/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:45:59,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:45:59,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:45:59,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:45:59,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:45:59,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:45:59,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:45:59,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:45:59,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:45:59,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:45:59,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:45:59,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:45:59,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:45:59,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:45:59,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:45:59,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:45:59,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:45:59,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:45:59,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:45:59,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:45:59,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:45:59,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:45:59,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:45:59,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:45:59,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 17:45:59,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:45:59,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:45:59,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:45:59,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 17:45:59,540 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:45:59,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:45:59,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:45:59,543 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:45:59,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:45:59,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:45:59,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:45:59,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:45:59,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:45:59,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:45:59,546 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:45:59,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:45:59,546 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:45:59,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:45:59,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:45:59,547 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:45:59,548 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:45:59,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:45:59,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:45:59,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:45:59,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:45:59,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:45:59,549 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:45:59,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:46:00,004 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:46:00,009 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:46:00,011 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:46:00,011 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:46:00,013 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-04 17:46:00,108 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/557292fe0/cdd48883ab7f475b896c93edd181acac/FLAGdf6cde066 [2020-09-04 17:46:00,690 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:46:00,691 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-04 17:46:00,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/557292fe0/cdd48883ab7f475b896c93edd181acac/FLAGdf6cde066 [2020-09-04 17:46:00,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/557292fe0/cdd48883ab7f475b896c93edd181acac [2020-09-04 17:46:01,011 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:46:01,014 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:46:01,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:46:01,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:46:01,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:46:01,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:46:00" (1/1) ... [2020-09-04 17:46:01,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22589b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:01, skipping insertion in model container [2020-09-04 17:46:01,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:46:00" (1/1) ... [2020-09-04 17:46:01,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:46:01,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:46:01,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:46:01,361 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:46:01,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:46:01,518 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:46:01,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:01 WrapperNode [2020-09-04 17:46:01,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:46:01,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:46:01,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:46:01,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:46:01,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:01" (1/1) ... [2020-09-04 17:46:01,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:01" (1/1) ... [2020-09-04 17:46:01,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:01" (1/1) ... [2020-09-04 17:46:01,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:01" (1/1) ... [2020-09-04 17:46:01,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:01" (1/1) ... [2020-09-04 17:46:01,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:01" (1/1) ... [2020-09-04 17:46:01,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:01" (1/1) ... [2020-09-04 17:46:01,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:46:01,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:46:01,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:46:01,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:46:01,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:46:01,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:46:01,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:46:01,659 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:46:01,659 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-09-04 17:46:01,659 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-09-04 17:46:01,659 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:46:01,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:46:01,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:46:01,660 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-09-04 17:46:01,660 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-09-04 17:46:01,660 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-09-04 17:46:01,660 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-09-04 17:46:01,661 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-09-04 17:46:01,661 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-09-04 17:46:01,661 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-09-04 17:46:01,661 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-09-04 17:46:01,661 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-09-04 17:46:01,662 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-09-04 17:46:01,662 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-09-04 17:46:01,662 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-09-04 17:46:01,662 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-09-04 17:46:01,663 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-09-04 17:46:01,663 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-09-04 17:46:01,663 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-09-04 17:46:01,663 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-09-04 17:46:01,663 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-09-04 17:46:01,664 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-09-04 17:46:01,664 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-09-04 17:46:01,664 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-09-04 17:46:01,664 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-09-04 17:46:01,664 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-09-04 17:46:01,664 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-09-04 17:46:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-09-04 