/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gr2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:34:24,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:34:24,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:34:25,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 12:34:25,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 12:34:25,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 12:34:25,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 12:34:25,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 12:34:25,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 12:34:25,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 12:34:25,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 12:34:25,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 12:34:25,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 12:34:25,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 12:34:25,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 12:34:25,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 12:34:25,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 12:34:25,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 12:34:25,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 12:34:25,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 12:34:25,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 12:34:25,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 12:34:25,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 12:34:25,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 12:34:25,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 12:34:25,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 12:34:25,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 12:34:25,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 12:34:25,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 12:34:25,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 12:34:25,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 12:34:25,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 12:34:25,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 12:34:25,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 12:34:25,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 12:34:25,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 12:34:25,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 12:34:25,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 12:34:25,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:34:25,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:34:25,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:34:25,074 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 [2021-05-02 12:34:25,105 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:34:25,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:34:25,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:34:25,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:34:25,108 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:34:25,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:34:25,108 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:34:25,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:34:25,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:34:25,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:34:25,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:34:25,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:34:25,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:34:25,110 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:34:25,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:34:25,110 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:34:25,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:34:25,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:34:25,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:34:25,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:34:25,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:34:25,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:34:25,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:34:25,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:34:25,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:34:25,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:34:25,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:34:25,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:34:25,111 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:34:25,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:34:25,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:34:25,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:34:25,443 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:34:25,444 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:34:25,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gr2006.i [2021-05-02 12:34:25,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b268766/09bccfc7d1f44554af4e90783ce52cc9/FLAG1e2b17bb2 [2021-05-02 12:34:25,818 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:34:25,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006.i [2021-05-02 12:34:25,824 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b268766/09bccfc7d1f44554af4e90783ce52cc9/FLAG1e2b17bb2 [2021-05-02 12:34:26,230 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b268766/09bccfc7d1f44554af4e90783ce52cc9 [2021-05-02 12:34:26,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:34:26,238 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:34:26,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:34:26,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:34:26,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:34:26,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:34:26" (1/1) ... [2021-05-02 12:34:26,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@704ab675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:26, skipping insertion in model container [2021-05-02 12:34:26,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:34:26" (1/1) ... [2021-05-02 12:34:26,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:34:26,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:34:26,397 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006.i[895,908] [2021-05-02 12:34:26,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:34:26,412 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:34:26,422 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006.i[895,908] [2021-05-02 12:34:26,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:34:26,434 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:34:26,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:26 WrapperNode [2021-05-02 12:34:26,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:34:26,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:34:26,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:34:26,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:34:26,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:26" (1/1) ... [2021-05-02 12:34:26,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:26" (1/1) ... [2021-05-02 12:34:26,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:26" (1/1) ... [2021-05-02 12:34:26,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:26" (1/1) ... [2021-05-02 12:34:26,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:26" (1/1) ... [2021-05-02 12:34:26,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:26" (1/1) ... [2021-05-02 12:34:26,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:26" (1/1) ... [2021-05-02 12:34:26,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:34:26,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:34:26,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:34:26,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:34:26,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:26" (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 [2021-05-02 12:34:26,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:34:26,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:34:26,672 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:34:26,672 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 12:34:26,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:34:26,672 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:34:26,672 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:34:26,673 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:34:26,673 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 12:34:26,673 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 12:34:26,673 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:34:26,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:34:26,674 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 12:34:26,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:34:26,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 12:34:26,674 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:34:26,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:34:26,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:34:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:34:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:34:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:34:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:34:26,918 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:34:26,919 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 12:34:26,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:34:26 BoogieIcfgContainer [2021-05-02 12:34:26,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:34:26,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:34:26,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:34:26,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:34:26,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:34:26" (1/3) ... [2021-05-02 12:34:26,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a4c7e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:34:26, skipping insertion in model container [2021-05-02 12:34:26,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:26" (2/3) ... [2021-05-02 12:34:26,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a4c7e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:34:26, skipping insertion in model container [2021-05-02 12:34:26,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:34:26" (3/3) ... [2021-05-02 12:34:26,924 INFO L111 eAbstractionObserver]: Analyzing ICFG gr2006.i [2021-05-02 12:34:26,927 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:34:26,940 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:34:26,950 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:34:27,005 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:34:27,005 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:34:27,006 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:34:27,006 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:34:27,006 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:34:27,006 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:34:27,006 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:34:27,006 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:34:27,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:34:27,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 12:34:27,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:27,033 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:27,033 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:27,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:27,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1795296022, now seen corresponding path program 1 times [2021-05-02 12:34:27,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:27,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816822558] [2021-05-02 12:34:27,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:27,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:34:27,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:27,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816822558] [2021-05-02 12:34:27,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816822558] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:34:27,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:34:27,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 12:34:27,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000415822] [2021-05-02 12:34:27,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 12:34:27,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:27,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 12:34:27,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:34:27,293 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:27,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:27,345 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-05-02 12:34:27,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 12:34:27,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 12:34:27,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:27,350 INFO L225 Difference]: With dead ends: 33 [2021-05-02 12:34:27,350 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 12:34:27,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:34:27,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 12:34:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 12:34:27,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:27,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-05-02 12:34:27,373 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-05-02 12:34:27,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:27,374 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-05-02 12:34:27,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:27,374 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-05-02 12:34:27,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 12:34:27,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:27,374 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:27,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:34:27,375 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:27,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:27,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1744532035, now seen corresponding path program 1 times [2021-05-02 12:34:27,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:27,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917057627] [2021-05-02 12:34:27,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:27,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:34:27,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:27,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917057627] [2021-05-02 12:34:27,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917057627] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:34:27,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:34:27,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 12:34:27,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161018910] [2021-05-02 12:34:27,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 12:34:27,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:27,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 12:34:27,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 12:34:27,437 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:27,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:27,506 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-05-02 12:34:27,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 12:34:27,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 12:34:27,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:27,508 INFO L225 Difference]: With dead ends: 24 [2021-05-02 12:34:27,508 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 12:34:27,509 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 12:34:27,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 12:34:27,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-05-02 12:34:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 12:34:27,513 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2021-05-02 12:34:27,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:27,513 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 12:34:27,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:27,514 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 12:34:27,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 12:34:27,514 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:27,514 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:27,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 12:34:27,514 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:27,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:27,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1801790337, now seen corresponding path program 1 times [2021-05-02 12:34:27,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:27,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358805909] [2021-05-02 12:34:27,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:27,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:34:27,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:27,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358805909] [2021-05-02 12:34:27,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358805909] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:34:27,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:34:27,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 12:34:27,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598098803] [2021-05-02 12:34:27,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 12:34:27,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:27,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 12:34:27,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 12:34:27,565 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:27,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:27,603 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-02 12:34:27,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 12:34:27,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 12:34:27,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:27,604 INFO L225 Difference]: With dead ends: 28 [2021-05-02 12:34:27,604 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 12:34:27,605 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 12:34:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 12:34:27,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-02 12:34:27,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:27,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 12:34:27,609 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2021-05-02 12:34:27,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:27,609 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 12:34:27,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:27,609 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 12:34:27,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 12:34:27,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:27,609 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:27,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 12:34:27,610 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:27,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:27,610 INFO L82 PathProgramCache]: Analyzing trace with hash 799073317, now seen corresponding path program 1 times [2021-05-02 12:34:27,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:27,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681204354] [2021-05-02 12:34:27,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:27,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:34:27,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:27,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681204354] [2021-05-02 12:34:27,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681204354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:27,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064833502] [2021-05-02 12:34:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:27,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 12:34:27,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:27,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:27,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:34:27,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064833502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:27,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:27,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 12:34:27,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480721563] [2021-05-02 12:34:27,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 12:34:27,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:27,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 12:34:27,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 12:34:27,922 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:28,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:28,008 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-05-02 12:34:28,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 12:34:28,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-02 12:34:28,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:28,009 INFO L225 Difference]: With dead ends: 31 [2021-05-02 12:34:28,009 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 12:34:28,010 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:34:28,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 12:34:28,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-05-02 12:34:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-05-02 12:34:28,014 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2021-05-02 12:34:28,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:28,014 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-05-02 12:34:28,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-05-02 12:34:28,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 12:34:28,015 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:28,015 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:28,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:28,234 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:28,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:28,236 INFO L82 PathProgramCache]: Analyzing trace with hash 353874177, now seen corresponding path program 2 times [2021-05-02 12:34:28,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:28,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543234541] [2021-05-02 