/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 18:19:29,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:19:29,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:19:29,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 18:19:29,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 18:19:29,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 18:19:29,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 18:19:29,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 18:19:29,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 18:19:29,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 18:19:29,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 18:19:29,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 18:19:29,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 18:19:29,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 18:19:29,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 18:19:29,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 18:19:29,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 18:19:29,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 18:19:29,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 18:19:29,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 18:19:29,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 18:19:29,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 18:19:29,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 18:19:29,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 18:19:29,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-19 18:19:29,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-19 18:19:29,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-19 18:19:29,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-19 18:19:29,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-19 18:19:29,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-19 18:19:29,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-19 18:19:29,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-19 18:19:29,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-19 18:19:29,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-19 18:19:29,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-19 18:19:29,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-19 18:19:29,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-19 18:19:29,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-19 18:19:29,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 18:19:29,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 18:19:29,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 18:19:29,954 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-19 18:19:30,012 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:19:30,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:19:30,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:19:30,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:19:30,017 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:19:30,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:19:30,017 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:19:30,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:19:30,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:19:30,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:19:30,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:19:30,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:19:30,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:19:30,020 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:19:30,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:19:30,021 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:19:30,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:19:30,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:19:30,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:19:30,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:19:30,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:19:30,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:19:30,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:19:30,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:19:30,023 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:19:30,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:19:30,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:19:30,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 18:19:30,024 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:19:30,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:19:30,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:19:30,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:19:30,538 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 18:19:30,539 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 18:19:30,540 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-19 18:19:30,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4f929d70/6933941965a34766bcf5b9dbdb136c30/FLAG3a4313da7 [2021-02-19 18:19:31,581 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 18:19:31,582 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-19 18:19:31,603 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4f929d70/6933941965a34766bcf5b9dbdb136c30/FLAG3a4313da7 [2021-02-19 18:19:31,713 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4f929d70/6933941965a34766bcf5b9dbdb136c30 [2021-02-19 18:19:31,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:19:31,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:19:31,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 18:19:31,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 18:19:31,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 18:19:31,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 06:19:31" (1/1) ... [2021-02-19 18:19:31,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d21f036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:19:31, skipping insertion in model container [2021-02-19 18:19:31,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 06:19:31" (1/1) ... [2021-02-19 18:19:31,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 18:19:31,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 18:19:32,573 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[34132,34145] [2021-02-19 18:19:32,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 18:19:32,814 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 18:19:33,159 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[34132,34145] [2021-02-19 18:19:33,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 18:19:33,348 INFO L208 MainTranslator]: Completed translation [2021-02-19 18:19:33,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:19:33 WrapperNode [2021-02-19 18:19:33,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 18:19:33,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:19:33,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:19:33,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:19:33,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:19:33" (1/1) ... [2021-02-19 18:19:33,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:19:33" (1/1) ... [2021-02-19 18:19:33,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:19:33" (1/1) ... [2021-02-19 18:19:33,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:19:33" (1/1) ... [2021-02-19 18:19:33,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:19:33" (1/1) ... [2021-02-19 18:19:33,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:19:33" (1/1) ... [2021-02-19 18:19:33,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:19:33" (1/1) ... [2021-02-19 18:19:33,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:19:33,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:19:33,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:19:33,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:19:33,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:19:33" (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 [2021-02-19 18:19:33,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 18:19:33,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:19:33,645 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 18:19:33,645 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-19 18:19:33,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 18:19:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 18:19:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 18:19:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 18:19:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 18:19:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-19 18:19:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2021-02-19 18:19:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-19 18:19:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-19 18:19:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-19 18:19:33,647 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-19 