/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 07:01:59,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 07:01:59,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 07:01:59,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 07:01:59,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 07:01:59,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 07:01:59,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 07:01:59,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 07:01:59,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 07:01:59,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 07:01:59,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 07:01:59,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 07:01:59,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 07:01:59,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 07:01:59,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 07:01:59,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 07:01:59,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 07:01:59,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 07:01:59,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 07:01:59,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 07:01:59,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 07:01:59,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 07:01:59,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 07:01:59,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 07:01:59,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 07:01:59,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 07:01:59,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 07:01:59,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 07:01:59,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 07:01:59,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-11-07 07:01:59,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 07:01:59,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 07:01:59,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 07:01:59,627 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 07:01:59,646 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 07:01:59,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 07:01:59,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 07:01:59,653 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 07:01:59,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 07:01:59,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 07:01:59,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 07:01:59,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 07:01:59,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 07:01:59,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 07:01:59,665 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 07:01:59,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 07:01:59,665 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 07:01:59,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 07:01:59,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 07:01:59,666 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 07:01:59,666 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 07:01:59,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 07:01:59,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 07:01:59,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 07:01:59,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 07:01:59,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 07:01:59,667 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 07:02:00,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 07:02:00,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 07:02:00,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 07:02:00,127 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 07:02:00,127 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 07:02:00,128 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-11-07 07:02:00,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd70d0313/6b064909bcef45c9a9b26bb8bb9ec639/FLAG3df342949 [2020-11-07 07:02:01,076 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 07:02:01,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-11-07 07:02:01,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd70d0313/6b064909bcef45c9a9b26bb8bb9ec639/FLAG3df342949 [2020-11-07 07:02:01,173 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd70d0313/6b064909bcef45c9a9b26bb8bb9ec639 [2020-11-07 07:02:01,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 07:02:01,186 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 07:02:01,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 07:02:01,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 07:02:01,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 07:02:01,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:02:01" (1/1) ... [2020-11-07 07:02:01,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a4ff3c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:02:01, skipping insertion in model container [2020-11-07 07:02:01,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:02:01" (1/1) ... [2020-11-07 07:02:01,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 07:02:01,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 07:02:02,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 07:02:02,858 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 07:02:03,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 07:02:03,661 INFO L208 MainTranslator]: Completed translation [2020-11-07 07:02:03,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:02:03 WrapperNode [2020-11-07 07:02:03,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 07:02:03,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 07:02:03,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 07:02:03,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 07:02:03,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:02:03" (1/1) ... [2020-11-07 07:02:03,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:02:03" (1/1) ... [2020-11-07 07:02:03,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:02:03" (1/1) ... [2020-11-07 07:02:03,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:02:03" (1/1) ... [2020-11-07 07:02:03,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:02:03" (1/1) ... [2020-11-07 07:02:03,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:02:03" (1/1) ... [2020-11-07 07:02:03,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:02:03" (1/1) ... [2020-11-07 07:02:03,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 07:02:03,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 07:02:03,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 07:02:03,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 07:02:03,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:02:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-11-07 07:02:03,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 07:02:03,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 07:02:03,988 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 07:02:03,988 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 07:02:03,988 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 07:02:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 07:02:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 07:02:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 