12:34:28,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:28,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:34:28,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:28,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543234541] [2021-05-02 12:34:28,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543234541] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:28,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995769403] [2021-05-02 12:34:28,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:28,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:34:28,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:28,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 12:34:28,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:28,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:28,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:28,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:28,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:28,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:28,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 12:34:28,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995769403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:28,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:28,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-05-02 12:34:28,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318561277] [2021-05-02 12:34:28,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 12:34:28,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:28,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 12:34:28,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-02 12:34:28,418 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:28,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:28,647 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-05-02 12:34:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 12:34:28,647 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-02 12:34:28,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:28,648 INFO L225 Difference]: With dead ends: 41 [2021-05-02 12:34:28,648 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 12:34:28,649 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:34:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 12:34:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-05-02 12:34:28,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-05-02 12:34:28,653 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2021-05-02 12:34:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:28,653 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-05-02 12:34:28,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:28,653 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-05-02 12:34:28,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 12:34:28,654 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:28,654 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:28,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:28,871 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:28,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:28,871 INFO L82 PathProgramCache]: Analyzing trace with hash -8244763, now seen corresponding path program 3 times [2021-05-02 12:34:28,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:28,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844077515] [2021-05-02 12:34:28,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:28,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 12:34:28,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:28,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844077515] [2021-05-02 12:34:28,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844077515] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:28,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389139699] [2021-05-02 12:34:28,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:29,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-02 12:34:29,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:29,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 12:34:29,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:29,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 12:34:29,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389139699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:29,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:29,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-05-02 12:34:29,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480718855] [2021-05-02 12:34:29,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 12:34:29,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:29,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 12:34:29,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:34:29,160 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:29,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:29,449 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2021-05-02 12:34:29,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 12:34:29,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-02 12:34:29,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:29,450 INFO L225 Difference]: With dead ends: 58 [2021-05-02 12:34:29,450 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 12:34:29,451 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 249.8ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-05-02 12:34:29,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 12:34:29,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2021-05-02 12:34:29,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:29,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 12:34:29,455 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2021-05-02 12:34:29,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:29,456 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 12:34:29,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:29,456 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 12:34:29,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 12:34:29,456 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:29,456 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:29,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:29,676 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:29,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:29,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1332332775, now seen corresponding path program 4 times [2021-05-02 12:34:29,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:29,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007660358] [2021-05-02 12:34:29,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:29,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 12:34:29,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:29,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007660358] [2021-05-02 12:34:29,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007660358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:29,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064703034] [2021-05-02 12:34:29,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:29,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:34:29,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:29,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 12:34:29,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:29,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 12:34:29,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064703034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:29,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:29,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-02 12:34:29,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69711560] [2021-05-02 12:34:29,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 12:34:29,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:29,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 12:34:29,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 12:34:29,876 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:30,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:30,025 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2021-05-02 12:34:30,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:34:30,025 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-02 12:34:30,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:30,026 INFO L225 Difference]: With dead ends: 57 [2021-05-02 12:34:30,026 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 12:34:30,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:34:30,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 12:34:30,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-02 12:34:30,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-02 12:34:30,032 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 34 [2021-05-02 12:34:30,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:30,032 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-02 12:34:30,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:30,032 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-02 12:34:30,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 12:34:30,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:30,033 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:30,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:30,253 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:30,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:30,254 INFO L82 PathProgramCache]: Analyzing trace with hash -2018404669, now seen corresponding path program 5 times [2021-05-02 12:34:30,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:30,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894948127] [2021-05-02 12:34:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:30,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 12:34:30,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:30,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894948127] [2021-05-02 12:34:30,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894948127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:30,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031996844] [2021-05-02 12:34:30,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:30,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-02 12:34:30,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:30,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 12:34:30,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:30,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:30,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:30,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:30,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:30,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:30,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:30,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:30,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:30,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:30,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 12:34:30,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031996844] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:30,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:30,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 12:34:30,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866610345] [2021-05-02 12:34:30,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 12:34:30,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:30,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 12:34:30,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:34:30,440 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:30,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:30,581 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2021-05-02 12:34:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 12:34:30,581 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-02 12:34:30,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:30,582 INFO L225 Difference]: With dead ends: 60 [2021-05-02 12:34:30,582 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 12:34:30,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:34:30,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 12:34:30,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 12:34:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:30,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-05-02 12:34:30,587 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 37 [2021-05-02 12:34:30,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:30,587 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-05-02 12:34:30,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:30,587 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-05-02 12:34:30,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 12:34:30,588 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:30,588 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:30,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:30,796 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:30,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:30,796 INFO L82 PathProgramCache]: Analyzing trace with hash -207705241, now seen corresponding path program 6 times [2021-05-02 12:34:30,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:30,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589070682] [2021-05-02 12:34:30,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:30,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 66 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 12:34:30,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:30,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589070682] [2021-05-02 12:34:30,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589070682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:30,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95541291] [2021-05-02 12:34:30,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:31,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-02 12:34:31,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:31,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 12:34:31,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:31,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:31,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:31,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:31,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:31,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:31,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:31,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:31,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:31,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:31,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:31,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:31,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:31,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:31,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:31,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:31,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 89 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 12:34:31,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95541291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:31,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:31,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-05-02 12:34:31,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675332898] [2021-05-02 12:34:31,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 12:34:31,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:31,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 12:34:31,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-05-02 12:34:31,175 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:31,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:31,650 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2021-05-02 12:34:31,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 12:34:31,650 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-02 12:34:31,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:31,651 INFO L225 Difference]: With dead ends: 76 [2021-05-02 12:34:31,651 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 12:34:31,652 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 374.7ms TimeCoverageRelationStatistics Valid=272, Invalid=658, Unknown=0, NotChecked=0, Total=930 [2021-05-02 12:34:31,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 12:34:31,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2021-05-02 12:34:31,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:31,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-05-02 12:34:31,656 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 40 [2021-05-02 12:34:31,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:31,656 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-05-02 12:34:31,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:31,656 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-05-02 12:34:31,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 12:34:31,666 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:31,666 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:31,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:31,886 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:31,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:31,886 INFO L82 PathProgramCache]: Analyzing trace with hash -580685275, now seen corresponding path program 7 times [2021-05-02 12:34:31,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:31,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211652958] [2021-05-02 12:34:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:31,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 99 proven. 77 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 12:34:31,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:31,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211652958] [2021-05-02 12:34:31,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211652958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:31,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093169765] [2021-05-02 12:34:31,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:31,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 12:34:31,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:32,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 99 proven. 77 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 12:34:32,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093169765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:32,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:32,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-05-02 12:34:32,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658847966] [2021-05-02 12:34:32,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 12:34:32,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:32,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 12:34:32,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:34:32,072 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:32,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:32,258 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2021-05-02 12:34:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 12:34:32,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-02 12:34:32,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:32,259 INFO L225 Difference]: With dead ends: 72 [2021-05-02 12:34:32,259 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 12:34:32,259 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-05-02 12:34:32,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 12:34:32,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 12:34:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-05-02 12:34:32,264 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 46 [2021-05-02 12:34:32,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:32,264 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-05-02 12:34:32,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:32,264 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-05-02 12:34:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 12:34:32,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:32,265 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:32,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 12:34:32,482 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:32,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:32,482 INFO L82 PathProgramCache]: Analyzing trace with hash -939960831, now seen corresponding path program 8 times [2021-05-02 12:34:32,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:32,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499339097] [2021-05-02 12:34:32,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:32,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 112 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 12:34:32,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:32,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499339097] [2021-05-02 12:34:32,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499339097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:32,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655319208] [2021-05-02 12:34:32,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:32,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:34:32,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:32,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 12:34:32,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:32,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 112 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 12:34:32,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655319208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:32,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:32,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-02 12:34:32,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447747842] [2021-05-02 12:34:32,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 12:34:32,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:32,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 12:34:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:34:32,803 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:33,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:33,014 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2021-05-02 12:34:33,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 12:34:33,014 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-02 12:34:33,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:33,015 INFO L225 Difference]: With dead ends: 75 [2021-05-02 12:34:33,015 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 12:34:33,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 211.6ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-05-02 12:34:33,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 12:34:33,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 12:34:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2021-05-02 12:34:33,020 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 49 [2021-05-02 12:34:33,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:33,020 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2021-05-02 12:34:33,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:33,020 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2021-05-02 12:34:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 12:34:33,021 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:33,021 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:33,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 12:34:33,238 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:33,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1059547995, now seen corresponding path program 9 times [2021-05-02 12:34:33,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:33,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994129249] [2021-05-02 12:34:33,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:33,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 125 proven. 