17:46:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-09-04 17:46:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 17:46:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 17:46:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 17:46:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 17:46:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:46:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:46:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:46:02,168 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:46:02,168 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 17:46:02,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:46:02 BoogieIcfgContainer [2020-09-04 17:46:02,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:46:02,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:46:02,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:46:02,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:46:02,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:46:00" (1/3) ... [2020-09-04 17:46:02,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d4473c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:46:02, skipping insertion in model container [2020-09-04 17:46:02,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:01" (2/3) ... [2020-09-04 17:46:02,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d4473c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:46:02, skipping insertion in model container [2020-09-04 17:46:02,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:46:02" (3/3) ... [2020-09-04 17:46:02,190 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-04 17:46:02,202 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:46:02,214 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:46:02,237 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:46:02,266 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:46:02,267 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:46:02,267 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:46:02,267 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:46:02,267 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:46:02,267 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:46:02,267 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:46:02,268 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:46:02,287 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2020-09-04 17:46:02,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-04 17:46:02,302 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:02,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:02,304 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:02,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:02,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2116113079, now seen corresponding path program 1 times [2020-09-04 17:46:02,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:02,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103025545] [2020-09-04 17:46:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:02,401 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:02,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:02,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-04 17:46:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:02,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103025545] [2020-09-04 17:46:02,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:02,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 17:46:02,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055233773] [2020-09-04 17:46:02,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 17:46:02,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:02,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 17:46:02,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 17:46:02,687 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 3 states. [2020-09-04 17:46:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:03,098 INFO L93 Difference]: Finished difference Result 227 states and 257 transitions. [2020-09-04 17:46:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 17:46:03,100 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-09-04 17:46:03,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:03,114 INFO L225 Difference]: With dead ends: 227 [2020-09-04 17:46:03,114 INFO L226 Difference]: Without dead ends: 102 [2020-09-04 17:46:03,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 17:46:03,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-04 17:46:03,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-09-04 17:46:03,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-04 17:46:03,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-09-04 17:46:03,183 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 48 [2020-09-04 17:46:03,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:03,184 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-09-04 17:46:03,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 17:46:03,184 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-09-04 17:46:03,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-04 17:46:03,188 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:03,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:03,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:46:03,189 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:03,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:03,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1227098254, now seen corresponding path program 1 times [2020-09-04 17:46:03,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:03,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14985158] [2020-09-04 17:46:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:03,207 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:03,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:03,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-04 17:46:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:03,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14985158] [2020-09-04 17:46:03,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:03,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 17:46:03,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354130851] [2020-09-04 17:46:03,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 17:46:03,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:03,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 17:46:03,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 17:46:03,320 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 4 states. [2020-09-04 17:46:03,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:03,545 INFO L93 Difference]: Finished difference Result 189 states and 208 transitions. [2020-09-04 17:46:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 17:46:03,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-09-04 17:46:03,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:03,548 INFO L225 Difference]: With dead ends: 189 [2020-09-04 17:46:03,548 INFO L226 Difference]: Without dead ends: 103 [2020-09-04 17:46:03,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 17:46:03,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-04 17:46:03,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-09-04 17:46:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-04 17:46:03,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2020-09-04 17:46:03,567 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 60 [2020-09-04 17:46:03,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:03,568 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2020-09-04 17:46:03,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 17:46:03,568 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2020-09-04 17:46:03,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-04 17:46:03,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:03,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:03,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:46:03,571 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:03,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:03,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1578191403, now seen corresponding path program 1 times [2020-09-04 17:46:03,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:03,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103310198] [2020-09-04 17:46:03,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:03,575 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:03,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:03,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-04 