07:02:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 07:02:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-07 07:02:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-11-07 07:02:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-07 07:02:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-07 07:02:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 07:02:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-07 07:02:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-07 07:02:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-07 07:02:03,991 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-07 07:02:03,991 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-07 07:02:03,991 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-07 07:02:03,991 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-07 07:02:03,991 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-07 07:02:03,992 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 07:02:03,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 07:02:03,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 07:02:03,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 07:02:03,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 07:02:03,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 07:02:03,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 07:02:08,773 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 07:02:08,774 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 07:02:08,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:02:08 BoogieIcfgContainer [2020-11-07 07:02:08,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 07:02:08,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 07:02:08,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 07:02:08,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 07:02:08,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:02:01" (1/3) ... [2020-11-07 07:02:08,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@490980b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:02:08, skipping insertion in model container [2020-11-07 07:02:08,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:02:03" (2/3) ... [2020-11-07 07:02:08,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@490980b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:02:08, skipping insertion in model container [2020-11-07 07:02:08,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:02:08" (3/3) ... [2020-11-07 07:02:08,790 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-11-07 07:02:08,807 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 07:02:08,812 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 07:02:08,825 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 07:02:08,850 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 07:02:08,850 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 07:02:08,850 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 07:02:08,851 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 07:02:08,851 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 07:02:08,851 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 07:02:08,851 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 07:02:08,851 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 07:02:08,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states. [2020-11-07 07:02:08,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 948 [2020-11-07 07:02:08,992 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 07:02:08,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 07:02:08,994 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 07:02:09,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 07:02:09,002 INFO L82 PathProgramCache]: Analyzing trace with hash 159530217, now seen corresponding path program 1 times [2020-11-07 07:02:09,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 07:02:09,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790955941] [2020-11-07 07:02:09,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 07:02:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:02:11,115 WARN L194 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-07 07:02:11,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 07:02:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:02:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 07:02:12,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790955941] [2020-11-07 07:02:12,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 07:02:12,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 07:02:12,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803746290] [2020-11-07 07:02:12,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 07:02:12,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 07:02:12,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 07:02:12,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 07:02:12,320 INFO L87 Difference]: Start difference. First operand 3048 states. Second operand 4 states. [2020-11-07 07:02:26,731 WARN L194 SmtUtils]: Spent 886.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-11-07 07:02:28,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 07:02:28,877 INFO L93 Difference]: Finished difference Result 4923 states and 6329 transitions. [2020-11-07 07:02:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 07:02:28,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 947 [2020-11-07 07:02:28,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 07:02:28,955 INFO L225 Difference]: With dead ends: 4923 [2020-11-07 07:02:28,955 INFO L226 Difference]: Without dead ends: 3663 [2020-11-07 07:02:28,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 07:02:29,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3663 states. [2020-11-07 07:02:29,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3663 to 3649. [2020-11-07 07:02:29,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3649 states. [2020-11-07 07:02:29,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 4442 transitions. [2020-11-07 07:02:29,253 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 4442 transitions. Word has length 947 [2020-11-07 07:02:29,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 07:02:29,257 INFO L481 AbstractCegarLoop]: Abstraction has 3649 states and 4442 transitions. [2020-11-07 07:02:29,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 07:02:29,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 4442 transitions. [2020-11-07 07:02:29,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 948 [2020-11-07 07:02:29,309 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 07:02:29,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 07:02:29,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 07:02:29,312 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 07:02:29,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 07:02:29,313 INFO L82 PathProgramCache]: Analyzing trace with hash -237877571, now seen corresponding path program 1 times [2020-11-07 07:02:29,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 07:02:29,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437338344] [2020-11-07 07:02:29,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 07:02:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:02:30,744 WARN L194 SmtUtils]: Spent 939.