18:19:33,647 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-19 18:19:33,647 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-19 18:19:33,647 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-19 18:19:33,647 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-19 18:19:33,647 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-19 18:19:33,648 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-19 18:19:33,648 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-19 18:19:33,648 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 18:19:33,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 18:19:33,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 18:19:33,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:19:33,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 18:19:33,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 18:19:33,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 18:19:36,974 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:19:36,974 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:19:36,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:19:36 BoogieIcfgContainer [2021-02-19 18:19:36,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:19:36,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:19:36,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:19:36,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:19:36,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 06:19:31" (1/3) ... [2021-02-19 18:19:36,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a74fa7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:19:36, skipping insertion in model container [2021-02-19 18:19:36,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:19:33" (2/3) ... [2021-02-19 18:19:36,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a74fa7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:19:36, skipping insertion in model container [2021-02-19 18:19:36,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:19:36" (3/3) ... [2021-02-19 18:19:36,987 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-19 18:19:36,994 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:19:37,000 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:19:37,039 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 18:19:37,074 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:19:37,075 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:19:37,075 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:19:37,075 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:19:37,075 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:19:37,075 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:19:37,075 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:19:37,076 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:19:37,111 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2021-02-19 18:19:37,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-02-19 18:19:37,141 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:19:37,143 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] [2021-02-19 18:19:37,143 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:19:37,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:19:37,150 INFO L82 PathProgramCache]: Analyzing trace with hash -796953542, now seen corresponding path program 1 times [2021-02-19 18:19:37,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:19:37,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125009233] [2021-02-19 18:19:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:19:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:19:38,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:38,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:38,217 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:38,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:19:38,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:38,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:39,106 WARN L202 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-19 18:19:39,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:19:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:19:39,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:39,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:19:39,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125009233] [2021-02-19 18:19:39,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:19:39,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:19:39,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15899152] [2021-02-19 18:19:39,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:19:39,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:19:39,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:19:39,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:19:39,392 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2021-02-19 18:19:40,324 WARN L202 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2021-02-19 18:19:45,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:19:45,752 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2021-02-19 18:19:45,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:19:45,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2021-02-19 18:19:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:19:45,789 INFO L225 Difference]: With dead ends: 1489 [2021-02-19 18:19:45,789 INFO L226 Difference]: Without dead ends: 1273 [2021-02-19 18:19:45,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:19:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-02-19 18:19:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2021-02-19 18:19:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2021-02-19 18:19:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2021-02-19 18:19:45,980 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2021-02-19 18:19:45,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:19:45,987 INFO L480 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2021-02-19 18:19:45,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:19:45,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2021-02-19 18:19:46,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-02-19 18:19:46,006 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:19:46,007 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] [2021-02-19 18:19:46,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:19:46,008 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:19:46,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:19:46,010 INFO L82 PathProgramCache]: Analyzing trace with hash -7793704, now seen corresponding path program 1 times [2021-02-19 18:19:46,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:19:46,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133777490] [2021-02-19 18:19:46,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:19:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:19:46,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:46,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:46,493 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:46,493 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:19:46,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:46,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:47,300 WARN L202 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-19 18:19:47,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:19:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:19:47,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:47,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:19:47,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133777490] [2021-02-19 18:19:47,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:19:47,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:19:47,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532626477] [2021-02-19 18:19:47,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:19:47,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:19:47,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:19:47,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:19:47,559 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 4 states. [2021-02-19 18:19:48,332 WARN L202 SmtUtils]: Spent 723.