17:46:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:03,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103310198] [2020-09-04 17:46:03,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:03,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 17:46:03,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206723573] [2020-09-04 17:46:03,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 17:46:03,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:03,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 17:46:03,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-04 17:46:03,830 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand 8 states. [2020-09-04 17:46:04,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:04,294 INFO L93 Difference]: Finished difference Result 365 states and 410 transitions. [2020-09-04 17:46:04,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 17:46:04,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-09-04 17:46:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:04,301 INFO L225 Difference]: With dead ends: 365 [2020-09-04 17:46:04,302 INFO L226 Difference]: Without dead ends: 275 [2020-09-04 17:46:04,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-04 17:46:04,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-09-04 17:46:04,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 140. [2020-09-04 17:46:04,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-04 17:46:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 157 transitions. [2020-09-04 17:46:04,338 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 157 transitions. Word has length 62 [2020-09-04 17:46:04,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:04,339 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 157 transitions. [2020-09-04 17:46:04,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 17:46:04,339 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 157 transitions. [2020-09-04 17:46:04,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-04 17:46:04,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:04,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:04,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:46:04,357 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:04,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:04,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1116699365, now seen corresponding path program 1 times [2020-09-04 17:46:04,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:04,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277601081] [2020-09-04 17:46:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:04,360 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:04,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:04,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-04 17:46:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:04,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277601081] [2020-09-04 17:46:04,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:04,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 17:46:04,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740228276] [2020-09-04 17:46:04,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 17:46:04,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:04,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 17:46:04,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-04 17:46:04,535 INFO L87 Difference]: Start difference. First operand 140 states and 157 transitions. Second operand 10 states. [2020-09-04 17:46:05,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:05,144 INFO L93 Difference]: Finished difference Result 430 states and 486 transitions. [2020-09-04 17:46:05,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 17:46:05,145 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-09-04 17:46:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:05,148 INFO L225 Difference]: With dead ends: 430 [2020-09-04 17:46:05,148 INFO L226 Difference]: Without dead ends: 340 [2020-09-04 17:46:05,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-04 17:46:05,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-04 17:46:05,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 144. [2020-09-04 17:46:05,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-04 17:46:05,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 161 transitions. [2020-09-04 17:46:05,172 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 161 transitions. Word has length 65 [2020-09-04 17:46:05,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:05,173 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 161 transitions. [2020-09-04 17:46:05,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 17:46:05,173 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 161 transitions. [2020-09-04 17:46:05,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-04 17:46:05,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:05,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:05,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:46:05,176 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:05,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:05,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1492663361, now seen corresponding path program 1 times [2020-09-04 17:46:05,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:05,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229276382] [2020-09-04 17:46:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:05,179 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:05,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:05,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-04 17:46:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:05,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229276382] [2020-09-04 17:46:05,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:05,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 17:46:05,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360192781] [2020-09-04 17:46:05,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 17:46:05,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:05,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 17:46:05,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 17:46:05,248 INFO L87 Difference]: Start difference. First operand 144 states and 161 transitions. Second operand 4 states. [2020-09-04 17:46:05,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:05,447 INFO L93 Difference]: Finished difference Result 233 states and 260 transitions. [2020-09-04 17:46:05,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 17:46:05,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-09-04 17:46:05,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:05,451 INFO L225 Difference]: With dead ends: 233 [2020-09-04 17:46:05,451 INFO L226 Difference]: Without dead ends: 145 [2020-09-04 17:46:05,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 17:46:05,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-04 17:46:05,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-09-04 17:46:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-04 17:46:05,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2020-09-04 17:46:05,468 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 65 [2020-09-04 17:46:05,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:05,469 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2020-09-04 17:46:05,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 17:46:05,469 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2020-09-04 17:46:05,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-04 17:46:05,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:05,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:05,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 17:46:05,471 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:05,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:05,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1492389340, now seen corresponding path program 1 times [2020-09-04 17:46:05,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:05,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900761715] [2020-09-04 17:46:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:05,474 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:05,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:05,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-04 17:46:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:05,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900761715] [2020-09-04 17:46:05,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:05,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 