126 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 12:34:33,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:33,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994129249] [2021-05-02 12:34:33,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994129249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:33,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844330963] [2021-05-02 12:34:33,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:33,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-02 12:34:33,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:33,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 12:34:33,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:33,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 203 proven. 57 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 12:34:33,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844330963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:33,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:33,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-05-02 12:34:33,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404569828] [2021-05-02 12:34:33,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 12:34:33,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:33,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 12:34:33,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-05-02 12:34:33,660 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:34,427 INFO L93 Difference]: Finished difference Result 158 states and 199 transitions. [2021-05-02 12:34:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 12:34:34,428 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-02 12:34:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:34,428 INFO L225 Difference]: With dead ends: 158 [2021-05-02 12:34:34,428 INFO L226 Difference]: Without dead ends: 137 [2021-05-02 12:34:34,430 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 743.1ms TimeCoverageRelationStatistics Valid=665, Invalid=1987, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 12:34:34,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-02 12:34:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 71. [2021-05-02 12:34:34,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-05-02 12:34:34,436 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 52 [2021-05-02 12:34:34,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:34,436 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-05-02 12:34:34,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-05-02 12:34:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 12:34:34,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:34,437 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:34,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:34,654 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:34,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1260434855, now seen corresponding path program 10 times [2021-05-02 12:34:34,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:34,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152622037] [2021-05-02 12:34:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:34,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 298 proven. 155 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 12:34:34,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:34,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152622037] [2021-05-02 12:34:34,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152622037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:34,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85650281] [2021-05-02 12:34:34,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:34,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:34:34,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:34,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 12:34:34,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:34,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 298 proven. 155 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 12:34:34,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85650281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:34,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:34,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-02 12:34:34,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814312699] [2021-05-02 12:34:34,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 12:34:34,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:34,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 12:34:34,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 12:34:34,916 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:35,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:35,215 INFO L93 Difference]: Finished difference Result 111 states and 132 transitions. [2021-05-02 12:34:35,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 12:34:35,216 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-02 12:34:35,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:35,216 INFO L225 Difference]: With dead ends: 111 [2021-05-02 12:34:35,217 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 12:34:35,217 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 289.4ms TimeCoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2021-05-02 12:34:35,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 12:34:35,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-05-02 12:34:35,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 69 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:35,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-05-02 12:34:35,224 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 70 [2021-05-02 12:34:35,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:35,224 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-05-02 12:34:35,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:35,224 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-05-02 12:34:35,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 12:34:35,225 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:35,225 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:35,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:35,447 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:35,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:35,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1954530691, now seen corresponding path program 11 times [2021-05-02 12:34:35,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:35,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3226403] [2021-05-02 12:34:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:35,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 326 proven. 187 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 12:34:35,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:35,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3226403] [2021-05-02 12:34:35,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3226403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:35,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018464830] [2021-05-02 12:34:35,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:35,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-05-02 12:34:35,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:35,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 12:34:35,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:35,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 326 proven. 187 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 12:34:35,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018464830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:35,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:35,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 12:34:35,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283197612] [2021-05-02 12:34:35,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 12:34:35,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:35,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 12:34:35,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:34:35,760 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:36,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:36,104 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2021-05-02 12:34:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 12:34:36,105 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-02 12:34:36,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:36,105 INFO L225 Difference]: With dead ends: 114 [2021-05-02 12:34:36,106 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 12:34:36,106 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 346.3ms TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2021-05-02 12:34:36,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 12:34:36,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-05-02 12:34:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 72 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2021-05-02 12:34:36,116 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 73 [2021-05-02 12:34:36,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:36,116 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2021-05-02 12:34:36,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:36,116 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2021-05-02 12:34:36,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 12:34:36,117 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:36,117 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:36,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 12:34:36,334 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:36,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:36,334 INFO L82 PathProgramCache]: Analyzing trace with hash -503949273, now seen corresponding path program 12 times [2021-05-02 12:34:36,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:36,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982176576] [2021-05-02 12:34:36,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:36,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 354 proven. 222 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 12:34:36,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:36,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982176576] [2021-05-02 12:34:36,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982176576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:36,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449641483] [2021-05-02 12:34:36,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:36,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-05-02 12:34:36,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:36,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 12:34:36,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:36,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 354 proven. 222 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 12:34:36,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449641483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:36,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:36,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-05-02 12:34:36,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598986694] [2021-05-02 12:34:36,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 12:34:36,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:36,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 12:34:36,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:34:36,638 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:37,057 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2021-05-02 12:34:37,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 12:34:37,057 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-02 12:34:37,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:37,058 INFO L225 Difference]: With dead ends: 117 [2021-05-02 12:34:37,058 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 12:34:37,058 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 396.6ms TimeCoverageRelationStatistics Valid=331, Invalid=539, Unknown=0, NotChecked=0, Total=870 [2021-05-02 12:34:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 12:34:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-05-02 12:34:37,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 75 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2021-05-02 12:34:37,066 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 76 [2021-05-02 12:34:37,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:37,067 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2021-05-02 12:34:37,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:37,067 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2021-05-02 12:34:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 12:34:37,067 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:37,068 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:37,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 12:34:37,284 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:37,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:37,285 INFO L82 PathProgramCache]: Analyzing trace with hash 996741891, now seen corresponding path program 13 times [2021-05-02 12:34:37,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:37,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400219162] [2021-05-02 12:34:37,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:37,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 382 proven. 260 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 12:34:37,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:37,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400219162] [2021-05-02 12:34:37,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400219162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:37,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099942125] [2021-05-02 12:34:37,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:37,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 12:34:37,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:37,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 382 proven. 260 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 12:34:37,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099942125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:37,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:37,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-05-02 12:34:37,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182454220] [2021-05-02 12:34:37,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 12:34:37,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:37,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 12:34:37,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 12:34:37,599 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:37,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:37,952 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2021-05-02 12:34:37,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 12:34:37,953 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-02 12:34:37,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:37,953 INFO L225 Difference]: With dead ends: 120 [2021-05-02 12:34:37,953 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 12:34:37,954 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 368.4ms TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2021-05-02 12:34:37,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 12:34:37,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-05-02 12:34:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.141025641025641) internal successors, (89), 78 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:37,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2021-05-02 12:34:37,959 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 79 [2021-05-02 12:34:37,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:37,959 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-05-02 12:34:37,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:37,960 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2021-05-02 12:34:37,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 12:34:37,960 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:37,960 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:38,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 12:34:38,177 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:38,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:38,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1772624551, now seen corresponding path program 14 times [2021-05-02 12:34:38,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:38,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744030147] [2021-05-02 12:34:38,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:38,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 410 proven. 301 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 12:34:38,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:38,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744030147] [2021-05-02 12:34:38,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744030147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:38,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117427305] [2021-05-02 12:34:38,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:38,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:34:38,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:38,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 12:34:38,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:38,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 410 proven. 301 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 12:34:38,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117427305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:38,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:38,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-02 12:34:38,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472400340] [2021-05-02 12:34:38,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 12:34:38,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:38,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 12:34:38,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 12:34:38,613 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:39,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:39,015 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2021-05-02 12:34:39,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 12:34:39,015 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-02 12:34:39,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:39,016 INFO L225 Difference]: With dead ends: 123 [2021-05-02 12:34:39,016 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 12:34:39,016 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 435.4ms TimeCoverageRelationStatistics Valid=426, Invalid=696, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 12:34:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 12:34:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-05-02 12:34:39,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2021-05-02 12:34:39,021 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 82 [2021-05-02 12:34:39,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:39,021 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2021-05-02 12:34:39,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2021-05-02 12:34:39,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 12:34:39,021 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:39,021 INFO L523 BasicCegarLoop]: trace histogram [25, 24, 15, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:39,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:39,237 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:39,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:39,238 INFO L82 PathProgramCache]: Analyzing trace with hash 578961539, now seen corresponding path program 15 times [2021-05-02 12:34:39,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:39,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038386915] [2021-05-02 12:34:39,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:39,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 438 proven. 345 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 12:34:39,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:39,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038386915] [2021-05-02 12:34:39,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038386915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:39,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986027429] [2021-05-02 12:34:39,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:39,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-05-02 12:34:39,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:39,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 12:34:39,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:39,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 438 proven. 