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-07 07:02:30,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 07:02:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:02:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 07:02:31,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437338344] [2020-11-07 07:02:31,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 07:02:31,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 07:02:31,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368234209] [2020-11-07 07:02:31,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 07:02:31,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 07:02:31,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 07:02:31,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 07:02:31,528 INFO L87 Difference]: Start difference. First operand 3649 states and 4442 transitions. Second operand 4 states. [2020-11-07 07:02:43,437 WARN L194 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-11-07 07:02:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 07:02:45,428 INFO L93 Difference]: Finished difference Result 6540 states and 8128 transitions. [2020-11-07 07:02:45,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 07:02:45,435 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 947 [2020-11-07 07:02:45,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 07:02:45,467 INFO L225 Difference]: With dead ends: 6540 [2020-11-07 07:02:45,467 INFO L226 Difference]: Without dead ends: 5660 [2020-11-07 07:02:45,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 07:02:45,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5660 states. [2020-11-07 07:02:45,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5660 to 5617. [2020-11-07 07:02:45,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5617 states. [2020-11-07 07:02:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5617 states to 5617 states and 6972 transitions. [2020-11-07 07:02:45,685 INFO L78 Accepts]: Start accepts. Automaton has 5617 states and 6972 transitions. Word has length 947 [2020-11-07 07:02:45,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 07:02:45,687 INFO L481 AbstractCegarLoop]: Abstraction has 5617 states and 6972 transitions. [2020-11-07 07:02:45,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 07:02:45,687 INFO L276 IsEmpty]: Start isEmpty. Operand 5617 states and 6972 transitions. [2020-11-07 07:02:45,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 948 [2020-11-07 07:02:45,709 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 07:02:45,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 07:02:45,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 07:02:45,712 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 07:02:45,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 07:02:45,718 INFO L82 PathProgramCache]: Analyzing trace with hash -237035568, now seen corresponding path program 1 times [2020-11-07 07:02:45,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 07:02:45,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404730921] [2020-11-07 07:02:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 07:02:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:02:47,619 WARN L194 SmtUtils]: Spent 990.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-07 07:02:47,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 07:02:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:02:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 07:02:48,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404730921] [2020-11-07 07:02:48,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 07:02:48,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 07:02:48,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247880592] [2020-11-07 07:02:48,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 07:02:48,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 07:02:48,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 07:02:48,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 07:02:48,383 INFO L87 Difference]: Start difference. First operand 5617 states and 6972 transitions. Second operand 5 states. [2020-11-07 07:03:07,978 WARN L194 SmtUtils]: Spent 910.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-11-07 07:03:11,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 07:03:11,961 INFO L93 Difference]: Finished difference Result 16046 states and 20043 transitions. [2020-11-07 07:03:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 07:03:11,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 947 [2020-11-07 07:03:11,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 07:03:12,006 INFO L225 Difference]: With dead ends: 16046 [2020-11-07 07:03:12,006 INFO L226 Difference]: Without dead ends: 10750 [2020-11-07 07:03:12,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 07:03:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10750 states. [2020-11-07 07:03:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10750 to 10067. [2020-11-07 07:03:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10067 states. [2020-11-07 07:03:12,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10067 states to 10067 states and 12619 transitions. [2020-11-07 07:03:12,685 INFO L78 Accepts]: Start accepts. Automaton has 10067 states and 12619 transitions. Word has length 947 [2020-11-07 07:03:12,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 07:03:12,686 INFO L481 AbstractCegarLoop]: Abstraction has 10067 states and 12619 transitions. [2020-11-07 07:03:12,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 07:03:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 10067 states and 12619 transitions. [2020-11-07 07:03:12,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 950 [2020-11-07 07:03:12,714 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 07:03:12,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 07:03:12,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 07:03:12,715 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 07:03:12,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 07:03:12,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1355841069, now seen corresponding path program 1 times [2020-11-07 07:03:12,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 07:03:12,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624415706] [2020-11-07 07:03:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 07:03:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:03:13,878 WARN L194 SmtUtils]: Spent 824.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-07 07:03:13,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 07:03:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:03:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 07:03:14,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624415706] [2020-11-07 07:03:14,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 07:03:14,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 07:03:14,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798577471] [2020-11-07 07:03:14,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 07:03:14,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 07:03:14,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 07:03:14,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 07:03:14,795 INFO L87 Difference]: Start difference. First operand 10067 states and 12619 transitions. Second operand 4 states. [2020-11-07 07:03:36,764 WARN L194 SmtUtils]: Spent 958.