [2020-10-28 18:51:50,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:51:50,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:50,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:51:50,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:51:50,493 INFO L87 Difference]: Start difference. First operand 1620 states and 2251 transitions. Second operand 6 states. [2020-10-28 18:51:50,723 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:51:51,335 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:51:52,105 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:51:52,287 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:51:52,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:52,372 INFO L93 Difference]: Finished difference Result 4053 states and 5755 transitions. [2020-10-28 18:51:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:51:52,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-28 18:51:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:52,389 INFO L225 Difference]: With dead ends: 4053 [2020-10-28 18:51:52,389 INFO L226 Difference]: Without dead ends: 3338 [2020-10-28 18:51:52,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:51:52,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-10-28 18:51:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2011. [2020-10-28 18:51:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2011 states. [2020-10-28 18:51:52,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 2828 transitions. [2020-10-28 18:51:52,656 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 2828 transitions. Word has length 59 [2020-10-28 18:51:52,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:52,656 INFO L481 AbstractCegarLoop]: Abstraction has 2011 states and 2828 transitions. [2020-10-28 18:51:52,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:51:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 2828 transitions. [2020-10-28 18:51:52,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:51:52,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:52,659 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 18:51:52,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:51:52,659 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:52,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:52,660 INFO L82 PathProgramCache]: Analyzing trace with hash 890121976, now seen corresponding path program 1 times [2020-10-28 18:51:52,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:52,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044023408] [2020-10-28 18:51:52,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:52,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:52,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:52,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:52,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:52,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:53,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:53,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:53,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:53,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:53,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:53,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:53,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:57,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:57,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:51:57,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:51:57,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:51:57,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:57,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:57,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:51:57,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:51:57,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:51:57,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:57,888 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:51:57,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:57,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:57,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:57,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:57,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:57,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:51:57,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:57,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:57,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:57,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:57,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:57,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:57,917 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 18:51:57,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044023408] [2020-10-28 18:51:57,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:57,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:51:57,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850724770] [2020-10-28 18:51:57,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:51:57,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:57,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:51:57,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:51:57,920 INFO L87 Difference]: Start difference. First operand 2011 states and 2828 transitions. Second operand 6 states. [2020-10-28 18:51:58,141 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:51:58,775 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:51:59,443 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:51:59,628 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:51:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:59,727 INFO L93 Difference]: Finished difference Result 4390 states and 6237 transitions. [2020-10-28 18:51:59,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:51:59,727 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-28 18:51:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:59,756 INFO L225 Difference]: With dead ends: 4390 [2020-10-28 18:51:59,756 INFO L226 Difference]: Without dead ends: 3675 [2020-10-28 18:51:59,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:51:59,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-10-28 18:52:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2403. [2020-10-28 18:52:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2403 states. [2020-10-28 18:52:00,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 3397 transitions. [2020-10-28 18:52:00,078 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 3397 transitions. Word has length 59 [2020-10-28 18:52:00,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:00,078 INFO L481 AbstractCegarLoop]: Abstraction has 2403 states and 3397 transitions. [2020-10-28 18:52:00,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:52:00,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 3397 transitions. [2020-10-28 18:52:00,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 18:52:00,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:00,081 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] [2020-10-28 18:52:00,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:52:00,082 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:00,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:00,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1986047488, now seen corresponding path program 1 times [2020-10-28 18:52:00,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:00,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615132354] [2020-10-28 18:52:00,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:00,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:03,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:03,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:03,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:03,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:03,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:04,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:04,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:04,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:04,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:04,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:05,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:05,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 18:52:05,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-28 18:52:05,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:52:05,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:05,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:05,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:52:05,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 18:52:05,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 18:52:05,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:05,339 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:52:05,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:05,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:05,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:05,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:05,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:05,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:52:05,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:05,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:05,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:05,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:05,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:05,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:05,367 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 18:52:05,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615132354] [2020-10-28 18:52:05,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:05,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:52:05,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844201962] [2020-10-28 18:52:05,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:52:05,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:05,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:52:05,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:52:05,370 INFO L87 Difference]: Start difference. First operand 2403 states and 3397 transitions. Second operand 6 states. [2020-10-28 18:52:05,584 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:52:06,816 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:52:07,143 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:52:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:09,318 INFO L93 Difference]: Finished difference Result 15335 states and 