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2021-02-19 18:19:52,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:19:52,650 INFO L93 Difference]: Finished difference Result 2519 states and 3949 transitions. [2021-02-19 18:19:52,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:19:52,651 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2021-02-19 18:19:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:19:52,665 INFO L225 Difference]: With dead ends: 2519 [2021-02-19 18:19:52,666 INFO L226 Difference]: Without dead ends: 2185 [2021-02-19 18:19:52,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:19:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-02-19 18:19:52,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 2183. [2021-02-19 18:19:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2183 states. [2021-02-19 18:19:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 3388 transitions. [2021-02-19 18:19:52,791 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 3388 transitions. Word has length 326 [2021-02-19 18:19:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:19:52,792 INFO L480 AbstractCegarLoop]: Abstraction has 2183 states and 3388 transitions. [2021-02-19 18:19:52,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:19:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 3388 transitions. [2021-02-19 18:19:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-02-19 18:19:52,801 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:19:52,801 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] [2021-02-19 18:19:52,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:19:52,802 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:19:52,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:19:52,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1152623527, now seen corresponding path program 1 times [2021-02-19 18:19:52,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:19:52,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120783477] [2021-02-19 18:19:52,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:19:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:19:53,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:53,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:53,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:53,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:19:53,493 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:53,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-19 18:19:53,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:53,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:54,191 WARN L202 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-19 18:19:54,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:19:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:19:54,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:54,219 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:19:54,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120783477] [2021-02-19 18:19:54,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:19:54,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:19:54,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467161021] [2021-02-19 18:19:54,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:19:54,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:19:54,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:19:54,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:19:54,470 INFO L87 Difference]: Start difference. First operand 2183 states and 3388 transitions. Second operand 5 states. [2021-02-19 18:20:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:01,774 INFO L93 Difference]: Finished difference Result 6462 states and 10021 transitions. [2021-02-19 18:20:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:20:01,775 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2021-02-19 18:20:01,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:01,799 INFO L225 Difference]: With dead ends: 6462 [2021-02-19 18:20:01,800 INFO L226 Difference]: Without dead ends: 4294 [2021-02-19 18:20:01,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:20:01,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2021-02-19 18:20:02,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4292. [2021-02-19 18:20:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2021-02-19 18:20:02,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 6626 transitions. [2021-02-19 18:20:02,020 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 6626 transitions. Word has length 326 [2021-02-19 18:20:02,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:02,021 INFO L480 AbstractCegarLoop]: Abstraction has 4292 states and 6626 transitions. [2021-02-19 18:20:02,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-19 18:20:02,021 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 6626 transitions. [2021-02-19 18:20:02,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-02-19 18:20:02,034 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:20:02,034 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] [2021-02-19 18:20:02,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 18:20:02,035 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:20:02,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:02,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1729084787, now seen corresponding path program 1 times [2021-02-19 18:20:02,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:02,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182210833] [2021-02-19 18:20:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:02,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:02,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:02,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:02,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 18:20:02,180 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:02,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:02,840 WARN L202 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-19 18:20:02,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:20:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:02,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:02,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:02,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182210833] [2021-02-19 18:20:02,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:20:02,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:20:02,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145608713] [2021-02-19 18:20:02,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:20:03,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:03,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:20:03,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:20:03,003 INFO L87 Difference]: Start difference. First operand 4292 states and 6626 transitions. Second operand 4 states. [2021-02-19 18:20:11,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:11,552 INFO L93 Difference]: Finished difference Result 12831 states and 19807 transitions. [2021-02-19 18:20:11,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:20:11,553 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2021-02-19 18:20:11,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:11,592 INFO L225 Difference]: With dead ends: 12831 [2021-02-19 18:20:11,592 INFO L226 Difference]: Without dead ends: 8564 [2021-02-19 18:20:11,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:20:11,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8564 states. [2021-02-19 18:20:11,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8564 to 4305. [2021-02-19 18:20:11,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4305 states. [2021-02-19 18:20:11,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4305 states to 4305 states and 6645 transitions. [2021-02-19 18:20:11,838 INFO L78 Accepts]: Start accepts. Automaton has 4305 states and 6645 transitions. Word has length 328 [2021-02-19 18:20:11,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:11,838 INFO L480 AbstractCegarLoop]: Abstraction has 4305 states and 6645 transitions. [2021-02-19 18:20:11,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:20:11,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4305 states and 6645 transitions. [2021-02-19 18:20:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-02-19 18:20:11,850 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:20:11,850 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] [2021-02-19 18:20:11,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 18:20:11,851 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:20:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:11,852 INFO L82 PathProgramCache]: Analyzing trace with hash 4113480, now seen corresponding path program 1 times [2021-02-19 18:20:11,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:11,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041956311] [2021-02-19 18:20:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:12,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:12,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:12,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:12,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:20:12,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:12,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:12,858 WARN L202 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-19 