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-11-07 07:03:40,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 07:03:40,758 INFO L93 Difference]: Finished difference Result 29023 states and 36468 transitions. [2020-11-07 07:03:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 07:03:40,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 949 [2020-11-07 07:03:40,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 07:03:40,827 INFO L225 Difference]: With dead ends: 29023 [2020-11-07 07:03:40,828 INFO L226 Difference]: Without dead ends: 19483 [2020-11-07 07:03:40,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 07:03:40,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19483 states. [2020-11-07 07:03:42,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19483 to 18800. [2020-11-07 07:03:42,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18800 states. [2020-11-07 07:03:42,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18800 states to 18800 states and 23667 transitions. [2020-11-07 07:03:42,158 INFO L78 Accepts]: Start accepts. Automaton has 18800 states and 23667 transitions. Word has length 949 [2020-11-07 07:03:42,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 07:03:42,160 INFO L481 AbstractCegarLoop]: Abstraction has 18800 states and 23667 transitions. [2020-11-07 07:03:42,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 07:03:42,160 INFO L276 IsEmpty]: Start isEmpty. Operand 18800 states and 23667 transitions. [2020-11-07 07:03:42,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 950 [2020-11-07 07:03:42,204 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 07:03:42,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 07:03:42,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 07:03:42,205 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 07:03:42,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 07:03:42,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1770542518, now seen corresponding path program 1 times [2020-11-07 07:03:42,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 07:03:42,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155047840] [2020-11-07 07:03:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 07:03:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:03:43,396 WARN L194 SmtUtils]: Spent 860.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-07 07:03:43,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 07:03:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:03:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 07:03:44,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155047840] [2020-11-07 07:03:44,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 07:03:44,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 07:03:44,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459365081] [2020-11-07 07:03:44,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 07:03:44,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 07:03:44,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 07:03:44,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 07:03:44,141 INFO L87 Difference]: Start difference. First operand 18800 states and 23667 transitions. Second operand 4 states. [2020-11-07 07:04:10,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 07:04:10,872 INFO L93 Difference]: Finished difference Result 55666 states and 70219 transitions. [2020-11-07 07:04:10,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 07:04:10,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 949 [2020-11-07 07:04:10,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 07:04:10,972 INFO L225 Difference]: With dead ends: 55666 [2020-11-07 07:04:10,972 INFO L226 Difference]: Without dead ends: 37234 [2020-11-07 07:04:11,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 07:04:11,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37234 states. [2020-11-07 07:04:12,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37234 to 18822. [2020-11-07 07:04:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18822 states. [2020-11-07 07:04:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18822 states to 18822 states and 23698 transitions. [2020-11-07 07:04:12,556 INFO L78 Accepts]: Start accepts. Automaton has 18822 states and 23698 transitions. Word has length 949 [2020-11-07 07:04:12,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 07:04:12,557 INFO L481 AbstractCegarLoop]: Abstraction has 18822 states and 23698 transitions. [2020-11-07 07:04:12,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 07:04:12,557 INFO L276 IsEmpty]: Start isEmpty. Operand 18822 states and 23698 transitions. [2020-11-07 07:04:12,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2020-11-07 07:04:12,688 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 07:04:12,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 07:04:12,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 07:04:12,689 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 07:04:12,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 07:04:12,690 INFO L82 PathProgramCache]: Analyzing trace with hash 962997405, now seen corresponding path program 1 times [2020-11-07 07:04:12,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 07:04:12,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490433318] [2020-11-07 07:04:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 07:04:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:04:13,830 WARN L194 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-07 07:04:13,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 07:04:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:04:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 07:04:14,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490433318] [2020-11-07 07:04:14,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 07:04:14,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 07:04:14,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536264680] [2020-11-07 07:04:14,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 07:04:14,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 07:04:14,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 07:04:14,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 07:04:14,467 INFO L87 Difference]: Start difference. First operand 18822 states and 23698 transitions. Second operand 4 states. [2020-11-07 07:04:42,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 07:04:42,283 INFO L93 Difference]: Finished difference Result 55680 states and 70235 transitions. [2020-11-07 07:04:42,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 07:04:42,284 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 950 [2020-11-07 07:04:42,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 07:04:42,361 INFO L225 Difference]: With dead ends: 55680 [2020-11-07 07:04:42,361 INFO L226 Difference]: Without dead ends: 37249 [2020-11-07 07:04:42,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 07:04:42,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37249 states. [2020-11-07 07:04:44,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37249 to 18842. [2020-11-07 07:04:44,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18842 states. [2020-11-07 07:04:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18842 states to 18842 states and 23721 transitions. [2020-11-07 07:04:44,028 INFO L78 Accepts]: Start accepts. Automaton has 18842 states and 23721 transitions. Word has length 950 [2020-11-07 07:04:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 