17:46:05,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738742047] [2020-09-04 17:46:05,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 17:46:05,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:05,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 17:46:05,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-04 17:46:05,653 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand 10 states. [2020-09-04 17:46:06,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:06,199 INFO L93 Difference]: Finished difference Result 388 states and 434 transitions. [2020-09-04 17:46:06,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 17:46:06,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-09-04 17:46:06,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:06,203 INFO L225 Difference]: With dead ends: 388 [2020-09-04 17:46:06,203 INFO L226 Difference]: Without dead ends: 285 [2020-09-04 17:46:06,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-09-04 17:46:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-09-04 17:46:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 155. [2020-09-04 17:46:06,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-04 17:46:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 173 transitions. [2020-09-04 17:46:06,241 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 173 transitions. Word has length 67 [2020-09-04 17:46:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:06,242 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 173 transitions. [2020-09-04 17:46:06,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 17:46:06,242 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 173 transitions. [2020-09-04 17:46:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-04 17:46:06,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:06,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:06,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 17:46:06,247 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:06,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:06,247 INFO L82 PathProgramCache]: Analyzing trace with hash 122758570, now seen corresponding path program 1 times [2020-09-04 17:46:06,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:06,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720358690] [2020-09-04 17:46:06,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:06,250 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:06,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:06,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-04 17:46:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:06,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720358690] [2020-09-04 17:46:06,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:06,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-04 17:46:06,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002051505] [2020-09-04 17:46:06,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 17:46:06,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:06,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 17:46:06,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-09-04 17:46:06,456 INFO L87 Difference]: Start difference. First operand 155 states and 173 transitions. Second operand 12 states. [2020-09-04 17:46:07,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:07,066 INFO L93 Difference]: Finished difference Result 425 states and 477 transitions. [2020-09-04 17:46:07,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 17:46:07,067 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2020-09-04 17:46:07,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:07,073 INFO L225 Difference]: With dead ends: 425 [2020-09-04 17:46:07,073 INFO L226 Difference]: Without dead ends: 322 [2020-09-04 17:46:07,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-09-04 17:46:07,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-04 17:46:07,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 136. [2020-09-04 17:46:07,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-04 17:46:07,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 151 transitions. [2020-09-04 17:46:07,090 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 151 transitions. Word has length 70 [2020-09-04 17:46:07,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:07,091 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 151 transitions. [2020-09-04 17:46:07,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 17:46:07,091 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 151 transitions. [2020-09-04 17:46:07,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-04 17:46:07,097 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:07,097 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:07,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 17:46:07,098 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:07,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:07,098 INFO L82 PathProgramCache]: Analyzing trace with hash -272178825, now seen corresponding path program 1 times [2020-09-04 17:46:07,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:07,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141240804] [2020-09-04 17:46:07,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:07,130 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:07,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:07,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-04 17:46:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:07,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141240804] [2020-09-04 17:46:07,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:07,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 17:46:07,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672092684] [2020-09-04 17:46:07,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 17:46:07,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:07,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 17:46:07,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 17:46:07,234 INFO L87 Difference]: Start difference. First operand 136 states and 151 transitions. Second operand 4 states. [2020-09-04 17:46:07,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:07,416 INFO L93 Difference]: Finished difference Result 226 states and 251 transitions. [2020-09-04 17:46:07,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 17:46:07,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-09-04 17:46:07,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:07,418 INFO L225 Difference]: With dead ends: 226 [2020-09-04 17:46:07,418 INFO L226 Difference]: Without dead ends: 137 [2020-09-04 17:46:07,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 17:46:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-04 17:46:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-09-04 17:46:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-04 17:46:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2020-09-04 17:46:07,431 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 72 [2020-09-04 17:46:07,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:07,436 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2020-09-04 17:46:07,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 17:46:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2020-09-04 17:46:07,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-04 17:46:07,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:07,441 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:07,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 17:46:07,442 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:07,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:07,442 INFO L82 PathProgramCache]: Analyzing trace with hash 588909148, now seen corresponding path program 1 times [2020-09-04 17:46:07,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:07,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630633500] [2020-09-04 17:46:07,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:07,459 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:07,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:07,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-04 17:46:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:07,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630633500] [2020-09-04 17:46:07,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:07,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 17:46:07,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237605824] [2020-09-04 17:46:07,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 