345 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 12:34:39,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986027429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:39,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:39,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-02 12:34:39,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300577511] [2021-05-02 12:34:39,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 12:34:39,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:39,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 12:34:39,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 12:34:39,654 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:40,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:40,064 INFO L93 Difference]: Finished difference Result 126 states and 147 transitions. [2021-05-02 12:34:40,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 12:34:40,065 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-05-02 12:34:40,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:40,065 INFO L225 Difference]: With dead ends: 126 [2021-05-02 12:34:40,065 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 12:34:40,067 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 12:34:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 12:34:40,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-05-02 12:34:40,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.130952380952381) internal successors, (95), 84 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:40,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2021-05-02 12:34:40,071 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 85 [2021-05-02 12:34:40,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:40,071 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2021-05-02 12:34:40,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:40,071 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2021-05-02 12:34:40,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 12:34:40,072 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:40,072 INFO L523 BasicCegarLoop]: trace histogram [26, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:40,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 12:34:40,289 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:40,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:40,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1801585369, now seen corresponding path program 16 times [2021-05-02 12:34:40,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:40,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085101492] [2021-05-02 12:34:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:40,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 466 proven. 392 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 12:34:40,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:40,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085101492] [2021-05-02 12:34:40,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085101492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:40,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760495309] [2021-05-02 12:34:40,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:40,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:34:40,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:40,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 12:34:40,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:40,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 466 proven. 392 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 12:34:40,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760495309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:40,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:40,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2021-05-02 12:34:40,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152008171] [2021-05-02 12:34:40,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 12:34:40,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:40,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 12:34:40,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 12:34:40,696 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:41,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:41,183 INFO L93 Difference]: Finished difference Result 129 states and 150 transitions. [2021-05-02 12:34:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 12:34:41,183 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-02 12:34:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:41,184 INFO L225 Difference]: With dead ends: 129 [2021-05-02 12:34:41,184 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 12:34:41,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 506.5ms TimeCoverageRelationStatistics Valid=533, Invalid=873, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 12:34:41,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 12:34:41,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 12:34:41,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 87 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2021-05-02 12:34:41,189 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 88 [2021-05-02 12:34:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:41,189 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2021-05-02 12:34:41,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:41,189 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2021-05-02 12:34:41,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 12:34:41,190 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:41,190 INFO L523 BasicCegarLoop]: trace histogram [27, 26, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:41,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:41,407 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:41,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:41,408 INFO L82 PathProgramCache]: Analyzing trace with hash 2120437251, now seen corresponding path program 17 times [2021-05-02 12:34:41,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:41,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695111751] [2021-05-02 12:34:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:41,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 494 proven. 442 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 12:34:41,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:41,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695111751] [2021-05-02 12:34:41,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695111751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:41,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518906689] [2021-05-02 12:34:41,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:41,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2021-05-02 12:34:41,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:41,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 12:34:41,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:41,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 494 proven. 442 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 12:34:41,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518906689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:41,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:41,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-02 12:34:41,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697501995] [2021-05-02 12:34:41,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 12:34:41,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:41,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 12:34:41,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 12:34:41,781 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:42,245 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2021-05-02 12:34:42,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 12:34:42,245 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-05-02 12:34:42,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:42,246 INFO L225 Difference]: With dead ends: 132 [2021-05-02 12:34:42,246 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 12:34:42,247 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 520.2ms TimeCoverageRelationStatistics Valid=591, Invalid=969, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 12:34:42,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 12:34:42,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-05-02 12:34:42,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 90 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2021-05-02 12:34:42,252 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 91 [2021-05-02 12:34:42,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:42,252 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2021-05-02 12:34:42,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:42,252 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2021-05-02 12:34:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 12:34:42,253 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:42,253 INFO L523 BasicCegarLoop]: trace histogram [28, 27, 18, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:42,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:42,471 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:42,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:42,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1488978009, now seen corresponding path program 18 times [2021-05-02 12:34:42,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:42,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68485689] [2021-05-02 12:34:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:42,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 522 proven. 495 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 12:34:42,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:42,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68485689] [2021-05-02 12:34:42,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68485689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:42,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055847559] [2021-05-02 12:34:42,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:42,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-05-02 12:34:42,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:42,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 12:34:42,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:42,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:42,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 814 proven. 262 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-05-02 12:34:43,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055847559] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:43,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:43,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 36 [2021-05-02 12:34:43,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459306714] [2021-05-02 12:34:43,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 12:34:43,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:43,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 12:34:43,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=929, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 12:34:43,104 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 35 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:44,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:44,816 INFO L93 Difference]: Finished difference Result 259 states and 324 transitions. [2021-05-02 12:34:44,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 12:34:44,816 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 35 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-02 12:34:44,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:44,817 INFO L225 Difference]: With dead ends: 259 [2021-05-02 12:34:44,817 INFO L226 Difference]: Without dead ends: 223 [2021-05-02 12:34:44,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 1698.1ms TimeCoverageRelationStatistics Valid=1628, Invalid=5014, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 12:34:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-05-02 12:34:44,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 110. [2021-05-02 12:34:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 105 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:44,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2021-05-02 12:34:44,825 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 94 [2021-05-02 12:34:44,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:44,825 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2021-05-02 12:34:44,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 35 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:44,826 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2021-05-02 12:34:44,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 12:34:44,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:44,826 INFO L523 BasicCegarLoop]: trace histogram [33, 32, 19, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:45,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 12:34:45,042 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:45,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:45,043 INFO L82 PathProgramCache]: Analyzing trace with hash 221381891, now seen corresponding path program 19 times [2021-05-02 12:34:45,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:45,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136297157] [2021-05-02 12:34:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:45,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 786 proven. 551 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-05-02 12:34:45,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:45,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136297157] [2021-05-02 12:34:45,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136297157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:45,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160502277] [2021-05-02 12:34:45,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:45,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 12:34:45,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:45,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 786 proven. 551 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-05-02 12:34:45,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160502277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:45,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:45,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2021-05-02 12:34:45,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165195255] [2021-05-02 12:34:45,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 12:34:45,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:45,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 12:34:45,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 12:34:45,522 INFO L87 Difference]: Start difference. First operand 110 states and 124 transitions. Second operand has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 23 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:46,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:46,096 INFO L93 Difference]: Finished difference Result 162 states and 191 transitions. [2021-05-02 12:34:46,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 12:34:46,097 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 23 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2021-05-02 12:34:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:46,098 INFO L225 Difference]: With dead ends: 162 [2021-05-02 12:34:46,098 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 12:34:46,098 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 630.2ms TimeCoverageRelationStatistics Valid=716, Invalid=1176, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 12:34:46,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 12:34:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-05-02 12:34:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.1388888888888888) internal successors, (123), 108 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2021-05-02 12:34:46,104 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 109 [2021-05-02 12:34:46,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:46,104 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2021-05-02 12:34:46,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 23 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:46,105 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2021-05-02 12:34:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 12:34:46,105 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:46,105 INFO L523 BasicCegarLoop]: trace histogram [34, 33, 20, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:46,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:46,322 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:46,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:46,322 INFO L82 PathProgramCache]: Analyzing trace with hash -976546393, now seen corresponding path program 20 times [2021-05-02 12:34:46,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:46,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976356399] [2021-05-02 12:34:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:46,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 826 proven. 610 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-05-02 12:34:46,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:46,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976356399] [2021-05-02 12:34:46,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976356399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:46,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650332793] [2021-05-02 12:34:46,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:46,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:34:46,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:46,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 12:34:46,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:46,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 826 proven. 610 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-05-02 12:34:46,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650332793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:46,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:46,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-02 12:34:46,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686540718] [2021-05-02 12:34:46,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 12:34:46,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:46,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 12:34:46,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 12:34:46,760 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:47,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:47,392 INFO L93 Difference]: Finished difference Result 165 states and 194 transitions. [2021-05-02 12:34:47,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 12:34:47,393 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-05-02 12:34:47,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:47,393 INFO L225 Difference]: With dead ends: 165 [2021-05-02 12:34:47,393 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 12:34:47,394 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 683.2ms TimeCoverageRelationStatistics Valid=783, Invalid=1287, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 12:34:47,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 12:34:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-05-02 12:34:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.135135135135135) internal successors, (126), 111 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2021-05-02 12:34:47,400 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 112 [2021-05-02 12:34:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:47,400 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2021-05-02 12:34:47,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2021-05-02 12:34:47,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-02 12:34:47,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:47,401 INFO L523 BasicCegarLoop]: trace histogram [35, 34, 21, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:47,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 12:34:47,619 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:47,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:47,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1574792573, now seen corresponding path program 21 times [2021-05-02 12:34:47,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:47,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530200209] [2021-05-02 12:34:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:47,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 866 proven. 672 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-05-02 12:34:47,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:47,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530200209] [2021-05-02 12:34:47,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530200209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:47,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464546247] [2021-05-02 12:34:47,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:47,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2021-05-02 12:34:47,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:47,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 12:34:47,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:47,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:47,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 1211 proven. 