07:04:44,029 INFO L481 AbstractCegarLoop]: Abstraction has 18842 states and 23721 transitions. [2020-11-07 07:04:44,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 07:04:44,029 INFO L276 IsEmpty]: Start isEmpty. Operand 18842 states and 23721 transitions. [2020-11-07 07:04:44,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 952 [2020-11-07 07:04:44,065 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 07:04:44,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 07:04:44,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 07:04:44,066 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 07:04:44,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 07:04:44,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1993119785, now seen corresponding path program 1 times [2020-11-07 07:04:44,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 07:04:44,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99611264] [2020-11-07 07:04:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 07:04:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:04:45,638 WARN L194 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-07 07:04:45,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 07:04:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:04:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 07:04:46,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99611264] [2020-11-07 07:04:46,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 07:04:46,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 07:04:46,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849153825] [2020-11-07 07:04:46,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 07:04:46,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 07:04:46,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 07:04:46,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 07:04:46,697 INFO L87 Difference]: Start difference. First operand 18842 states and 23721 transitions. Second operand 5 states. [2020-11-07 07:05:09,845 WARN L194 SmtUtils]: Spent 998.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-11-07 07:05:14,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 07:05:14,846 INFO L93 Difference]: Finished difference Result 54823 states and 69078 transitions. [2020-11-07 07:05:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 07:05:14,847 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 951 [2020-11-07 07:05:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 07:05:14,915 INFO L225 Difference]: With dead ends: 54823 [2020-11-07 07:05:14,916 INFO L226 Difference]: Without dead ends: 36347 [2020-11-07 07:05:14,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 07:05:14,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36347 states. [2020-11-07 07:05:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36347 to 35690. [2020-11-07 07:05:17,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35690 states. [2020-11-07 07:05:17,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35690 states to 35690 states and 44890 transitions. [2020-11-07 07:05:17,955 INFO L78 Accepts]: Start accepts. Automaton has 35690 states and 44890 transitions. Word has length 951 [2020-11-07 07:05:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 07:05:17,955 INFO L481 AbstractCegarLoop]: Abstraction has 35690 states and 44890 transitions. [2020-11-07 07:05:17,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 07:05:17,955 INFO L276 IsEmpty]: Start isEmpty. Operand 35690 states and 44890 transitions. [2020-11-07 07:05:17,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 954 [2020-11-07 07:05:17,990 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 07:05:17,991 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 07:05:17,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 07:05:17,991 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 07:05:17,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 07:05:17,992 INFO L82 PathProgramCache]: Analyzing trace with hash 612278346, now seen corresponding path program 1 times [2020-11-07 07:05:17,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 07:05:17,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184834460] [2020-11-07 07:05:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 07:05:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:05:19,419 WARN L194 SmtUtils]: Spent 911.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-07 07:05:19,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 07:05:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:05:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 07:05:20,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184834460] [2020-11-07 07:05:20,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 07:05:20,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 07:05:20,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622030913] [2020-11-07 07:05:20,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 07:05:20,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 07:05:20,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 07:05:20,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 07:05:20,292 INFO L87 Difference]: Start difference. First operand 35690 states and 44890 transitions. Second operand 5 states. [2020-11-07 07:05:48,017 WARN L194 SmtUtils]: Spent 989.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-11-07 07:05:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 07:05:53,871 INFO L93 Difference]: Finished difference Result 104836 states and 131852 transitions. [2020-11-07 07:05:53,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 07:05:53,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 953 [2020-11-07 07:05:53,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 07:05:53,993 INFO L225 Difference]: With dead ends: 104836 [2020-11-07 07:05:53,993 INFO L226 Difference]: Without dead ends: 69653 [2020-11-07 07:05:54,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 07:05:54,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69653 states. [2020-11-07 07:06:00,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69653 to 68954. [2020-11-07 07:06:00,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68954 states. [2020-11-07 07:06:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68954 states to 68954 states and 86532 transitions. [2020-11-07 07:06:00,454 INFO L78 Accepts]: Start accepts. Automaton has 68954 states and 86532 transitions. Word has length 953 [2020-11-07 07:06:00,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 07:06:00,455 INFO L481 AbstractCegarLoop]: Abstraction has 68954 states and 86532 transitions. [2020-11-07 07:06:00,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 07:06:00,455 INFO L276 IsEmpty]: Start isEmpty. Operand 68954 states and 86532 transitions. [2020-11-07 07:06:00,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2020-11-07 07:06:00,530 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 07:06:00,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 07:06:00,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 07:06:00,531 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 07:06:00,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 07:06:00,532 INFO L82 PathProgramCache]: Analyzing trace with hash -451811632, now seen corresponding path program 1 times [2020-11-07 07:06:00,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 07:06:00,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330426538] [2020-11-07 07:06:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 07:06:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:06:01,716 WARN L194 SmtUtils]: Spent 898.