17:46:07,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:07,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 17:46:07,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-04 17:46:07,590 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand 10 states. [2020-09-04 17:46:08,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:08,165 INFO L93 Difference]: Finished difference Result 389 states and 436 transitions. [2020-09-04 17:46:08,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 17:46:08,166 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-09-04 17:46:08,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:08,168 INFO L225 Difference]: With dead ends: 389 [2020-09-04 17:46:08,168 INFO L226 Difference]: Without dead ends: 296 [2020-09-04 17:46:08,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-09-04 17:46:08,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-09-04 17:46:08,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 200. [2020-09-04 17:46:08,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-04 17:46:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 223 transitions. [2020-09-04 17:46:08,186 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 223 transitions. Word has length 72 [2020-09-04 17:46:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:08,186 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 223 transitions. [2020-09-04 17:46:08,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 17:46:08,187 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 223 transitions. [2020-09-04 17:46:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 17:46:08,188 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:08,188 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:08,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 17:46:08,188 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:08,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:08,189 INFO L82 PathProgramCache]: Analyzing trace with hash 69190993, now seen corresponding path program 1 times [2020-09-04 17:46:08,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:08,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998147051] [2020-09-04 17:46:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:08,201 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:08,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:08,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-04 17:46:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:08,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998147051] [2020-09-04 17:46:08,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:08,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 17:46:08,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344264037] [2020-09-04 17:46:08,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 17:46:08,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:08,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 17:46:08,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-04 17:46:08,354 INFO L87 Difference]: Start difference. First operand 200 states and 223 transitions. Second operand 8 states. [2020-09-04 17:46:08,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:08,761 INFO L93 Difference]: Finished difference Result 288 states and 323 transitions. [2020-09-04 17:46:08,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 17:46:08,761 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-09-04 17:46:08,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:08,764 INFO L225 Difference]: With dead ends: 288 [2020-09-04 17:46:08,764 INFO L226 Difference]: Without dead ends: 286 [2020-09-04 17:46:08,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-09-04 17:46:08,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-09-04 17:46:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 254. [2020-09-04 17:46:08,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-09-04 17:46:08,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 285 transitions. [2020-09-04 17:46:08,783 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 285 transitions. Word has length 73 [2020-09-04 17:46:08,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:08,784 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 285 transitions. [2020-09-04 17:46:08,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 17:46:08,784 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 285 transitions. [2020-09-04 17:46:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-04 17:46:08,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:08,787 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:08,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 17:46:08,788 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:08,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:08,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1474625812, now seen corresponding path program 1 times [2020-09-04 17:46:08,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:08,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040266234] [2020-09-04 17:46:08,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:08,795 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:08,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:08,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-04 17:46:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:08,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040266234] [2020-09-04 17:46:08,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:08,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-04 17:46:08,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925431540] [2020-09-04 17:46:08,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 17:46:08,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:08,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 17:46:08,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-09-04 17:46:08,971 INFO L87 Difference]: Start difference. First operand 254 states and 285 transitions. Second operand 12 states. [2020-09-04 17:46:09,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:09,865 INFO L93 Difference]: Finished difference Result 460 states and 517 transitions. [2020-09-04 17:46:09,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 17:46:09,865 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-09-04 17:46:09,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:09,870 INFO L225 Difference]: With dead ends: 460 [2020-09-04 17:46:09,870 INFO L226 Difference]: Without dead ends: 367 [2020-09-04 17:46:09,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-09-04 17:46:09,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-09-04 17:46:09,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 258. [2020-09-04 17:46:09,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-04 17:46:09,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 289 transitions. [2020-09-04 17:46:09,895 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 289 transitions. Word has length 75 [2020-09-04 17:46:09,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:09,895 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 289 transitions. [2020-09-04 17:46:09,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 17:46:09,895 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 289 transitions. [2020-09-04 17:46:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-04 17:46:09,898 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:09,898 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:09,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 17:46:09,899 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:09,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:09,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1908172287, now seen corresponding path program 1 times [2020-09-04 17:46:09,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:09,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869377391] [2020-09-04 17:46:09,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:09,907 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:09,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:09,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-04 17:46:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:10,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869377391] [2020-09-04 17:46:10,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:10,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 17:46:10,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495572668] [2020-09-04 17:46:10,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 