534 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 12:34:48,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464546247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:48,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:48,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 47 [2021-05-02 12:34:48,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422404376] [2021-05-02 12:34:48,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 12:34:48,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:48,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 12:34:48,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=1609, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 12:34:48,582 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 47 states, 47 states have (on average 3.3191489361702127) internal successors, (156), 46 states have internal predecessors, (156), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:50,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:50,809 INFO L93 Difference]: Finished difference Result 512 states and 661 transitions. [2021-05-02 12:34:50,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 12:34:50,810 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.3191489361702127) internal successors, (156), 46 states have internal predecessors, (156), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2021-05-02 12:34:50,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:50,821 INFO L225 Difference]: With dead ends: 512 [2021-05-02 12:34:50,821 INFO L226 Difference]: Without dead ends: 464 [2021-05-02 12:34:50,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3383 ImplicationChecksByTransitivity, 2373.1ms TimeCoverageRelationStatistics Valid=2789, Invalid=9643, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 12:34:50,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-05-02 12:34:50,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 143. [2021-05-02 12:34:50,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.1666666666666667) internal successors, (161), 138 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 165 transitions. [2021-05-02 12:34:50,844 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 165 transitions. Word has length 115 [2021-05-02 12:34:50,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:50,844 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 165 transitions. [2021-05-02 12:34:50,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 3.3191489361702127) internal successors, (156), 46 states have internal predecessors, (156), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 165 transitions. [2021-05-02 12:34:50,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-02 12:34:50,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:50,845 INFO L523 BasicCegarLoop]: trace histogram [44, 43, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:51,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 12:34:51,045 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:51,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:51,046 INFO L82 PathProgramCache]: Analyzing trace with hash -133939417, now seen corresponding path program 22 times [2021-05-02 12:34:51,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:51,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704562789] [2021-05-02 12:34:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:51,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1450 proven. 737 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-05-02 12:34:51,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:51,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704562789] [2021-05-02 12:34:51,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704562789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:51,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812617986] [2021-05-02 12:34:51,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:51,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:34:51,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:51,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 12:34:51,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:51,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:51,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:52,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:52,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:52,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:52,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:52,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:52,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:52,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:52,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:52,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:52,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:52,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:52,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 406 proven. 2420 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 12:34:52,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812617986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:52,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:52,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 43] total 45 [2021-05-02 12:34:52,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810019604] [2021-05-02 12:34:52,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 12:34:52,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:52,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 12:34:52,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 12:34:52,272 INFO L87 Difference]: Start difference. First operand 143 states and 165 transitions. Second operand has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 44 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:53,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:53,906 INFO L93 Difference]: Finished difference Result 273 states and 336 transitions. [2021-05-02 12:34:53,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 12:34:53,906 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 44 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2021-05-02 12:34:53,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:53,907 INFO L225 Difference]: With dead ends: 273 [2021-05-02 12:34:53,907 INFO L226 Difference]: Without dead ends: 201 [2021-05-02 12:34:53,908 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 2189.2ms TimeCoverageRelationStatistics Valid=2753, Invalid=4557, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 12:34:53,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-02 12:34:53,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2021-05-02 12:34:53,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.117948717948718) internal successors, (218), 195 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 222 transitions. [2021-05-02 12:34:53,919 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 222 transitions. Word has length 142 [2021-05-02 12:34:53,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:53,919 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 222 transitions. [2021-05-02 12:34:53,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 44 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:53,920 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 222 transitions. [2021-05-02 12:34:53,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-05-02 12:34:53,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:53,920 INFO L523 BasicCegarLoop]: trace histogram [63, 62, 41, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:54,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:54,136 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:54,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:54,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2069400707, now seen corresponding path program 23 times [2021-05-02 12:34:54,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:54,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763758248] [2021-05-02 12:34:54,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:54,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 2666 proven. 2542 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-05-02 12:34:54,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:54,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763758248] [2021-05-02 12:34:54,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763758248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:54,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192526072] [2021-05-02 12:34:54,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:55,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2021-05-02 12:34:55,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:55,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 12:34:55,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:55,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 2666 proven. 2542 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-05-02 12:34:55,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192526072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:55,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:55,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-02 12:34:55,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170014285] [2021-05-02 12:34:55,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 12:34:55,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:55,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 12:34:55,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 12:34:55,322 INFO L87 Difference]: Start difference. First operand 200 states and 222 transitions. Second operand has 46 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 45 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:56,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:56,996 INFO L93 Difference]: Finished difference Result 276 states and 321 transitions. [2021-05-02 12:34:56,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 12:34:56,997 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 45 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2021-05-02 12:34:56,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:56,997 INFO L225 Difference]: With dead ends: 276 [2021-05-02 12:34:56,997 INFO L226 Difference]: Without dead ends: 204 [2021-05-02 12:34:56,999 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 2180.5ms TimeCoverageRelationStatistics Valid=2883, Invalid=4773, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 12:34:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-02 12:34:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2021-05-02 12:34:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.1161616161616161) internal successors, (221), 198 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:57,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 225 transitions. [2021-05-02 12:34:57,010 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 225 transitions. Word has length 199 [2021-05-02 12:34:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:57,010 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 225 transitions. [2021-05-02 12:34:57,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 45 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 225 transitions. [2021-05-02 12:34:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-02 12:34:57,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:57,011 INFO L523 BasicCegarLoop]: trace histogram [64, 63, 42, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:57,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 12:34:57,227 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:57,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:57,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1971505113, now seen corresponding path program 24 times [2021-05-02 12:34:57,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:57,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861867923] [2021-05-02 12:34:57,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:58,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 2730 proven. 2667 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-05-02 12:34:58,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:58,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861867923] [2021-05-02 12:34:58,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861867923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:58,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924466685] [2021-05-02 12:34:58,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:58,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2021-05-02 12:34:58,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:58,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 12:34:58,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:58,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:58,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 4453 proven. 1366 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-05-02 12:34:59,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924466685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:59,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:59,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 34] total 78 [2021-05-02 12:34:59,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42178664] [2021-05-02 12:34:59,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 12:34:59,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:59,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 12:34:59,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1552, Invalid=4454, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 12:34:59,514 INFO L87 Difference]: Start difference. First operand 203 states and 225 transitions. Second operand has 78 states, 78 states have (on average 3.3461538461538463) internal successors, (261), 77 states have internal predecessors, (261), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:04,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:35:04,867 INFO L93 Difference]: Finished difference Result 949 states and 1224 transitions. [2021-05-02 12:35:04,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-02 12:35:04,868 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.3461538461538463) internal successors, (261), 77 states have internal predecessors, (261), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2021-05-02 12:35:04,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:35:04,870 INFO L225 Difference]: With dead ends: 949 [2021-05-02 12:35:04,870 INFO L226 Difference]: Without dead ends: 877 [2021-05-02 12:35:04,872 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8781 ImplicationChecksByTransitivity, 5945.2ms TimeCoverageRelationStatistics Valid=7661, Invalid=26011, Unknown=0, NotChecked=0, Total=33672 [2021-05-02 12:35:04,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-05-02 12:35:04,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 236. [2021-05-02 12:35:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.1428571428571428) internal successors, (264), 231 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:04,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 268 transitions. [2021-05-02 12:35:04,898 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 268 transitions. Word has length 202 [2021-05-02 12:35:04,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:35:04,898 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 268 transitions. [2021-05-02 12:35:04,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 3.3461538461538463) internal successors, (261), 77 states have internal predecessors, (261), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:04,898 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 268 transitions. [2021-05-02 12:35:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-05-02 12:35:04,899 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:35:04,899 INFO L523 BasicCegarLoop]: trace histogram [75, 74, 43, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:35:05,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:35:05,115 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:35:05,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:35:05,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1982129725, now seen corresponding path program 25 times [2021-05-02 12:35:05,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:35:05,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443222072] [2021-05-02 12:35:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:35:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:06,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:35:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8325 backedges. 4104 proven. 2795 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-05-02 12:35:06,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:35:06,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443222072] [2021-05-02 12:35:06,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443222072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:06,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633504477] [2021-05-02 12:35:06,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:35:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:06,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 12:35:06,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:35:06,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8325 backedges. 4104 proven. 2795 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-05-02 12:35:06,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633504477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:06,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:35:06,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2021-05-02 12:35:06,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727081541] [2021-05-02 12:35:06,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 12:35:06,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:35:06,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 12:35:06,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 12:35:06,475 INFO L87 Difference]: Start difference. First operand 236 states and 268 transitions. Second operand has 48 states, 48 states have (on average 3.0416666666666665) internal successors, (146), 47 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:08,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:35:08,453 INFO L93 Difference]: Finished difference Result 342 states and 407 transitions. [2021-05-02 12:35:08,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 12:35:08,454 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0416666666666665) internal successors, (146), 47 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2021-05-02 12:35:08,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:35:08,455 INFO L225 Difference]: With dead ends: 342 [2021-05-02 12:35:08,455 INFO L226 Difference]: Without dead ends: 240 [2021-05-02 12:35:08,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 2508.6ms TimeCoverageRelationStatistics Valid=3152, Invalid=5220, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 12:35:08,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-02 12:35:08,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2021-05-02 12:35:08,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.141025641025641) internal successors, (267), 234 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:08,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 271 transitions. [2021-05-02 12:35:08,478 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 271 transitions. Word has length 235 [2021-05-02 12:35:08,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:35:08,478 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 271 transitions. [2021-05-02 12:35:08,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 3.0416666666666665) internal successors, (146), 47 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:08,478 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 271 transitions. [2021-05-02 12:35:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-05-02 12:35:08,479 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:35:08,479 INFO L523 BasicCegarLoop]: trace histogram [76, 75, 44, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:35:08,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 12:35:08,695 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:35:08,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:35:08,695 INFO L82 PathProgramCache]: Analyzing trace with hash -2000043161, now seen corresponding path program 26 times [2021-05-02 12:35:08,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:35:08,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398000222] [2021-05-02 12:35:08,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:35:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:09,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:35:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 4198 proven. 2926 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-05-02 12:35:09,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:35:09,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398000222] [2021-05-02 12:35:09,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398000222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:09,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877802425] [2021-05-02 12:35:09,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:35:09,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:35:09,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:35:09,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 12:35:09,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:35:09,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:09,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:10,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:10,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:10,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:10,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:10,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:10,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:10,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:10,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:10,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:10,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:10,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:10,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:10,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:10,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:10,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:10,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 4198 proven. 