18:20:12,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:20:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:12,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:12,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:13,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041956311] [2021-02-19 18:20:13,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:20:13,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:20:13,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052181170] [2021-02-19 18:20:13,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:20:13,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:13,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:20:13,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:20:13,024 INFO L87 Difference]: Start difference. First operand 4305 states and 6645 transitions. Second operand 4 states. [2021-02-19 18:20:21,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:21,169 INFO L93 Difference]: Finished difference Result 12594 states and 19394 transitions. [2021-02-19 18:20:21,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:20:21,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2021-02-19 18:20:21,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:21,207 INFO L225 Difference]: With dead ends: 12594 [2021-02-19 18:20:21,207 INFO L226 Difference]: Without dead ends: 8431 [2021-02-19 18:20:21,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:20:21,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8431 states. [2021-02-19 18:20:21,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8431 to 8429. [2021-02-19 18:20:21,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8429 states. [2021-02-19 18:20:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8429 states to 8429 states and 12935 transitions. [2021-02-19 18:20:21,676 INFO L78 Accepts]: Start accepts. Automaton has 8429 states and 12935 transitions. Word has length 328 [2021-02-19 18:20:21,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:21,677 INFO L480 AbstractCegarLoop]: Abstraction has 8429 states and 12935 transitions. [2021-02-19 18:20:21,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:20:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 8429 states and 12935 transitions. [2021-02-19 18:20:21,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-02-19 18:20:21,694 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:20:21,694 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] [2021-02-19 18:20:21,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 18:20:21,695 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:20:21,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:21,695 INFO L82 PathProgramCache]: Analyzing trace with hash -649310729, now seen corresponding path program 1 times [2021-02-19 18:20:21,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:21,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099928000] [2021-02-19 18:20:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:21,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:21,808 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:21,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:21,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 18:20:21,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:21,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:22,433 WARN L202 SmtUtils]: Spent 604.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-19 18:20:22,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:20:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:22,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:22,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:22,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099928000] [2021-02-19 18:20:22,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:20:22,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:20:22,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456833501] [2021-02-19 18:20:22,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:20:22,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:22,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:20:22,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:20:22,555 INFO L87 Difference]: Start difference. First operand 8429 states and 12935 transitions. Second operand 4 states. [2021-02-19 18:20:31,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:31,505 INFO L93 Difference]: Finished difference Result 25174 states and 38618 transitions. [2021-02-19 18:20:31,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:20:31,506 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2021-02-19 18:20:31,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:31,556 INFO L225 Difference]: With dead ends: 25174 [2021-02-19 18:20:31,556 INFO L226 Difference]: Without dead ends: 16805 [2021-02-19 18:20:31,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:20:31,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16805 states. [2021-02-19 18:20:32,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16805 to 8447. [2021-02-19 18:20:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8447 states. [2021-02-19 18:20:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8447 states to 8447 states and 12956 transitions. [2021-02-19 18:20:32,069 INFO L78 Accepts]: Start accepts. Automaton has 8447 states and 12956 transitions. Word has length 329 [2021-02-19 18:20:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:32,070 INFO L480 AbstractCegarLoop]: Abstraction has 8447 states and 12956 transitions. [2021-02-19 18:20:32,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:20:32,070 INFO L276 IsEmpty]: Start isEmpty. Operand 8447 states and 12956 transitions. [2021-02-19 18:20:32,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-02-19 18:20:32,085 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:20:32,086 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] [2021-02-19 18:20:32,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 18:20:32,086 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:20:32,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:32,087 INFO L82 PathProgramCache]: Analyzing trace with hash -448342333, now seen corresponding path program 1 times [2021-02-19 18:20:32,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:32,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999148554] [2021-02-19 18:20:32,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:32,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:32,255 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:32,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:32,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:20:32,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:32,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:32,986 WARN L202 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-19 18:20:32,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:20:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:33,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:33,010 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:33,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999148554] [2021-02-19 18:20:33,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:20:33,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:20:33,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802621139] [2021-02-19 18:20:33,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:20:33,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:33,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:20:33,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:20:33,136 INFO L87 Difference]: Start difference. First operand 8447 states and 12956 transitions. Second operand 4 states. [2021-02-19 18:20:41,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:41,855 INFO L93 Difference]: Finished difference Result 24662 states and 37725 transitions. [2021-02-19 18:20:41,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:20:41,857 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2021-02-19 18:20:41,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:41,891 INFO L225 Difference]: With dead ends: 24662 [2021-02-19 18:20:41,891 INFO L226 Difference]: Without dead ends: 16460 [2021-02-19 18:20:41,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:20:41,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16460 states. [2021-02-19 18:20:42,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16460 to 16458. [2021-02-19 18:20:42,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16458 states. [2021-02-19 18:20:42,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16458 states to 16458 states and 25068 transitions. [2021-02-19 18:20:42,875 INFO L78 Accepts]: Start accepts. Automaton has 16458 states and 25068 transitions. Word