17:46:10,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:10,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 17:46:10,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-04 17:46:10,004 INFO L87 Difference]: Start difference. First operand 258 states and 289 transitions. Second operand 8 states. [2020-09-04 17:46:10,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:10,561 INFO L93 Difference]: Finished difference Result 432 states and 485 transitions. [2020-09-04 17:46:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 17:46:10,562 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-09-04 17:46:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:10,564 INFO L225 Difference]: With dead ends: 432 [2020-09-04 17:46:10,565 INFO L226 Difference]: Without dead ends: 339 [2020-09-04 17:46:10,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-09-04 17:46:10,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-09-04 17:46:10,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 258. [2020-09-04 17:46:10,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-04 17:46:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 289 transitions. [2020-09-04 17:46:10,590 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 289 transitions. Word has length 76 [2020-09-04 17:46:10,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:10,591 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 289 transitions. [2020-09-04 17:46:10,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 17:46:10,591 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 289 transitions. [2020-09-04 17:46:10,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-04 17:46:10,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:10,593 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:10,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 17:46:10,593 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:10,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:10,594 INFO L82 PathProgramCache]: Analyzing trace with hash 116425250, now seen corresponding path program 1 times [2020-09-04 17:46:10,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:10,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189593478] [2020-09-04 17:46:10,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:10,600 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:10,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:10,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-04 17:46:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:10,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189593478] [2020-09-04 17:46:10,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:10,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 17:46:10,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666945036] [2020-09-04 17:46:10,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 17:46:10,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:10,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 17:46:10,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:46:10,661 INFO L87 Difference]: Start difference. First operand 258 states and 289 transitions. Second operand 5 states. [2020-09-04 17:46:10,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:10,867 INFO L93 Difference]: Finished difference Result 369 states and 412 transitions. [2020-09-04 17:46:10,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 17:46:10,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-09-04 17:46:10,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:10,870 INFO L225 Difference]: With dead ends: 369 [2020-09-04 17:46:10,870 INFO L226 Difference]: Without dead ends: 280 [2020-09-04 17:46:10,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:46:10,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-04 17:46:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 260. [2020-09-04 17:46:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-09-04 17:46:10,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 291 transitions. [2020-09-04 17:46:10,890 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 291 transitions. Word has length 76 [2020-09-04 17:46:10,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:10,891 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 291 transitions. [2020-09-04 17:46:10,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 17:46:10,891 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 291 transitions. [2020-09-04 17:46:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-04 17:46:10,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:10,893 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:10,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 17:46:10,893 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:10,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1122457453, now seen corresponding path program 1 times [2020-09-04 17:46:10,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:10,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69803692] [2020-09-04 17:46:10,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:10,907 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:10,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:10,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 17:46:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:10,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69803692] [2020-09-04 17:46:10,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:10,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 17:46:10,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647324165] [2020-09-04 17:46:10,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 17:46:10,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:10,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 17:46:10,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:46:10,984 INFO L87 Difference]: Start difference. First operand 260 states and 291 transitions. Second operand 6 states. [2020-09-04 17:46:11,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:11,236 INFO L93 Difference]: Finished difference Result 411 states and 459 transitions. [2020-09-04 17:46:11,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 17:46:11,237 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-09-04 17:46:11,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:11,240 INFO L225 Difference]: With dead ends: 411 [2020-09-04 17:46:11,241 INFO L226 Difference]: Without dead ends: 297 [2020-09-04 17:46:11,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-04 17:46:11,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-09-04 17:46:11,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 253. [2020-09-04 17:46:11,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-09-04 17:46:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 281 transitions. [2020-09-04 17:46:11,261 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 281 transitions. Word has length 77 [2020-09-04 17:46:11,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:11,261 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 281 transitions. [2020-09-04 17:46:11,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 17:46:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 281 transitions. [2020-09-04 17:46:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-04 17:46:11,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:11,263 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:11,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 17:46:11,263 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:11,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:11,264 INFO L82 PathProgramCache]: Analyzing trace with hash 2031617893, now seen corresponding path program 1 times [2020-09-04 17:46:11,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:11,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167528434] [2020-09-04 17:46:11,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:11,270 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:11,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:11,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-04 17:46:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:11,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167528434] [2020-09-04 17:46:11,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:11,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 17:46:11,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946913153] [2020-09-04 17:46:11,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 17:46:11,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:11,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 