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-07 07:06:01,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 07:06:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:06:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 07:06:02,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330426538] [2020-11-07 07:06:02,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 07:06:02,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 07:06:02,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480961401] [2020-11-07 07:06:02,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 07:06:02,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 07:06:02,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 07:06:02,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 07:06:02,681 INFO L87 Difference]: Start difference. First operand 68954 states and 86532 transitions. Second operand 4 states. [2020-11-07 07:06:43,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 07:06:43,662 INFO L93 Difference]: Finished difference Result 205694 states and 258235 transitions. [2020-11-07 07:06:43,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 07:06:43,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 955 [2020-11-07 07:06:43,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 07:06:43,888 INFO L225 Difference]: With dead ends: 205694 [2020-11-07 07:06:43,888 INFO L226 Difference]: Without dead ends: 137329 [2020-11-07 07:06:43,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 07:06:44,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137329 states. [2020-11-07 07:06:51,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137329 to 69050. [2020-11-07 07:06:51,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69050 states. [2020-11-07 07:06:51,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69050 states to 69050 states and 86664 transitions. [2020-11-07 07:06:51,852 INFO L78 Accepts]: Start accepts. Automaton has 69050 states and 86664 transitions. Word has length 955 [2020-11-07 07:06:51,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 07:06:51,853 INFO L481 AbstractCegarLoop]: Abstraction has 69050 states and 86664 transitions. [2020-11-07 07:06:51,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 07:06:51,853 INFO L276 IsEmpty]: Start isEmpty. Operand 69050 states and 86664 transitions. [2020-11-07 07:06:51,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2020-11-07 07:06:51,931 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 07:06:51,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 07:06:51,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 07:06:51,932 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 07:06:51,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 07:06:51,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1743044903, now seen corresponding path program 1 times [2020-11-07 07:06:51,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 07:06:51,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008848158] [2020-11-07 07:06:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 07:06:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:06:53,077 WARN L194 SmtUtils]: Spent 862.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-07 07:06:53,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 07:06:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:06:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 07:06:54,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008848158] [2020-11-07 07:06:54,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 07:06:54,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 07:06:54,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141361425] [2020-11-07 07:06:54,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 07:06:54,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 07:06:54,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 07:06:54,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 07:06:54,081 INFO L87 Difference]: Start difference. First operand 69050 states and 86664 transitions. Second operand 4 states. [2020-11-07 07:07:29,772 WARN L194 SmtUtils]: Spent 959.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-11-07 07:07:38,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 07:07:38,065 INFO L93 Difference]: Finished difference Result 202876 states and 254374 transitions. [2020-11-07 07:07:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 07:07:38,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 955 [2020-11-07 07:07:38,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 07:07:38,257 INFO L225 Difference]: With dead ends: 202876 [2020-11-07 07:07:38,257 INFO L226 Difference]: Without dead ends: 135111 [2020-11-07 07:07:38,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 07:07:38,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135111 states. [2020-11-07 07:07:53,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135111 to 134412. [2020-11-07 07:07:53,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134412 states. [2020-11-07 07:07:54,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134412 states to 134412 states and 168166 transitions. [2020-11-07 07:07:54,162 INFO L78 Accepts]: Start accepts. Automaton has 134412 states and 168166 transitions. Word has length 955 [2020-11-07 07:07:54,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 07:07:54,162 INFO L481 AbstractCegarLoop]: Abstraction has 134412 states and 168166 transitions. [2020-11-07 07:07:54,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 07:07:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 134412 states and 168166 transitions. [2020-11-07 07:07:54,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2020-11-07 07:07:54,604 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 07:07:54,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 07:07:54,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 07:07:54,619 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 07:07:54,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 07:07:54,620 INFO L82 PathProgramCache]: Analyzing trace with hash -172095479, now seen corresponding path program 1 times [2020-11-07 07:07:54,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 07:07:54,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016189463] [2020-11-07 07:07:54,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 07:07:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:07:56,011 WARN L194 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 352 [2020-11-07 07:07:56,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 07:07:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:07:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 07:07:56,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016189463] [2020-11-07 07:07:56,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 07:07:56,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 07:07:56,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845210606] [2020-11-07 07:07:56,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 07:07:56,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 07:07:56,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 