2926 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-05-02 12:35:10,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877802425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:10,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:35:10,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-02 12:35:10,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961905139] [2021-05-02 12:35:10,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 12:35:10,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:35:10,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 12:35:10,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 12:35:10,115 INFO L87 Difference]: Start difference. First operand 239 states and 271 transitions. Second operand has 49 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 48 states have internal predecessors, (149), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:12,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:35:12,096 INFO L93 Difference]: Finished difference Result 345 states and 410 transitions. [2021-05-02 12:35:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 12:35:12,096 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 48 states have internal predecessors, (149), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 238 [2021-05-02 12:35:12,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:35:12,097 INFO L225 Difference]: With dead ends: 345 [2021-05-02 12:35:12,097 INFO L226 Difference]: Without dead ends: 243 [2021-05-02 12:35:12,124 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 2572.4ms TimeCoverageRelationStatistics Valid=3291, Invalid=5451, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 12:35:12,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-02 12:35:12,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2021-05-02 12:35:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 237 states have (on average 1.139240506329114) internal successors, (270), 237 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 274 transitions. [2021-05-02 12:35:12,169 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 274 transitions. Word has length 238 [2021-05-02 12:35:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:35:12,169 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 274 transitions. [2021-05-02 12:35:12,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 48 states have internal predecessors, (149), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 274 transitions. [2021-05-02 12:35:12,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-05-02 12:35:12,170 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:35:12,171 INFO L523 BasicCegarLoop]: trace histogram [77, 76, 45, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:35:12,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 12:35:12,385 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:35:12,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:35:12,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1211696963, now seen corresponding path program 27 times [2021-05-02 12:35:12,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:35:12,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194716562] [2021-05-02 12:35:12,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:35:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:13,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:35:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:13,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 4292 proven. 3060 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-05-02 12:35:13,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:35:13,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194716562] [2021-05-02 12:35:13,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194716562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:13,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135348801] [2021-05-02 12:35:13,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:35:13,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2021-05-02 12:35:13,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:35:13,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 79 conjunts are in the unsatisfiable core [2021-05-02 12:35:13,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:35:13,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:13,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:13,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:13,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:13,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:13,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:13,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:13,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:13,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:13,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:13,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:13,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:13,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:13,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:13,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:13,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:14,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:15,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 5738 proven. 2946 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-05-02 12:35:16,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135348801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:16,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:35:16,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 95 [2021-05-02 12:35:16,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285026175] [2021-05-02 12:35:16,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 12:35:16,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:35:16,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 12:35:16,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2257, Invalid=6673, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 12:35:16,121 INFO L87 Difference]: Start difference. First operand 242 states and 274 transitions. Second operand has 95 states, 95 states have (on average 3.3473684210526318) internal successors, (318), 94 states have internal predecessors, (318), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:24,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:35:24,227 INFO L93 Difference]: Finished difference Result 1706 states and 2233 transitions. [2021-05-02 12:35:24,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-05-02 12:35:24,227 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.3473684210526318) internal successors, (318), 94 states have internal predecessors, (318), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 241 [2021-05-02 12:35:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:35:24,232 INFO L225 Difference]: With dead ends: 1706 [2021-05-02 12:35:24,232 INFO L226 Difference]: Without dead ends: 1604 [2021-05-02 12:35:24,234 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15347 ImplicationChecksByTransitivity, 8863.3ms TimeCoverageRelationStatistics Valid=11357, Invalid=42235, Unknown=0, NotChecked=0, Total=53592 [2021-05-02 12:35:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-05-02 12:35:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 287. [2021-05-02 12:35:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.1666666666666667) internal successors, (329), 282 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 333 transitions. [2021-05-02 12:35:24,289 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 333 transitions. Word has length 241 [2021-05-02 12:35:24,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:35:24,289 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 333 transitions. [2021-05-02 12:35:24,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 3.3473684210526318) internal successors, (318), 94 states have internal predecessors, (318), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:24,289 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 333 transitions. [2021-05-02 12:35:24,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-05-02 12:35:24,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:35:24,290 INFO L523 BasicCegarLoop]: trace histogram [92, 91, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:35:24,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:35:24,507 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:35:24,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:35:24,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1833823705, now seen corresponding path program 28 times [2021-05-02 12:35:24,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:35:24,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445460545] [2021-05-02 12:35:24,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:35:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:25,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:35:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12558 backedges. 6346 proven. 3197 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2021-05-02 12:35:25,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:35:25,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445460545] [2021-05-02 12:35:25,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445460545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:25,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778159326] [2021-05-02 12:35:25,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:35:25,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:35:25,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:35:25,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 12:35:25,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:35:25,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:25,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:26,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:26,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:26,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:26,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:26,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:26,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:26,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:26,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:26,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:26,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:26,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:26,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:26,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:26,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12558 backedges. 6346 proven. 3197 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2021-05-02 12:35:26,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778159326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:26,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:35:26,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2021-05-02 12:35:26,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754950776] [2021-05-02 12:35:26,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 12:35:26,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:35:26,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 12:35:26,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 12:35:26,158 INFO L87 Difference]: Start difference. First operand 287 states and 333 transitions. Second operand has 51 states, 51 states have (on average 3.0392156862745097) internal successors, (155), 50 states have internal predecessors, (155), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:28,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:35:28,258 INFO L93 Difference]: Finished difference Result 435 states and 528 transitions. [2021-05-02 12:35:28,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 12:35:28,259 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.0392156862745097) internal successors, (155), 50 states have internal predecessors, (155), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 286 [2021-05-02 12:35:28,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:35:28,260 INFO L225 Difference]: With dead ends: 435 [2021-05-02 12:35:28,260 INFO L226 Difference]: Without dead ends: 291 [2021-05-02 12:35:28,261 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 2909.8ms TimeCoverageRelationStatistics Valid=3578, Invalid=5928, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 12:35:28,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-05-02 12:35:28,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2021-05-02 12:35:28,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.1649122807017545) internal successors, (332), 285 states have internal predecessors, (332), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:28,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 336 transitions. [2021-05-02 12:35:28,323 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 336 transitions. Word has length 286 [2021-05-02 12:35:28,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:35:28,324 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 336 transitions. [2021-05-02 12:35:28,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 3.0392156862745097) internal successors, (155), 50 states have internal predecessors, (155), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:28,324 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 336 transitions. [2021-05-02 12:35:28,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-05-02 12:35:28,325 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:35:28,326 INFO L523 BasicCegarLoop]: trace histogram [93, 92, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:35:28,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:35:28,541 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:35:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:35:28,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1246777853, now seen corresponding path program 29 times [2021-05-02 12:35:28,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:35:28,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746493322] [2021-05-02 12:35:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:35:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:29,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:35:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12834 backedges. 6482 proven. 3337 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2021-05-02 12:35:29,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:35:29,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746493322] [2021-05-02 12:35:29,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746493322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:29,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828342673] [2021-05-02 12:35:29,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:35:29,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 93 check-sat command(s) [2021-05-02 12:35:29,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:35:29,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 12:35:29,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:35:29,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:29,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12834 backedges. 6482 proven. 3337 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2021-05-02 12:35:30,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828342673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:30,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:35:30,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-02 12:35:30,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180454646] [2021-05-02 12:35:30,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 12:35:30,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:35:30,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 12:35:30,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 12:35:30,203 INFO L87 Difference]: Start difference. First operand 290 states and 336 transitions. Second operand has 52 states, 52 states have (on average 3.0384615384615383) internal successors, (158), 51 states have internal predecessors, (158), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:32,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:35:32,493 INFO L93 Difference]: Finished difference Result 438 states and 531 transitions. [2021-05-02 12:35:32,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 12:35:32,493 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0384615384615383) internal successors, (158), 51 states have internal predecessors, (158), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 289 [2021-05-02 12:35:32,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:35:32,494 INFO L225 Difference]: With dead ends: 438 [2021-05-02 12:35:32,494 INFO L226 Difference]: Without dead ends: 294 [2021-05-02 12:35:32,495 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 3004.1ms TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 12:35:32,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-02 12:35:32,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2021-05-02 12:35:32,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.1631944444444444) internal successors, (335), 288 states have internal predecessors, (335), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:32,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 339 transitions. [2021-05-02 12:35:32,563 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 339 transitions. Word has length 289 [2021-05-02 12:35:32,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:35:32,563 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 339 transitions. [2021-05-02 12:35:32,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 3.0384615384615383) internal successors, (158), 51 states have internal predecessors, (158), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:32,563 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 339 transitions. [2021-05-02 12:35:32,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-05-02 12:35:32,564 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:35:32,564 INFO L523 BasicCegarLoop]: trace histogram [94, 93, 48, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:35:32,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 12:35:32,772 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:35:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:35:32,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1670630233, now seen corresponding path program 30 times [2021-05-02 12:35:32,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:35:32,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256098906] [2021-05-02 12:35:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:35:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:34,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:35:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 6618 proven. 3480 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2021-05-02 12:35:34,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:35:34,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256098906] [2021-05-02 12:35:34,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256098906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:34,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6065945] [2021-05-02 12:35:34,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:35:34,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 92 check-sat command(s) [2021-05-02 12:35:34,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:35:34,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 12:35:34,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:35:34,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 6618 proven. 3480 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2021-05-02 12:35:34,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6065945] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:34,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:35:34,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2021-05-02 12:35:34,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534672855] [2021-05-02 12:35:34,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 12:35:34,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:35:34,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 12:35:34,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 12:35:34,611 INFO L87 Difference]: Start difference. First operand 293 states and 339 transitions. Second operand has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 52 states have internal predecessors, (161), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:37,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:35:37,023 INFO L93 Difference]: Finished difference Result 441 states and 534 transitions. [2021-05-02 12:35:37,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 12:35:37,023 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 52 states have internal predecessors, (161), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 292 [2021-05-02 12:35:37,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:35:37,025 INFO L225 Difference]: With dead ends: 441 [2021-05-02 12:35:37,025 INFO L226 Difference]: Without dead ends: 297 [2021-05-02 12:35:37,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 3227.3ms TimeCoverageRelationStatistics Valid=3877, Invalid=6425, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 12:35:37,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-02 12:35:37,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2021-05-02 12:35:37,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.161512027491409) internal successors, (338), 291 states have internal predecessors, (338), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:37,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 342 transitions. [2021-05-02 12:35:37,085 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 342 transitions. Word has length 292 [2021-05-02 12:35:37,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:35:37,085 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 342 transitions. [2021-05-02 12:35:37,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 52 states have internal predecessors, (161), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:37,086 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 342 transitions. [2021-05-02 12:35:37,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-05-02 12:35:37,087 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:35:37,087 INFO L523 BasicCegarLoop]: trace histogram [95, 94, 49, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:35:37,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:35:37,304 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:35:37,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:35:37,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1453032573, now seen corresponding path program 31 times [2021-05-02 12:35:37,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:35:37,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588177648] [2021-05-02 12:35:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:35:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:38,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:35:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 6754 proven. 