22294 transitions. [2020-10-28 18:52:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:52:09,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-10-28 18:52:09,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:09,351 INFO L225 Difference]: With dead ends: 15335 [2020-10-28 18:52:09,352 INFO L226 Difference]: Without dead ends: 13437 [2020-10-28 18:52:09,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:52:09,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13437 states. [2020-10-28 18:52:10,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13437 to 7402. [2020-10-28 18:52:10,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7402 states. [2020-10-28 18:52:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7402 states to 7402 states and 10662 transitions. [2020-10-28 18:52:10,534 INFO L78 Accepts]: Start accepts. Automaton has 7402 states and 10662 transitions. Word has length 63 [2020-10-28 18:52:10,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:10,534 INFO L481 AbstractCegarLoop]: Abstraction has 7402 states and 10662 transitions. [2020-10-28 18:52:10,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:52:10,534 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states and 10662 transitions. [2020-10-28 18:52:10,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 18:52:10,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:10,539 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] [2020-10-28 18:52:10,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:52:10,539 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:10,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1780741756, now seen corresponding path program 1 times [2020-10-28 18:52:10,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:10,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918101803] [2020-10-28 18:52:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:10,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:10,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:10,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:10,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:10,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:10,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:12,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:12,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:12,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:12,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:12,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:12,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:13,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:14,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:14,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:14,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:14,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:15,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:15,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 18:52:15,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 18:52:15,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:52:15,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:15,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:15,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:52:15,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:52:15,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 18:52:15,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:15,789 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:52:15,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:15,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:15,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:15,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:15,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:15,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:52:15,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:15,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:15,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:15,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:15,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:52:15,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:15,840 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 18:52:15,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918101803] [2020-10-28 18:52:15,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:15,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:52:15,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054566317] [2020-10-28 18:52:15,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:52:15,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:15,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:52:15,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:52:15,843 INFO L87 Difference]: Start difference. First operand 7402 states and 10662 transitions. Second operand 6 states. [2020-10-28 18:52:16,062 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:52:16,830 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:52:17,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:17,400 INFO L93 Difference]: Finished difference Result 10757 states and 15591 transitions. [2020-10-28 18:52:17,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:52:17,401 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-10-28 18:52:17,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:17,413 INFO L225 Difference]: With dead ends: 10757 [2020-10-28 18:52:17,414 INFO L226 Difference]: Without dead ends: 5301 [2020-10-28 18:52:17,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:52:17,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2020-10-28 18:52:18,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 5285. [2020-10-28 18:52:18,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5285 states. [2020-10-28 18:52:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5285 states to 5285 states and 7603 transitions. [2020-10-28 18:52:18,096 INFO L78 Accepts]: Start accepts. Automaton has 5285 states and 7603 transitions. Word has length 63 [2020-10-28 18:52:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:18,097 INFO L481 AbstractCegarLoop]: Abstraction has 5285 states and 7603 transitions. [2020-10-28 18:52:18,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:52:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 5285 states and 7603 transitions. [2020-10-28 18:52:18,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 18:52:18,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:18,100 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] [2020-10-28 18:52:18,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:52:18,100 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:18,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1787659419, now seen corresponding path program 1 times [2020-10-28 18:52:18,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:18,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019874772] [2020-10-28 18:52:18,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:18,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:18,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:18,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:18,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:18,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:18,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:18,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:19,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:19,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:19,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:19,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:23,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:23,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 18:52:23,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:52:23,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:52:23,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:23,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:23,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:52:23,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 18:52:23,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 18:52:23,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:23,327 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:52:23,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:23,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:23,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:23,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:23,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:23,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:52:23,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:23,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:23,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:23,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:23,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:23,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:23,356 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 18:52:23,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019874772] [2020-10-28 18:52:23,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:23,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:52:23,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766332418] [2020-10-28 18:52:23,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:52:23,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:23,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:52:23,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:52:23,359 INFO L87 Difference]: Start difference. First operand 5285 states and 7603 transitions. Second operand 6 states. [2020-10-28 18:52:23,585 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:52:24,902 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:52:25,190 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:52:29,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:29,178 INFO L93 Difference]: Finished difference Result 40359 states and 59065 transitions. [2020-10-28 18:52:29,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:52:29,178 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-28 18:52:29,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:29,245 INFO L225 Difference]: With dead ends: 40359 [2020-10-28 18:52:29,246 INFO L226 Difference]: Without dead ends: 35559 [2020-10-28 18:52:29,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:52:29,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35559 states. [2020-10-28 18:52:31,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35559 