has length 330 [2021-02-19 18:20:42,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:42,879 INFO L480 AbstractCegarLoop]: Abstraction has 16458 states and 25068 transitions. [2021-02-19 18:20:42,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:20:42,880 INFO L276 IsEmpty]: Start isEmpty. Operand 16458 states and 25068 transitions. [2021-02-19 18:20:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-02-19 18:20:42,912 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:20:42,912 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] [2021-02-19 18:20:42,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 18:20:42,912 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:20:42,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:42,913 INFO L82 PathProgramCache]: Analyzing trace with hash -29605280, now seen corresponding path program 1 times [2021-02-19 18:20:42,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:42,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701761731] [2021-02-19 18:20:42,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:43,314 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:43,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:43,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:43,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:20:43,330 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-19 18:20:43,333 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-19 18:20:43,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:43,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-19 18:20:43,369 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:43,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:44,032 WARN L202 SmtUtils]: Spent 635.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-19 18:20:44,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:20:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:44,054 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:44,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:44,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701761731] [2021-02-19 18:20:44,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:20:44,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:20:44,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113686276] [2021-02-19 18:20:44,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:20:44,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:44,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:20:44,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:20:44,331 INFO L87 Difference]: Start difference. First operand 16458 states and 25068 transitions. Second operand 6 states. [2021-02-19 18:20:52,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:52,575 INFO L93 Difference]: Finished difference Result 48572 states and 73861 transitions. [2021-02-19 18:20:52,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:20:52,576 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 330 [2021-02-19 18:20:52,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:52,630 INFO L225 Difference]: With dead ends: 48572 [2021-02-19 18:20:52,631 INFO L226 Difference]: Without dead ends: 32173 [2021-02-19 18:20:52,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:20:52,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32173 states. [2021-02-19 18:20:54,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32173 to 32171. [2021-02-19 18:20:54,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32171 states. [2021-02-19 18:20:54,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32171 states to 32171 states and 48661 transitions. [2021-02-19 18:20:54,887 INFO L78 Accepts]: Start accepts. Automaton has 32171 states and 48661 transitions. Word has length 330 [2021-02-19 18:20:54,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:54,887 INFO L480 AbstractCegarLoop]: Abstraction has 32171 states and 48661 transitions. [2021-02-19 18:20:54,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 18:20:54,888 INFO L276 IsEmpty]: Start isEmpty. Operand 32171 states and 48661 transitions. [2021-02-19 18:20:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-02-19 18:20:54,954 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:20:54,955 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] [2021-02-19 18:20:54,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 18:20:54,955 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:20:54,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:54,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1987076995, now seen corresponding path program 1 times [2021-02-19 18:20:54,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:54,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822324317] [2021-02-19 18:20:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:55,175 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:55,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:55,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:55,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:20:55,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:55,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:55,955 WARN L202 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-19 18:20:55,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:20:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:55,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:55,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:56,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:56,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822324317] [2021-02-19 18:20:56,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:20:56,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:20:56,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219656368] [2021-02-19 18:20:56,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:20:56,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:56,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:20:56,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:20:56,139 INFO L87 Difference]: Start difference. First operand 32171 states and 48661 transitions. Second operand 4 states. [2021-02-19 18:21:06,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:06,915 INFO L93 Difference]: Finished difference Result 94573 states and 142734 transitions. [2021-02-19 18:21:06,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:21:06,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2021-02-19 18:21:06,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:07,044 INFO L225 Difference]: With dead ends: 94573 [2021-02-19 18:21:07,045 INFO L226 Difference]: Without dead ends: 62923 [2021-02-19 18:21:07,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:21:07,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62923 states. [2021-02-19 18:21:10,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62923 to 62921. [2021-02-19 18:21:10,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62921 states. [2021-02-19 18:21:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62921 states to 62921 states and 94494 transitions. [2021-02-19 18:21:10,129 INFO L78 Accepts]: Start accepts. Automaton has 62921 states and 94494 transitions. Word has length 332 [2021-02-19 18:21:10,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:10,129 INFO L480 AbstractCegarLoop]: Abstraction has 62921 states and 94494 transitions. [2021-02-19 18:21:10,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:21:10,130 INFO L276 IsEmpty]: Start isEmpty. Operand 62921 states and 94494 transitions. [2021-02-19 18:21:10,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-02-19 18:21:10,179 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:21:10,179 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] [2021-02-19 18:21:10,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 18:21:10,180 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:21:10,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:10,180 INFO L82 PathProgramCache]: Analyzing trace with hash -181056678, now seen corresponding path program 1 times [2021-02-19 18:21:10,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:10,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361602869] [2021-02-19 18:21:10,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:10,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:10,820 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:21:10,820 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:10,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:21:10,827 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-19 18:21:10,828 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-19 18:21:10,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:10,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-19 