3626 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2021-05-02 12:35:38,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:35:38,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588177648] [2021-05-02 12:35:38,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588177648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:38,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900894047] [2021-05-02 12:35:38,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:35:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:38,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 12:35:38,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:35:38,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:38,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 6754 proven. 3626 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2021-05-02 12:35:39,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900894047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:39,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:35:39,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2021-05-02 12:35:39,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488244581] [2021-05-02 12:35:39,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 12:35:39,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:35:39,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 12:35:39,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 12:35:39,077 INFO L87 Difference]: Start difference. First operand 296 states and 342 transitions. Second operand has 54 states, 54 states have (on average 3.037037037037037) internal successors, (164), 53 states have internal predecessors, (164), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:35:41,625 INFO L93 Difference]: Finished difference Result 487 states and 580 transitions. [2021-05-02 12:35:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 12:35:41,626 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.037037037037037) internal successors, (164), 53 states have internal predecessors, (164), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 295 [2021-05-02 12:35:41,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:35:41,627 INFO L225 Difference]: With dead ends: 487 [2021-05-02 12:35:41,627 INFO L226 Difference]: Without dead ends: 343 [2021-05-02 12:35:41,628 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 3349.5ms TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 12:35:41,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-05-02 12:35:41,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 299. [2021-05-02 12:35:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.1598639455782314) internal successors, (341), 294 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 345 transitions. [2021-05-02 12:35:41,683 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 345 transitions. Word has length 295 [2021-05-02 12:35:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:35:41,684 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 345 transitions. [2021-05-02 12:35:41,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 3.037037037037037) internal successors, (164), 53 states have internal predecessors, (164), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 345 transitions. [2021-05-02 12:35:41,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-05-02 12:35:41,685 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:35:41,685 INFO L523 BasicCegarLoop]: trace histogram [96, 95, 50, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:35:41,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 12:35:41,903 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:35:41,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:35:41,904 INFO L82 PathProgramCache]: Analyzing trace with hash -106793177, now seen corresponding path program 32 times [2021-05-02 12:35:41,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:35:41,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036655934] [2021-05-02 12:35:41,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:35:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:43,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:35:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 7361 proven. 6166 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-02 12:35:43,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:35:43,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036655934] [2021-05-02 12:35:43,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036655934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:43,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488482239] [2021-05-02 12:35:43,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:35:43,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:35:43,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:35:43,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 98 conjunts are in the unsatisfiable core [2021-05-02 12:35:43,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:35:43,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 7378 proven. 6166 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-02 12:35:43,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488482239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:43,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:35:43,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 53] total 54 [2021-05-02 12:35:43,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076969312] [2021-05-02 12:35:43,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 12:35:43,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:35:43,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 12:35:43,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 12:35:43,950 INFO L87 Difference]: Start difference. First operand 299 states and 345 transitions. Second operand has 54 states, 54 states have (on average 3.9814814814814814) internal successors, (215), 53 states have internal predecessors, (215), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:46,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:35:46,236 INFO L93 Difference]: Finished difference Result 999 states and 1279 transitions. [2021-05-02 12:35:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 12:35:46,237 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.9814814814814814) internal successors, (215), 53 states have internal predecessors, (215), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 298 [2021-05-02 12:35:46,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:35:46,247 INFO L225 Difference]: With dead ends: 999 [2021-05-02 12:35:46,247 INFO L226 Difference]: Without dead ends: 994 [2021-05-02 12:35:46,248 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 2801.9ms TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 12:35:46,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-05-02 12:35:46,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 314. [2021-05-02 12:35:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 309 states have (on average 1.168284789644013) internal successors, (361), 309 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:46,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 365 transitions. [2021-05-02 12:35:46,423 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 365 transitions. Word has length 298 [2021-05-02 12:35:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:35:46,426 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 365 transitions. [2021-05-02 12:35:46,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 3.9814814814814814) internal successors, (215), 53 states have internal predecessors, (215), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:35:46,427 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 365 transitions. [2021-05-02 12:35:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-05-02 12:35:46,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:35:46,429 INFO L523 BasicCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:35:46,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 12:35:46,645 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:35:46,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:35:46,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1966530881, now seen corresponding path program 33 times [2021-05-02 12:35:46,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:35:46,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161350932] [2021-05-02 12:35:46,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:35:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:50,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:35:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:35:50,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:35:50,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161350932] [2021-05-02 12:35:50,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161350932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:50,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484248850] [2021-05-02 12:35:50,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:35:50,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2021-05-02 12:35:50,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:35:50,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 111 conjunts are in the unsatisfiable core [2021-05-02 12:35:50,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:35:50,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:50,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:51,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:51,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:51,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:51,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:51,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:51,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:51,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:51,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:51,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:51,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:51,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:51,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:51,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:51,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 7648 proven. 3876 refuted. 0 times theorem prover too weak. 3626 trivial. 0 not checked. [2021-05-02 12:35:51,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484248850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:51,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:35:51,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 58] total 110 [2021-05-02 12:35:51,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930197225] [2021-05-02 12:35:51,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-02 12:35:51,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:35:51,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-02 12:35:51,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1495, Invalid=10495, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 12:35:51,842 INFO L87 Difference]: Start difference. First operand 314 states and 365 transitions. Second operand has 110 states, 110 states have (on average 2.890909090909091) internal successors, (318), 107 states have internal predecessors, (318), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 12:36:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:36:10,750 INFO L93 Difference]: Finished difference Result 4399 states and 5826 transitions. [2021-05-02 12:36:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-02 12:36:10,751 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.890909090909091) internal successors, (318), 107 states have internal predecessors, (318), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 313 [2021-05-02 12:36:10,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:36:10,760 INFO L225 Difference]: With dead ends: 4399 [2021-05-02 12:36:10,760 INFO L226 Difference]: Without dead ends: 4237 [2021-05-02 12:36:10,762 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 361 SyntacticMatches, 2 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8573 ImplicationChecksByTransitivity, 13075.2ms TimeCoverageRelationStatistics Valid=4680, Invalid=41330, Unknown=0, NotChecked=0, Total=46010 [2021-05-02 12:36:10,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4237 states. [2021-05-02 12:36:12,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4237 to 4188. [2021-05-02 12:36:12,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4183 states have (on average 1.0241453502271098) internal successors, (4284), 4183 states have internal predecessors, (4284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:36:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 4288 transitions. [2021-05-02 12:36:12,855 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 4288 transitions. Word has length 313 [2021-05-02 12:36:12,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:36:12,856 INFO L480 AbstractCegarLoop]: Abstraction has 4188 states and 4288 transitions. [2021-05-02 12:36:12,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.890909090909091) internal successors, (318), 107 states have internal predecessors, (318), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 12:36:12,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 4288 transitions. [2021-05-02 12:36:12,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-05-02 12:36:12,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:36:12,858 INFO L523 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:36:13,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 12:36:13,076 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:36:13,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:36:13,077 INFO L82 PathProgramCache]: Analyzing trace with hash 117058663, now seen corresponding path program 34 times [2021-05-02 12:36:13,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:36:13,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555302456] [2021-05-02 12:36:13,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:36:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:36:14,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:36:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:36:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7403 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-05-02 12:36:14,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:36:14,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555302456] [2021-05-02 12:36:14,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555302456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:36:14,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340341235] [2021-05-02 12:36:14,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:36:14,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:36:14,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:36:14,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 103 conjunts are in the unsatisfiable core [2021-05-02 12:36:14,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:36:14,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:14,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-05-02 12:36:15,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340341235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:36:15,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:36:15,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 54] total 56 [2021-05-02 12:36:15,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926954086] [2021-05-02 12:36:15,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 12:36:15,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:36:15,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 12:36:15,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1486, Invalid=1594, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 12:36:15,151 INFO L87 Difference]: Start difference. First operand 4188 states and 4288 transitions. Second operand has 56 states, 56 states have (on average 3.875) internal successors, (217), 55 states have internal predecessors, (217), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:36:20,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:36:20,068 INFO L93 Difference]: Finished difference Result 8375 states and 8576 transitions. [2021-05-02 12:36:20,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 12:36:20,068 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.875) internal successors, (217), 55 states have internal predecessors, (217), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 316 [2021-05-02 12:36:20,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:36:20,077 INFO L225 Difference]: With dead ends: 8375 [2021-05-02 12:36:20,077 INFO L226 Difference]: Without dead ends: 4191 [2021-05-02 12:36:20,081 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 3481.6ms TimeCoverageRelationStatistics Valid=4452, Invalid=7320, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 12:36:20,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2021-05-02 12:36:22,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 4191. [2021-05-02 12:36:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4191 states, 4186 states have (on average 1.0241280458671762) internal successors, (4287), 4186 states have internal predecessors, (4287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:36:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4191 states to 4191 states and 4291 transitions. [2021-05-02 12:36:22,074 INFO L78 Accepts]: Start accepts. Automaton has 4191 states and 4291 transitions. Word has length 316 [2021-05-02 12:36:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:36:22,074 INFO L480 AbstractCegarLoop]: Abstraction has 4191 states and 4291 transitions. [2021-05-02 12:36:22,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 3.875) internal successors, (217), 55 states have internal predecessors, (217), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:36:22,074 INFO L276 IsEmpty]: Start isEmpty. Operand 4191 states and 4291 transitions. [2021-05-02 12:36:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-05-02 12:36:22,076 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:36:22,076 INFO L523 BasicCegarLoop]: trace histogram [103, 102, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:36:22,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 12:36:22,296 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:36:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:36:22,296 INFO L82 PathProgramCache]: Analyzing trace with hash 2055380803, now seen corresponding path program 35 times [2021-05-02 12:36:22,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:36:22,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084931397] [2021-05-02 12:36:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:36:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:36:23,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:36:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:36:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 15759 backedges. 11580 proven. 149 refuted. 0 times theorem prover too weak. 4030 trivial. 0 not checked. [2021-05-02 12:36:23,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:36:23,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084931397] [2021-05-02 12:36:23,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084931397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:36:23,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305999441] [2021-05-02 12:36:23,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:36:23,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) [2021-05-02 12:36:23,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:36:23,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 12:36:23,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:36:23,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:23,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:36:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 15759 backedges. 11729 proven. 0 refuted. 0 times theorem prover too weak. 4030 trivial. 