to 18576. [2020-10-28 18:52:31,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18576 states. [2020-10-28 18:52:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18576 states to 18576 states and 27022 transitions. [2020-10-28 18:52:31,468 INFO L78 Accepts]: Start accepts. Automaton has 18576 states and 27022 transitions. Word has length 64 [2020-10-28 18:52:31,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:31,468 INFO L481 AbstractCegarLoop]: Abstraction has 18576 states and 27022 transitions. [2020-10-28 18:52:31,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:52:31,468 INFO L276 IsEmpty]: Start isEmpty. Operand 18576 states and 27022 transitions. [2020-10-28 18:52:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 18:52:31,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:31,473 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] [2020-10-28 18:52:31,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:52:31,474 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:31,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:31,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1355962137, now seen corresponding path program 1 times [2020-10-28 18:52:31,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:31,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669032613] [2020-10-28 18:52:31,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:31,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:31,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:31,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:31,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:31,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:32,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:35,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:35,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:35,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:35,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:35,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:35,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:35,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:36,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:36,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:36,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:36,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:36,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:36,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 18:52:36,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-28 18:52:36,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 18:52:36,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:36,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:36,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:52:36,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 18:52:36,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 18:52:36,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:36,741 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:52:36,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:36,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:36,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:36,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:36,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:36,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 18:52:36,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:36,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:36,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:36,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:36,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:36,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:36,763 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 18:52:36,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669032613] [2020-10-28 18:52:36,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:36,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:52:36,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119843618] [2020-10-28 18:52:36,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:52:36,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:36,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:52:36,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:52:36,765 INFO L87 Difference]: Start difference. First operand 18576 states and 27022 transitions. Second operand 6 states. [2020-10-28 18:52:36,977 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:52:38,505 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:52:38,956 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:52:52,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:52,681 INFO L93 Difference]: Finished difference Result 139881 states and 205245 transitions. [2020-10-28 18:52:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:52:52,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-28 18:52:52,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:53,141 INFO L225 Difference]: With dead ends: 139881 [2020-10-28 18:52:53,141 INFO L226 Difference]: Without dead ends: 122136 [2020-10-28 18:52:53,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:52:53,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122136 states. [2020-10-28 18:53:02,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122136 to 67765. [2020-10-28 18:53:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67765 states. [2020-10-28 18:53:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67765 states to 67765 states and 99081 transitions. [2020-10-28 18:53:02,512 INFO L78 Accepts]: Start accepts. Automaton has 67765 states and 99081 transitions. Word has length 64 [2020-10-28 18:53:02,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:02,512 INFO L481 AbstractCegarLoop]: Abstraction has 67765 states and 99081 transitions. [2020-10-28 18:53:02,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:53:02,513 INFO L276 IsEmpty]: Start isEmpty. Operand 67765 states and 99081 transitions. [2020-10-28 18:53:02,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:53:02,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:02,523 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] [2020-10-28 18:53:02,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:53:02,523 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:02,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:02,523 INFO L82 PathProgramCache]: Analyzing trace with hash -928924795, now seen corresponding path program 1 times [2020-10-28 18:53:02,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:02,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9886927] [2020-10-28 18:53:02,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:02,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:02,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:02,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:02,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:02,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:02,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:03,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:03,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:03,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:04,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:04,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:04,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:04,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:04,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:06,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:07,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:07,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:53:07,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:53:07,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:53:07,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:07,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:07,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:53:07,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:53:07,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 18:53:07,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:07,815 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:53:07,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:07,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:07,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:07,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:07,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:07,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:53:07,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:07,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:07,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:07,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:07,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:53:07,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:07,858 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 18:53:07,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9886927] [2020-10-28 18:53:07,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:07,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:53:07,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631194614] [2020-10-28 18:53:07,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:53:07,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:07,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:53:07,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:53:07,860 INFO L87 Difference]: Start difference. First operand 67765 states and 99081 transitions. Second operand 6 states. [2020-10-28 18:53:08,127 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:53:09,396 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:53:15,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:15,309 INFO L93 Difference]: Finished difference Result 105283 states and 154259 transitions. [2020-10-28 18:53:15,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:53:15,310 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-28 18:53:15,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:15,397 INFO L225 Difference]: With dead ends: 105283 [2020-10-28 18:53:15,397 INFO L226 Difference]: Without dead ends: 49856 [2020-10-28 18:53:15,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:53:15,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49856 states. [2020-10-28 18:53:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49856 to 49688. [2020-10-28 18:53:22,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49688 states. [2020-10-28 