18:21:10,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:10,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:21:11,701 WARN L202 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-19 18:21:11,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:21:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:11,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:11,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:21:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:12,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361602869] [2021-02-19 18:21:12,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:21:12,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:21:12,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090389877] [2021-02-19 18:21:12,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:21:12,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:12,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:21:12,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:21:12,008 INFO L87 Difference]: Start difference. First operand 62921 states and 94494 transitions. Second operand 6 states. [2021-02-19 18:21:23,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:23,603 INFO L93 Difference]: Finished difference Result 186176 states and 279088 transitions. [2021-02-19 18:21:23,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:21:23,604 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 332 [2021-02-19 18:21:23,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:23,828 INFO L225 Difference]: With dead ends: 186176 [2021-02-19 18:21:23,829 INFO L226 Difference]: Without dead ends: 123410 [2021-02-19 18:21:23,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:21:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123410 states. [2021-02-19 18:21:29,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123410 to 123408. [2021-02-19 18:21:29,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123408 states. [2021-02-19 18:21:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123408 states to 123408 states and 183988 transitions. [2021-02-19 18:21:30,292 INFO L78 Accepts]: Start accepts. Automaton has 123408 states and 183988 transitions. Word has length 332 [2021-02-19 18:21:30,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:30,292 INFO L480 AbstractCegarLoop]: Abstraction has 123408 states and 183988 transitions. [2021-02-19 18:21:30,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 18:21:30,292 INFO L276 IsEmpty]: Start isEmpty. Operand 123408 states and 183988 transitions. [2021-02-19 18:21:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-02-19 18:21:30,429 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:21:30,429 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] [2021-02-19 18:21:30,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 18:21:30,430 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:21:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:30,430 INFO L82 PathProgramCache]: Analyzing trace with hash -989792084, now seen corresponding path program 1 times [2021-02-19 18:21:30,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:30,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808302186] [2021-02-19 18:21:30,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:30,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:30,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:21:30,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:30,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:21:30,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:30,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-19 18:21:30,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:30,813 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:21:31,434 WARN L202 SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-19 18:21:31,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:21:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:31,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:31,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:21:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:31,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808302186] [2021-02-19 18:21:31,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:21:31,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:21:31,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418970440] [2021-02-19 18:21:31,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:21:31,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:31,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:21:31,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:21:31,812 INFO L87 Difference]: Start difference. First operand 123408 states and 183988 transitions. Second operand 5 states. [2021-02-19 18:21:48,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:48,882 INFO L93 Difference]: Finished difference Result 364427 states and 542281 transitions. [2021-02-19 18:21:48,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:21:48,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2021-02-19 18:21:48,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:49,458 INFO L225 Difference]: With dead ends: 364427 [2021-02-19 18:21:49,458 INFO L226 Difference]: Without dead ends: 241305 [2021-02-19 18:21:49,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:21:49,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241305 states. [2021-02-19 18:22:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241305 to 241303. [2021-02-19 18:22:01,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241303 states. [2021-02-19 18:22:01,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241303 states to 241303 states and 356836 transitions. [2021-02-19 18:22:01,860 INFO L78 Accepts]: Start accepts. Automaton has 241303 states and 356836 transitions. Word has length 332 [2021-02-19 18:22:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:01,861 INFO L480 AbstractCegarLoop]: Abstraction has 241303 states and 356836 transitions. [2021-02-19 18:22:01,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-19 18:22:01,861 INFO L276 IsEmpty]: Start isEmpty. Operand 241303 states and 356836 transitions. [2021-02-19 18:22:02,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-02-19 18:22:02,632 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:22:02,632 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] [2021-02-19 18:22:02,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-19 18:22:02,633 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:22:02,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:02,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1009981714, now seen corresponding path program 1 times [2021-02-19 18:22:02,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:02,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748654953] [2021-02-19 18:22:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:02,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:02,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:02,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:02,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:22:02,800 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:02,801 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:03,500 WARN L202 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-19 18:22:03,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:22:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:03,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:03,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:03,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748654953] [2021-02-19 18:22:03,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:22:03,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:22:03,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77353432] [2021-02-19 18:22:03,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:22:03,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:03,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:22:03,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:22:03,767 INFO L87 Difference]: Start difference. First operand 241303 states and 356836 transitions. Second operand 4 states. [2021-02-19 18:22:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:32,062 INFO L93 Difference]: Finished difference Result 710956 states and 1048776 transitions. [2021-02-19 18:22:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:22:32,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2021-02-19 18:22:32,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:33,108 INFO L225 Difference]: With dead ends: 710956 [2021-02-19 18:22:33,109 INFO L226 Difference]: Without dead ends: 472170 [2021-02-19 18:22:33,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:22:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472170 states.