0 not checked. [2021-05-02 12:36:24,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305999441] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:36:24,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:36:24,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [54] total 55 [2021-05-02 12:36:24,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630849566] [2021-05-02 12:36:24,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 12:36:24,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:36:24,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 12:36:24,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 12:36:24,325 INFO L87 Difference]: Start difference. First operand 4191 states and 4291 transitions. Second operand has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:36:24,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:36:24,477 INFO L93 Difference]: Finished difference Result 4191 states and 4291 transitions. [2021-05-02 12:36:24,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 12:36:24,478 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 319 [2021-05-02 12:36:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:36:24,478 INFO L225 Difference]: With dead ends: 4191 [2021-05-02 12:36:24,478 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 12:36:24,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1332.9ms TimeCoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 12:36:24,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 12:36:24,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 12:36:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 12:36:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 12:36:24,483 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 319 [2021-05-02 12:36:24,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:36:24,483 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 12:36:24,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:36:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 12:36:24,483 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 12:36:24,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 12:36:24,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 12:36:46,610 WARN L205 SmtUtils]: Spent 21.89 s on a formula simplification. DAG size of input: 1880 DAG size of output: 1630 [2021-05-02 12:37:08,423 WARN L205 SmtUtils]: Spent 21.72 s on a formula simplification. DAG size of input: 1617 DAG size of output: 516 [2021-05-02 12:37:08,428 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-02 12:37:08,428 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-02 12:37:08,428 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-02 12:37:08,428 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:37:08,428 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-05-02 12:37:08,428 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:37:08,428 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:37:08,429 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (exists ((|#t~string0.base| Int) (|#t~string0.offset| Int)) (= (select (select |#memory_int| |#t~string0.base|) (+ |#t~string0.offset| 1)) 0)) [2021-05-02 12:37:08,429 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 12:37:08,429 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:37:08,429 INFO L198 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-05-02 12:37:08,429 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:37:08,429 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:37:08,429 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:37:08,429 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 24 39) the Hoare annotation is: true [2021-05-02 12:37:08,429 INFO L198 CegarLoopUtils]: For program point L29(lines 29 33) no Hoare annotation was computed. [2021-05-02 12:37:08,429 INFO L198 CegarLoopUtils]: For program point L29-2(lines 28 36) no Hoare annotation was computed. [2021-05-02 12:37:08,430 INFO L194 CegarLoopUtils]: At program point L28-2(lines 28 36) the Hoare annotation is: (let ((.cse10 (<= 26 main_~y~0)) (.cse11 (<= main_~y~0 26)) (.cse35 (<= 1 main_~y~0)) (.cse36 (<= main_~y~0 1)) (.cse4 (<= 23 main_~y~0)) (.cse5 (<= main_~y~0 23)) (.cse2 (<= 11 main_~y~0)) (.cse3 (<= main_~y~0 11)) (.cse16 (<= main_~y~0 44)) (.cse17 (<= 44 main_~y~0)) (.cse22 (<= main_~y~0 19)) (.cse23 (<= 19 main_~y~0)) (.cse53 (<= 25 main_~y~0)) (.cse54 (<= main_~y~0 25)) (.cse33 (<= main_~y~0 27)) (.cse34 (<= 27 main_~y~0)) (.cse18 (<= 28 main_~y~0)) (.cse19 (<= main_~y~0 28)) (.cse45 (<= main_~y~0 20)) (.cse46 (<= 20 main_~y~0)) (.cse49 (<= 16 main_~y~0)) (.cse50 (<= main_~y~0 16)) (.cse26 (= main_~y~0 0)) (.cse43 (<= main_~y~0 22)) (.cse44 (<= 22 main_~y~0)) (.cse0 (<= main_~y~0 33)) (.cse1 (<= 33 main_~y~0)) (.cse24 (<= main_~y~0 10)) (.cse25 (<= 10 main_~y~0)) (.cse59 (<= 35 main_~y~0)) (.cse60 (<= main_~y~0 35)) (.cse57 (<= main_~y~0 3)) (.cse58 (<= 3 main_~y~0)) (.cse69 (<= 7 main_~y~0)) (.cse70 (<= main_~y~0 7)) (.cse29 (<= 38 main_~y~0)) (.cse30 (<= main_~y~0 38)) (.cse8 (<= main_~y~0 39)) (.cse9 (<= 39 main_~y~0)) (.cse27 (<= main_~y~0 48)) (.cse28 (<= 48 main_~y~0)) (.cse14 (<= 36 main_~y~0)) (.cse15 (<= main_~y~0 36)) (.cse32 (<= main_~y~0 45)) (.cse31 (<= 45 main_~y~0)) (.cse47 (<= 32 main_~y~0)) (.cse48 (<= main_~y~0 32)) (.cse61 (<= 42 main_~y~0)) (.cse62 (<= main_~y~0 42)) (.cse41 (<= main_~y~0 24)) (.cse42 (<= 24 main_~y~0)) (.cse83 (<= 5 main_~y~0)) (.cse84 (<= main_~y~0 5)) (.cse75 (<= main_~y~0 34)) (.cse76 (<= 34 main_~y~0)) (.cse91 (<= 9 main_~y~0)) (.cse92 (<= main_~y~0 9)) (.cse73 (<= main_~y~0 15)) (.cse74 (<= 15 main_~y~0)) (.cse39 (<= main_~y~0 31)) (.cse40 (<= 31 main_~y~0)) (.cse89 (<= 13 main_~y~0)) (.cse90 (<= main_~y~0 13)) (.cse71 (<= 14 main_~y~0)) (.cse72 (<= main_~y~0 14)) (.cse81 (<= main_~y~0 6)) (.cse82 (<= 6 main_~y~0)) (.cse20 (<= 49 main_~y~0)) (.cse21 (<= main_~y~0 49)) (.cse67 (<= 17 main_~y~0)) (.cse68 (<= main_~y~0 17)) (.cse65 (<= 2 main_~y~0)) (.cse66 (<= main_~y~0 2)) (.cse85 (<= 43 main_~y~0)) (.cse86 (<= main_~y~0 43)) (.cse55 (<= 40 main_~y~0)) (.cse56 (<= main_~y~0 40)) (.cse87 (<= 8 main_~y~0)) (.cse88 (<= main_~y~0 8)) (.cse79 (<= 29 main_~y~0)) (.cse80 (<= main_~y~0 29)) (.cse95 (<= 41 main_~y~0)) (.cse96 (<= main_~y~0 41)) (.cse93 (<= main_~y~0 37)) (.cse94 (<= 37 main_~y~0)) (.cse51 (<= main_~y~0 18)) (.cse52 (<= 18 main_~y~0)) (.cse77 (<= main_~y~0 12)) (.cse78 (<= 12 main_~y~0)) (.cse12 (<= main_~y~0 4)) (.cse13 (<= 4 main_~y~0)) (.cse6 (<= main_~y~0 46)) (.cse7 (<= 46 main_~y~0)) (.cse97 (<= 47 main_~y~0)) (.cse98 (<= main_~y~0 47)) (.cse63 (<= main_~y~0 21)) (.cse64 (<= 21 main_~y~0)) (.cse37 (<= 30 main_~y~0)) (.cse38 (<= main_~y~0 30))) (or (and .cse0 .cse1 (<= main_~x~0 67) (<= 67 main_~x~0)) (and .cse2 .cse3 (<= 89 main_~x~0) (<= main_~x~0 89)) (and (<= main_~x~0 23) .cse4 (<= 23 main_~x~0) .cse5) (and .cse6 (<= 54 main_~x~0) .cse7 (<= main_~x~0 54)) (and (<= main_~x~0 61) .cse8 .cse9 (<= 61 main_~x~0)) (and (<= main_~x~0 74) .cse10 (<= 74 main_~x~0) .cse11) (and .cse12 (<= 4 main_~x~0) .cse13 (<= main_~x~0 4)) (and (<= main_~x~0 36) (<= 36 main_~x~0) .cse14 .cse15) (and .cse16 .cse17 (<= 56 main_~x~0) (<= main_~x~0 56)) (and .cse18 (<= main_~x~0 28) (<= 28 main_~x~0) .cse19) (and .cse20 (<= main_~x~0 49) .cse21 (<= 49 main_~x~0)) (and (<= main_~x~0 81) .cse22 .cse23 (<= 81 main_~x~0)) (and .cse24 (<= 10 main_~x~0) (<= main_~x~0 10) .cse25) (and .cse26 (= main_~x~0 0)) (and .cse27 .cse28 (<= 48 main_~x~0) (<= main_~x~0 48)) (and (<= 38 main_~x~0) (<= main_~x~0 38) .cse29 .cse30) (and .cse31 .cse32 (<= 45 main_~x~0) (<= main_~x~0 45)) (and (<= 73 main_~x~0) .cse33 (<= main_~x~0 73) .cse34) (and (<= 1 main_~x~0) .cse35 (<= main_~x~0 1) .cse36) (and (<= main_~x~0 26) .cse10 (<= 26 main_~x~0) .cse11) (and .cse37 (<= main_~x~0 30) .cse38 (<= 30 main_~x~0)) (and .cse35 (<= main_~x~0 99) (<= 99 main_~x~0) .cse36) (and (<= 31 main_~x~0) .cse39 .cse40 (<= main_~x~0 31)) (and (<= 76 main_~x~0) .cse41 .cse42 (<= main_~x~0 76)) (and (<= main_~x~0 22) (<= 22 main_~x~0) .cse43 .cse44) (and .cse45 (<= 80 main_~x~0) .cse46 (<= main_~x~0 80)) (and (<= 68 main_~x~0) .cse47 .cse48 (<= main_~x~0 68)) (and (<= main_~x~0 77) .cse4 (<= 77 main_~x~0) .cse5) (and .cse2 (<= main_~x~0 11) .cse3 (<= 11 main_~x~0)) (and .cse49 .cse50 (<= 16 main_~x~0) (<= main_~x~0 16)) (and (<= 18 main_~x~0) .cse51 .cse52 (<= main_~x~0 18)) (and (<= main_~x~0 50) (<= 50 main_~y~0) (<= 50 main_~x~0) (<= main_~y~0 50)) (and (<= main_~x~0 44) .cse16 .cse17 (<= 44 main_~x~0)) (and (<= 25 main_~x~0) .cse53 (<= main_~x~0 25) .cse54) (forall ((.unlet.14 Int) (.unlet.15 Int)) (not (= (select (select |#memory_int| .unlet.14) (+ .unlet.15 1)) 0))) (and (<= 19 main_~x~0) .cse22 (<= main_~x~0 19) .cse23) (and (<= 40 main_~x~0) .cse55 (<= main_~x~0 40) .cse56) (and (<= main_~x~0 97) .cse57 .cse58 (<= 97 main_~x~0)) (and .cse59 (<= 65 main_~x~0) .cse60 (<= main_~x~0 65)) (and (<= 75 main_~x~0) .cse53 .cse54 (<= main_~x~0 75)) (and (<= main_~x~0 27) .cse33 .cse34 (<= 27 main_~x~0)) (and (<= main_~x~0 72) .cse18 (<= 72 main_~x~0) .cse19) (and (<= main_~x~0 20) .cse45 (<= 20 main_~x~0) .cse46) (and .cse49 .cse50 (<= 84 main_~x~0) (<= main_~x~0 84)) (and .cse61 (<= 58 main_~x~0) .cse62 (<= main_~x~0 58)) (and .cse26 (< 99 main_~x~0) (<= main_~x~0 100)) (and (<= 78 main_~x~0) (<= main_~x~0 78) .cse43 .cse44) (and (<= main_~x~0 79) .cse63 .cse64 (<= 79 main_~x~0)) (and (<= 2 main_~x~0) (<= main_~x~0 2) .cse65 .cse66) (and (<= main_~x~0 17) .cse67 .cse68 (<= 17 main_~x~0)) (and .cse0 .cse1 (<= main_~x~0 33) (<= 33 main_~x~0)) (and .cse24 (<= main_~x~0 90) (<= 90 main_~x~0) .cse25) (and (<= main_~x~0 35) (<= 35 main_~x~0) .cse59 .cse60) (and (<= main_~x~0 93) .cse69 .cse70 (<= 93 main_~x~0)) (and .cse57 (<= main_~x~0 3) (<= 3 main_~x~0) .cse58) (and .cse71 (<= 86 main_~x~0) (<= main_~x~0 86) .cse72) (and .cse73 .cse74 (<= main_~x~0 85) (<= 85 main_~x~0)) (and .cse75 (<= main_~x~0 34) .cse76 (<= 34 main_~x~0)) (and (<= 7 main_~x~0) (<= main_~x~0 7) .cse69 .cse70) (and (<= main_~x~0 62) (<= 62 main_~x~0) .cse29 .cse30) (and (<= 39 main_~x~0) .cse8 (<= main_~x~0 39) .cse9) (and (<= 52 main_~x~0) .cse27 (<= main_~x~0 52) .cse28) (and .cse14 (<= 64 main_~x~0) (<= main_~x~0 64) .cse15) (and (<= 55 main_~x~0) (<= main_~x~0 55) .cse32 .cse31) (and (<= 32 main_~x~0) (<= main_~x~0 32) .cse47 .cse48) (and (<= 42 main_~x~0) .cse61 .cse62 (<= main_~x~0 42)) (and (<= 12 main_~x~0) (<= main_~x~0 12) .cse77 .cse78) (and (<= 71 main_~x~0) (<= main_~x~0 71) .cse79 .cse80) (and .cse81 (<= 6 main_~x~0) (<= main_~x~0 6) .cse82) (and .cse83 .cse84 (<= 95 main_~x~0) (<= main_~x~0 95)) (and .cse41 (<= 24 main_~x~0) (<= main_~x~0 24) .cse42) (and .cse85 (<= 57 main_~x~0) .cse86 (<= main_~x~0 57)) (and (<= 8 main_~x~0) .cse87 (<= main_~x~0 8) .cse88) (and .cse89 .cse90 (<= 13 main_~x~0) (<= main_~x~0 13)) (and .cse83 (<= main_~x~0 5) .cse84 (<= 5 main_~x~0)) (and .cse91 (<= 91 main_~x~0) (<= main_~x~0 91) .cse92) (and .cse75 .cse76 (<= 66 main_~x~0) (<= main_~x~0 66)) (and (<= main_~x~0 9) (<= 9 main_~x~0) .cse91 .cse92) (and (<= 15 main_~x~0) .cse73 .cse74 (<= main_~x~0 15)) (and .cse39 .cse40 (<= 69 main_~x~0) (<= main_~x~0 69)) (and .cse89 .cse90 (<= 87 main_~x~0) (<= main_~x~0 87)) (and .cse71 (<= 14 main_~x~0) (<= main_~x~0 14) .cse72) (and .cse93 .cse94 (<= 37 main_~x~0) (<= main_~x~0 37)) (and .cse81 (<= main_~x~0 94) (<= 94 main_~x~0) .cse82) (and (<= main_~x~0 51) .cse20 (<= 51 main_~x~0) .cse21) (and .cse67 (<= main_~x~0 83) (<= 83 main_~x~0) .cse68) (and (<= 98 main_~x~0) .cse65 .cse66 (<= main_~x~0 98)) (and .cse85 .cse86 (<= 43 main_~x~0) (<= main_~x~0 43)) (and (<= 60 main_~x~0) .cse55 .cse56 (<= main_~x~0 60)) (and (<= main_~x~0 59) (<= 59 main_~x~0) .cse95 .cse96) (and .cse87 .cse88 (<= 92 main_~x~0) (<= main_~x~0 92)) (and (<= 29 main_~x~0) .cse79 .cse80 (<= main_~x~0 29)) (and (<= 41 main_~x~0) .cse95 (<= main_~x~0 41) .cse96) (and .cse93 (<= main_~x~0 63) .cse94 (<= 63 main_~x~0)) (and (<= main_~x~0 82) (<= 82 main_~x~0) .cse51 .cse52) (and (<= main_~x~0 88) .cse77 .cse78 (<= 88 main_~x~0)) (and .cse12 (<= 96 main_~x~0) .cse13 (<= main_~x~0 96)) (and (<= main_~x~0 46) .cse6 .cse7 (<= 46 main_~x~0)) (and (<= main_~x~0 47) .cse97 .cse98 (<= 47 main_~x~0)) (and .cse97 .cse98 (<= 53 main_~x~0) (<= main_~x~0 53)) (and (<= main_~x~0 21) (<= 21 main_~x~0) .cse63 .cse64) (and .cse37 (<= 70 main_~x~0) .cse38 (<= main_~x~0 70)))) [2021-05-02 12:37:08,430 INFO L194 CegarLoopUtils]: At program point L28-3(lines 28 36) the Hoare annotation is: (or (forall ((.unlet.8 Int) (.unlet.9 Int)) (not (= (select (select |#memory_int| .unlet.8) (+ .unlet.9 1)) 0))) (and (< 99 main_~x~0) (<= main_~x~0 100))) [2021-05-02 12:37:08,430 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 24 39) no Hoare annotation was computed. [2021-05-02 12:37:08,430 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 24 39) no Hoare annotation was computed. [2021-05-02 12:37:08,430 INFO L198 CegarLoopUtils]: For program point L37(line 37) no Hoare annotation was computed. [2021-05-02 12:37:08,430 INFO L198 CegarLoopUtils]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:37:08,430 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-05-02 12:37:08,430 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:37:08,431 INFO L198 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2021-05-02 12:37:08,431 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-05-02 12:37:08,431 INFO L198 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-05-02 12:37:08,444 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[.unlet.14,QUANTIFIED] [2021-05-02 12:37:08,445 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[.unlet.15,QUANTIFIED] [2021-05-02 12:37:08,455 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[.unlet.14,QUANTIFIED] [2021-05-02 12:37:08,455 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[.unlet.15,QUANTIFIED] [2021-05-02 12:37:08,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 12:37:08 BoogieIcfgContainer [2021-05-02 12:37:08,459 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 12:37:08,460 INFO L168 Benchmark]: Toolchain (without parser) took 162221.50 ms. Allocated memory was 178.3 MB in the beginning and 4.0 GB in the end (delta: 3.8 GB). Free memory was 142.7 MB in the beginning and 2.7 GB in the end (delta: -2.5 GB). Peak memory consumption was 1.4 GB. Max. memory is 8.0 GB. [2021-05-02 12:37:08,460 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 178.3 MB. Free memory was 159.4 MB in the beginning and 159.2 MB in the end (delta: 139.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 12:37:08,460 INFO L168 Benchmark]: CACSL2BoogieTranslator took 194.05 ms. Allocated memory is still 178.3 MB. Free memory was 142.6 MB in the beginning and 133.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 12:37:08,460 INFO L168 Benchmark]: Boogie Preprocessor took 81.87 ms. Allocated memory is still 178.3 MB. Free memory was 133.0 MB in the beginning and 161.1 MB in the end (delta: -28.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-02 12:37:08,460 INFO L168 Benchmark]: RCFGBuilder took 399.05 ms. Allocated memory is still 178.3 MB. Free memory was 161.1 MB in the beginning and 146.2 MB in the end (delta: 14.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 12:37:08,460 INFO L168 Benchmark]: TraceAbstraction took 161538.52 ms. Allocated memory was 178.3 MB in the beginning and 4.0 GB in the end (delta: 3.8 GB). Free memory was 145.7 MB in the beginning and 2.7 GB in the end (delta: -2.5 GB). Peak memory consumption was 1.4 GB. Max. memory is 8.0 GB. [2021-05-02 12:37:08,460 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 178.3 MB. Free memory was 159.4 MB in the beginning and 159.2 MB in the end (delta: 139.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 194.05 ms. Allocated memory is still 178.3 MB. Free memory was 142.6 MB in the beginning and 133.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 81.87 ms. Allocated memory is still 178.3 MB. Free memory was 133.0 MB in the beginning and 161.1 MB in the end (delta: -28.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 399.05 ms. Allocated memory is still 178.3 MB. Free memory was 161.1 MB in the beginning and 146.2 MB in the end (delta: 14.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 161538.52 ms. Allocated memory was 178.3 MB in the beginning and 4.0 GB in the end (delta: 3.8 GB). Free memory was 145.7 MB in the beginning and 2.7 GB in the end (delta: -2.5 GB). Peak memory consumption was 1.4 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[.unlet.14,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[.unlet.15,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[.unlet.14,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[.unlet.15,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 117697.8ms, OverallIterations: 38, TraceHistogramMax: 103, EmptinessCheckTime: 42.0ms, AutomataDifference: 67516.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 43726.9ms, InitialAbstractionConstructionTime: 19.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 823 SDtfs, 3182 SDslu, 7816 SDs, 0 SdLazy, 33247 SolverSat, 2826 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12303.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7552 GetRequests, 5197 SyntacticMatches, 2 SemanticMatches, 2353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53324 ImplicationChecksByTransitivity, 68524.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4191occurred in iteration=37, InterpolantAutomatonStates: 1348, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4819.0ms AutomataMinimizationTime, 38 MinimizatonAttempts, 3279 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 7 LocationsWithAnnotation, 45 PreInvPairs, 147 NumberOfFragments, 1373 HoareAnnotationTreeSize, 45 FomulaSimplifications, 271350515 FormulaSimplificationTreeSizeReduction, 21917.9ms HoareSimplificationTime, 7 FomulaSimplificationsInter, 15134217 FormulaSimplificationTreeSizeReductionInter, 21785.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 644.6ms SsaConstructionTime, 2492.3ms SatisfiabilityAnalysisTime, 32974.4ms InterpolantComputationTime, 10157 NumberOfCodeBlocks, 10064 NumberOfCodeBlocksAsserted, 829 NumberOfCheckSat, 10084 ConstructedInterpolants, 2 QuantifiedInterpolants, 24778 SizeOfPredicates, 4 NumberOfNonLiveVariables, 13223 ConjunctsInSsa, 1175 ConjunctsInUnsatCore, 73 InterpolantComputations, 4 PerfectInterpolantSequences, 219036/332046 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant [2021-05-02 12:37:08,462 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[.unlet.14,QUANTIFIED] [2021-05-02 12:37:08,462 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[.unlet.15,QUANTIFIED] [2021-05-02 12:37:08,465 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[.unlet.14,QUANTIFIED] [2021-05-02 12:37:08,465 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[.unlet.15,QUANTIFIED] Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((y <= 33 && 33 <= y) && x <= 67) && 67 <= x) || (((11 <= y && y <= 11) && 89 <= x) && x <= 89)) || (((x <= 23 && 23 <= y) && 23 <= x) && y <= 23)) || (((y <= 46 && 54 <= x) && 46 <= y) && x <= 54)) || (((x <= 61 && y <= 39) && 39 <= y) && 61 <= x)) || (((x <= 74 && 26 <= y) && 74 <= x) && y <= 26)) || (((y <= 4 && 4 <= x) && 4 <= y) && x <= 4)) || (((x <= 36 && 36 <= x) && 36 <= y) && y <= 36)) || (((y <= 44 && 44 <= y) && 56 <= x) && x <= 56)) || (((28 <= y && x <= 28) && 28 <= x) && y <= 28)) || (((49 <= y && x <= 49) && y <= 49) && 49 <= x)) || (((x <= 81 && y <= 19) && 19 <= y) && 81 <= x)) || (((y <= 10 && 10 <= x) && x <= 10) && 10 <= y)) || (y == 0 && x == 0)) || (((y <= 48 && 48 <= y) && 48 <= x) && x <= 48)) || (((38 <= x && x <= 38) && 38 <= y) && y <= 38)) || (((45 <= y && y <= 45) && 45 <= x) && x <= 45)) || (((73 <= x && y <= 27) && x <= 73) && 27 <= y)) || (((1 <= x && 1 <= y) && x <= 1) && y <= 1)) || (((x <= 26 && 26 <= y) && 26 <= x) && y <= 26)) || (((30 <= y && x <= 30) && y <= 30) && 30 <= x)) || (((1 <= y && x <= 99) && 99 <= x) && y <= 1)) || (((31 <= x && y <= 31) && 31 <= y) && x <= 31)) || (((76 <= x && y <= 24) && 24 <= y) && x <= 76)) || (((x <= 22 && 22 <= x) && y <= 22) && 22 <= y)) || (((y <= 20 && 80 <= x) && 20 <= y) && x <= 80)) || (((68 <= x && 32 <= y) && y <= 32) && x <= 68)) || (((x <= 77 && 23 <= y) && 77 <= x) && y <= 23)) || (((11 <= y && x <= 11) && y <= 11) && 11 <= x)) || (((16 <= y && y <= 16) && 16 <= x) && x <= 16)) || (((18 <= x && y <= 18) && 18 <= y) && x <= 18)) || (((x <= 50 && 50 <= y) && 50 <= x) && y <= 50)) || (((x <= 44 && y <= 44) && 44 <= y) && 44 <= x)) || (((25 <= x && 25 <= y) && x <= 25) && y <= 25)) || (forall .unlet.14 : int, .unlet.15 : int :: !(unknown-#memory_int-unknown[.unlet.14][.unlet.15 + 1] == 0))) || (((19 <= x && y <= 19) && x <= 19) && 19 <= y)) || (((40 <= x && 40 <= y) && x <= 40) && y <= 40)) || (((x <= 97 && y <= 3) && 3 <= y) && 97 <= x)) || (((35 <= y && 65 <= x) && y <= 35) && x <= 65)) || (((75 <= x && 25 <= y) && y <= 25) && x <= 75)) || (((x <= 27 && y <= 27) && 27 <= y) && 27 <= x)) || (((x <= 72 && 28 <= y) && 72 <= x) && y <= 28)) || (((x <= 20 && y <= 20) && 20 <= x) && 20 <= y)) || (((16 <= y && y <= 16) && 84 <= x) && x <= 84)) || (((42 <= y && 58 <= x) && y <= 42) && x <= 58)) || ((y == 0 && 99 < x) && x <= 100)) || (((78 <= x && x <= 78) && y <= 22) && 22 <= y)) || (((x <= 79 && y <= 21) && 21 <= y) && 79 <= x)) || (((2 <= x && x <= 2) && 2 <= y) && y <= 2)) || (((x <= 17 && 17 <= y) && y <= 17) && 17 <= x)) || (((y <= 33 && 33 <= y) && x <= 33) && 33 <= x)) || (((y <= 10 && x <= 90) && 90 <= x) && 10 <= y)) || (((x <= 35 && 35 <= x) && 35 <= y) && y <= 35)) || (((x <= 93 && 7 <= y) && y <= 7) && 93 <= x)) || (((y <= 3 && x <= 3) && 3 <= x) && 3 <= y)) || (((14 <= y && 86 <= x) && x <= 86) && y <= 14)) || (((y <= 15 && 15 <= y) && x <= 85) && 85 <= x)) || (((y <= 34 && x <= 34) && 34 <= y) && 34 <= x)) || (((7 <= x && x <= 7) && 7 <= y) && y <= 7)) || (((x <= 62 && 62 <= x) && 38 <= y) && y <= 38)) || (((39 <= x && y <= 39) && x <= 39) && 39 <= y)) || (((52 <= x && y <= 48) && x <= 52) && 48 <= y)) || (((36 <= y && 64 <= x) && x <= 64) && y <= 36)) || (((55 <= x && x <= 55) && y <= 45) && 45 <= y)) || (((32 <= x && x <= 32) && 32 <= y) && y <= 32)) || (((42 <= x && 42 <= y) && y <= 42) && x <= 42)) || (((12 <= x && x <= 12) && y <= 12) && 12 <= y)) || (((71 <= x && x <= 71) && 29 <= y) && y <= 29)) || (((y <= 6 && 6 <= x) && x <= 6) && 6 <= y)) || (((5 <= y && y <= 5) && 95 <= x) && x <= 95)) || (((y <= 24 && 24 <= x) && x <= 24) && 24 <= y)) || (((43 <= y && 57 <= x) && y <= 43) && x <= 57)) || (((8 <= x && 8 <= y) && x <= 8) && y <= 8)) || (((13 <= y && y <= 13) && 13 <= x) && x <= 13)) || (((5 <= y && x <= 5) && y <= 5) && 5 <= x)) || (((9 <= y && 91 <= x) && x <= 91) && y <= 9)) || (((y <= 34 && 34 <= y) && 66 <= x) && x <= 66)) || (((x <= 9 && 9 <= x) && 9 <= y) && y <= 9)) || (((15 <= x && y <= 15) && 15 <= y) && x <= 15)) || (((y <= 31 && 31 <= y) && 69 <= x) && x <= 69)) || (((13 <= y && y <= 13) && 87 <= x) && x <= 87)) || (((14 <= y && 14 <= x) && x <= 14) && y <= 14)) || (((y <= 37 && 37 <= y) && 37 <= x) && x <= 37)) || (((y <= 6 && x <= 94) && 94 <= x) && 6 <= y)) || (((x <= 51 && 49 <= y) && 51 <= x) && y <= 49)) || (((17 <= y && x <= 83) && 83 <= x) && y <= 17)) || (((98 <= x && 2 <= y) && y <= 2) && x <= 98)) || (((43 <= y && y <= 43) && 43 <= x) && x <= 43)) || (((60 <= x && 40 <= y) && y <= 40) && x <= 60)) || (((x <= 59 && 59 <= x) && 41 <= y) && y <= 41)) || (((8 <= y && y <= 8) && 92 <= x) && x <= 92)) || (((29 <= x && 29 <= y) && y <= 29) && x <= 29)) || (((41 <= x && 41 <= y) && x <= 41) && y <= 41)) || (((y <= 37 && x <= 63) && 37 <= y) && 63 <= x)) || (((x <= 82 && 82 <= x) && y <= 18) && 18 <= y)) || (((x <= 88 && y <= 12) && 12 <= y) && 88 <= x)) || (((y <= 4 && 96 <= x) && 4 <= y) && x <= 96)) || (((x <= 46 && y <= 46) && 46 <= y) && 46 <= x)) || (((x <= 47 && 47 <= y) && y <= 47) && 47 <= x)) || (((47 <= y && y <= 47) && 53 <= x) && x <= 53)) || (((x <= 21 && 21 <= x) && y <= 21) && 21 <= y)) || (((30 <= y && 70 <= x) && y <= 30) && x <= 70) RESULT: Ultimate proved your program to be correct! Received shutdown request...