18:53:22,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49688 states to 49688 states and 72530 transitions. [2020-10-28 18:53:22,118 INFO L78 Accepts]: Start accepts. Automaton has 49688 states and 72530 transitions. Word has length 65 [2020-10-28 18:53:22,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:22,118 INFO L481 AbstractCegarLoop]: Abstraction has 49688 states and 72530 transitions. [2020-10-28 18:53:22,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:53:22,118 INFO L276 IsEmpty]: Start isEmpty. Operand 49688 states and 72530 transitions. [2020-10-28 18:53:22,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:53:22,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:22,129 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] [2020-10-28 18:53:22,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:53:22,129 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:22,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:22,130 INFO L82 PathProgramCache]: Analyzing trace with hash 961292226, now seen corresponding path program 1 times [2020-10-28 18:53:22,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:22,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956752921] [2020-10-28 18:53:22,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:22,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:22,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:22,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:22,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:22,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:22,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:22,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:22,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:23,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:23,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:24,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:25,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:25,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:25,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:25,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:25,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:25,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:25,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:26,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:26,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:26,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:26,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:27,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:27,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:27,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:53:27,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-28 18:53:27,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:53:27,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:27,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:27,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:53:27,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:53:27,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 18:53:27,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:27,385 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:53:27,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:27,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:27,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:27,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:27,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:27,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:53:27,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:27,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:27,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:27,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:27,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:53:27,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:27,419 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 18:53:27,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956752921] [2020-10-28 18:53:27,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:27,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:53:27,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047703708] [2020-10-28 18:53:27,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:53:27,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:27,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:53:27,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:53:27,421 INFO L87 Difference]: Start difference. First operand 49688 states and 72530 transitions. Second operand 6 states. [2020-10-28 18:53:27,659 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:53:28,605 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:53:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:33,331 INFO L93 Difference]: Finished difference Result 77519 states and 113433 transitions. [2020-10-28 18:53:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:53:33,332 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-28 18:53:33,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:33,383 INFO L225 Difference]: With dead ends: 77519 [2020-10-28 18:53:33,383 INFO L226 Difference]: Without dead ends: 36650 [2020-10-28 18:53:33,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:53:33,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36650 states. [2020-10-28 18:53:38,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36650 to 36530. [2020-10-28 18:53:38,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36530 states. [2020-10-28 18:53:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36530 states to 36530 states and 53274 transitions. [2020-10-28 18:53:38,198 INFO L78 Accepts]: Start accepts. Automaton has 36530 states and 53274 transitions. Word has length 65 [2020-10-28 18:53:38,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:38,199 INFO L481 AbstractCegarLoop]: Abstraction has 36530 states and 53274 transitions. [2020-10-28 18:53:38,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:53:38,199 INFO L276 IsEmpty]: Start isEmpty. Operand 36530 states and 53274 transitions. [2020-10-28 18:53:38,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 18:53:38,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:38,203 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] [2020-10-28 18:53:38,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:53:38,203 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:38,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:38,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2108483574, now seen corresponding path program 1 times [2020-10-28 18:53:38,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:38,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149088352] [2020-10-28 18:53:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:38,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:38,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:38,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:38,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:38,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:38,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:39,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:39,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:39,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:39,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:40,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:41,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:42,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:42,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:42,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:42,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:43,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:43,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 18:53:43,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:53:43,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:53:43,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:43,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:43,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 18:53:43,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:53:43,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:53:43,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:43,658 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:53:43,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:43,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:43,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:43,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:43,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:43,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:53:43,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:43,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:53:43,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:43,720 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 18:53:43,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149088352] [2020-10-28 18:53:43,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:43,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-28 18:53:43,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382576088] [2020-10-28 18:53:43,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 18:53:43,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:43,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 18:53:43,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:53:43,722 INFO L87 Difference]: Start difference. First operand 36530 states and 53274 transitions. Second operand 13 states. [2020-10-28 18:53:44,056 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 18:53:47,316 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:53:52,237 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:53:52,964 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:54:20,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:20,251 INFO L93 Difference]: Finished difference Result 220068 states and 310129 transitions. [2020-10-28 18:54:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-28 18:54:20,252 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-10-28 18:54:20,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:20,744 INFO L225 Difference]: With dead ends: 220068 [2020-10-28 18:54:20,744 INFO L226 Difference]: Without dead ends: 198655 [2020-10-28 18:54:20,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1219, Invalid=5261, Unknown=0, NotChecked=0, Total=6480 [2020-10-28 18:54:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198655 states.