07:07:56,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 07:07:56,750 INFO L87 Difference]: Start difference. First operand 134412 states and 168166 transitions. Second operand 4 states. [2020-11-07 07:08:56,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 07:08:56,845 INFO L93 Difference]: Finished difference Result 401370 states and 502139 transitions. [2020-11-07 07:08:56,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 07:08:56,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 956 [2020-11-07 07:08:56,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 07:08:57,443 INFO L225 Difference]: With dead ends: 401370 [2020-11-07 07:08:57,443 INFO L226 Difference]: Without dead ends: 267911 [2020-11-07 07:08:57,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 07:08:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267911 states. [2020-11-07 07:09:14,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267911 to 134518. [2020-11-07 07:09:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134518 states. [2020-11-07 07:09:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134518 states to 134518 states and 168286 transitions. [2020-11-07 07:09:15,101 INFO L78 Accepts]: Start accepts. Automaton has 134518 states and 168286 transitions. Word has length 956 [2020-11-07 07:09:15,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 07:09:15,102 INFO L481 AbstractCegarLoop]: Abstraction has 134518 states and 168286 transitions. [2020-11-07 07:09:15,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 07:09:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 134518 states and 168286 transitions. [2020-11-07 07:09:15,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2020-11-07 07:09:15,222 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 07:09:15,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 07:09:15,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 07:09:15,224 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 07:09:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 07:09:15,224 INFO L82 PathProgramCache]: Analyzing trace with hash 495940771, now seen corresponding path program 1 times [2020-11-07 07:09:15,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 07:09:15,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110428707] [2020-11-07 07:09:15,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 07:09:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:09:16,417 WARN L194 SmtUtils]: Spent 893.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-07 07:09:16,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 07:09:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:09:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 07:09:17,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110428707] [2020-11-07 07:09:17,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 07:09:17,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 07:09:17,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42904339] [2020-11-07 07:09:17,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 07:09:17,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 07:09:17,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 07:09:17,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 07:09:17,563 INFO L87 Difference]: Start difference. First operand 134518 states and 168286 transitions. Second operand 4 states. [2020-11-07 07:10:07,726 WARN L194 SmtUtils]: Spent 987.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-11-07 07:10:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 07:10:20,818 INFO L93 Difference]: Finished difference Result 381020 states and 476224 transitions. [2020-11-07 07:10:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 07:10:20,819 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 957 [2020-11-07 07:10:20,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 07:10:21,303 INFO L225 Difference]: With dead ends: 381020 [2020-11-07 07:10:21,303 INFO L226 Difference]: Without dead ends: 248225 [2020-11-07 07:10:21,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 07:10:21,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248225 states. [2020-11-07 07:10:53,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248225 to 247526. [2020-11-07 07:10:53,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247526 states. [2020-11-07 07:10:54,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247526 states to 247526 states and 308520 transitions. [2020-11-07 07:10:54,397 INFO L78 Accepts]: Start accepts. Automaton has 247526 states and 308520 transitions. Word has length 957 [2020-11-07 07:10:54,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 07:10:54,398 INFO L481 AbstractCegarLoop]: Abstraction has 247526 states and 308520 transitions. [2020-11-07 07:10:54,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 07:10:54,398 INFO L276 IsEmpty]: Start isEmpty. Operand 247526 states and 308520 transitions. [2020-11-07 07:10:55,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2020-11-07 07:10:55,009 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 07:10:55,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 07:10:55,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 07:10:55,010 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 07:10:55,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 07:10:55,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1000137763, now seen corresponding path program 1 times [2020-11-07 07:10:55,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 07:10:55,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785798952] [2020-11-07 07:10:55,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 07:10:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:10:56,871 WARN L194 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 352 [2020-11-07 07:10:56,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 07:10:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 07:10:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 07:10:58,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785798952] [2020-11-07 07:10:58,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 07:10:58,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 07:10:58,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309114371] [2020-11-07 07:10:58,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 07:10:58,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 07:10:58,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 07:10:58,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 07:10:58,121 INFO L87 Difference]: Start difference. First operand 247526 states and 308520 transitions. Second operand 5 states. [2020-11-07 07:12:12,793 WARN L194 SmtUtils]: Spent 988.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-11-07 07:12:35,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 07:12:35,148 INFO L93 Difference]: Finished difference Result 728806 states and 907453 transitions. [2020-11-07 07:12:35,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 07:12:35,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 957 [2020-11-07 07:12:35,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 07:12:36,233 INFO L225 Difference]: With dead ends: 728806 [2020-11-07 07:12:36,233 INFO L226 Difference]: Without dead ends: 482149 [2020-11-07 07:12:36,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 07:12:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482149 states.