17:46:11,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-04 17:46:11,373 INFO L87 Difference]: Start difference. First operand 253 states and 281 transitions. Second operand 8 states. [2020-09-04 17:46:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:11,841 INFO L93 Difference]: Finished difference Result 521 states and 577 transitions. [2020-09-04 17:46:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 17:46:11,841 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-09-04 17:46:11,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:11,845 INFO L225 Difference]: With dead ends: 521 [2020-09-04 17:46:11,845 INFO L226 Difference]: Without dead ends: 331 [2020-09-04 17:46:11,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-04 17:46:11,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-09-04 17:46:11,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 264. [2020-09-04 17:46:11,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-09-04 17:46:11,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 292 transitions. [2020-09-04 17:46:11,874 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 292 transitions. Word has length 78 [2020-09-04 17:46:11,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:11,874 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 292 transitions. [2020-09-04 17:46:11,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 17:46:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 292 transitions. [2020-09-04 17:46:11,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 17:46:11,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:11,877 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:11,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 17:46:11,878 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:11,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:11,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1446971750, now seen corresponding path program 1 times [2020-09-04 17:46:11,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:11,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96749392] [2020-09-04 17:46:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:11,887 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:11,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:11,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-04 17:46:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:12,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96749392] [2020-09-04 17:46:12,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:12,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 17:46:12,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269316324] [2020-09-04 17:46:12,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 17:46:12,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:12,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 17:46:12,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-04 17:46:12,010 INFO L87 Difference]: Start difference. First operand 264 states and 292 transitions. Second operand 10 states. [2020-09-04 17:46:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:12,544 INFO L93 Difference]: Finished difference Result 599 states and 665 transitions. [2020-09-04 17:46:12,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 17:46:12,545 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-09-04 17:46:12,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:12,552 INFO L225 Difference]: With dead ends: 599 [2020-09-04 17:46:12,553 INFO L226 Difference]: Without dead ends: 435 [2020-09-04 17:46:12,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-09-04 17:46:12,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-09-04 17:46:12,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 355. [2020-09-04 17:46:12,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-09-04 17:46:12,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 393 transitions. [2020-09-04 17:46:12,596 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 393 transitions. Word has length 79 [2020-09-04 17:46:12,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:12,597 INFO L479 AbstractCegarLoop]: Abstraction has 355 states and 393 transitions. [2020-09-04 17:46:12,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 17:46:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 393 transitions. [2020-09-04 17:46:12,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-04 17:46:12,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:12,599 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:12,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 17:46:12,599 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:12,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:12,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1140392269, now seen corresponding path program 2 times [2020-09-04 17:46:12,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:12,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114208187] [2020-09-04 17:46:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:12,609 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:12,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:12,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-04 17:46:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:12,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114208187] [2020-09-04 17:46:12,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:12,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-04 17:46:12,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989414439] [2020-09-04 17:46:12,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 17:46:12,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:12,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 17:46:12,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-09-04 17:46:12,833 INFO L87 Difference]: Start difference. First operand 355 states and 393 transitions. Second operand 12 states. [2020-09-04 17:46:13,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:13,566 INFO L93 Difference]: Finished difference Result 694 states and 770 transitions. [2020-09-04 17:46:13,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 17:46:13,569 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-09-04 17:46:13,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:13,572 INFO L225 Difference]: With dead ends: 694 [2020-09-04 17:46:13,573 INFO L226 Difference]: Without dead ends: 525 [2020-09-04 17:46:13,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-09-04 17:46:13,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-09-04 17:46:13,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 390. [2020-09-04 17:46:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-09-04 17:46:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 432 transitions. [2020-09-04 17:46:13,603 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 432 transitions. Word has length 82 [2020-09-04 17:46:13,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:13,604 INFO L479 AbstractCegarLoop]: Abstraction has 390 states and 432 transitions. [2020-09-04 17:46:13,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 17:46:13,604 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 432 transitions. [2020-09-04 17:46:13,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-04 17:46:13,605 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:13,606 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:13,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 17:46:13,606 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:13,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:13,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1836590973, now seen corresponding path program 2 times [2020-09-04 17:46:13,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:13,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416752285] [2020-09-04 17:46:13,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:13,614 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:13,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:13,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-04 17:46:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:13,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416752285] [2020-09-04 17:46:13,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:13,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-04 17:46:13,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076585905] [2020-09-04 17:46:13,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 17:46:13,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:13,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 17:46:13,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-09-04 17:46:13,793 INFO L87 Difference]: Start difference. First operand 390 states and 432 transitions. Second operand 14 states. [2020-09-04 17:46:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:14,758 INFO L93 Difference]: Finished difference Result 680 states and 754 transitions. [2020-09-04 17:46:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 17:46:14,759 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 85 [2020-09-04 17:46:14,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:14,762 INFO L225 Difference]: With dead ends: 680 [2020-09-04 17:46:14,762 INFO L226 Difference]: Without dead ends: 428 [2020-09-04 17:46:14,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2020-09-04 17:46:14,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-09-04 17:46:14,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 247. [2020-09-04 17:46:14,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-09-04 17:46:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 270 transitions. [2020-09-04 17:46:14,788 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 270 transitions. Word has length 85 [2020-09-04 17:46:14,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:14,789 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 270 transitions. [2020-09-04 17:46:14,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 17:46:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 270 transitions. [2020-09-04 17:46:14,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-04 17:46:14,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:14,791 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:14,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 17:46:14,791 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:14,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:14,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1723821108, now seen corresponding path program 2 times [2020-09-04 17:46:14,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:14,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509456035] [2020-09-04 17:46:14,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:14,797 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:14,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:14,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-04 17:46:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:14,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:14,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509456035] [2020-09-04 17:46:14,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:14,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 17:46:14,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716451498] [2020-09-04 17:46:14,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 17:46:14,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:14,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 17:46:14,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:46:14,887 INFO L87 Difference]: Start difference. First operand 247 states and 270 transitions. Second operand 6 states. [2020-09-04 17:46:15,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:15,186 INFO L93 Difference]: Finished difference Result 387 states and 425 transitions. [2020-09-04 17:46:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 17:46:15,186 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2020-09-04 17:46:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:15,190 INFO L225 Difference]: With dead ends: 387 [2020-09-04 17:46:15,191 INFO L226 Difference]: Without dead ends: 290 [2020-09-04 17:46:15,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-04 17:46:15,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-04 17:46:15,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 247. [2020-09-04 17:46:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-09-04 17:46:15,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 269 transitions. [2020-09-04 17:46:15,211 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 269 transitions. Word has length 90 [2020-09-04 17:46:15,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:15,211 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 269 transitions. [2020-09-04 17:46:15,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 17:46:15,211 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 269 transitions. [2020-09-04 17:46:15,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-09-04 17:46:15,213 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:15,213 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:15,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 17:46:15,213 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:15,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:15,214 INFO L82 PathProgramCache]: Analyzing trace with hash 888855281, now seen corresponding path program 1 times [2020-09-04 17:46:15,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:15,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330715223] [2020-09-04 17:46:15,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:15,221 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 17:46:15,244 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 17:46:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 17:46:15,268 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 17:46:15,322 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 17:46:15,322 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 17:46:15,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 17:46:15,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 05:46:15 BoogieIcfgContainer [2020-09-04 17:46:15,358 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 17:46:15,362 INFO L168 Benchmark]: Toolchain (without parser) took 14346.85 ms. Allocated memory was 140.0 MB in the beginning and 353.9 MB in the end (delta: 213.9 MB). Free memory was 102.4 MB in the beginning and 238.8 MB in the end (delta: -136.4 MB). Peak memory consumption was 77.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:15,367 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 140.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 17:46:15,367 INFO L168 Benchmark]: CACSL2BoogieTranslator took 504.87 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 102.0 MB in the beginning and 181.8 MB in the end (delta: -79.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:15,370 INFO L168 Benchmark]: Boogie Preprocessor took 56.83 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 179.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:15,371 INFO L168 Benchmark]: RCFGBuilder took 602.06 ms. Allocated memory is still 204.5 MB. Free memory was 179.2 MB in the beginning and 146.9 MB in the end (delta: 32.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:15,372 INFO L168 Benchmark]: TraceAbstraction took 13176.99 ms. Allocated memory was 204.5 MB in the beginning and 353.9 MB in the end (delta: 149.4 MB). Free memory was 146.2 MB in the beginning and 238.8 MB in the end (delta: -92.5 MB). Peak memory consumption was 56.9 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:15,379 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 140.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 504.87 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 102.0 MB in the beginning and 181.8 MB in the end (delta: -79.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.83 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 179.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 602.06 ms. Allocated memory is still 204.5 MB. Free memory was 179.2 MB in the beginning and 146.9 MB in the end (delta: 32.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13176.99 ms. Allocated memory was 204.5 MB in the beginning and 353.9 MB in the end (delta: 149.4 MB). Free memory was 146.2 MB in the beginning and 238.8 MB in the end (delta: -92.5 MB). Peak memory consumption was 56.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L74] char A [2 + 2 + 4 +1]; [L75] A[2 + 2 + 4] = 0 [L76] CALL parse_expression_list (A) [L48] int start=0, i=-1, j=-1; [L49] char str2[2]; [L50] COND FALSE !(!str) [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L56] EXPR str[start] [L56] COND FALSE !(str[start] == '"') [L57] j = i-1 [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L59] (0 < j) && (str[j] == '"') [L59] EXPR str[j] [L59] (0 < j) && (str[j] == '"') [L59] COND FALSE !((0 < j) && (str[j] == '"')) [L60] COND TRUE start<=j [L61] CALL r_strncpy(str2, str+start, j-start+1) [L30] return strncpy(dest,src,n); [L61] RET r_strncpy(str2, str+start, j-start+1) [L62] CALL __VERIFIER_assert(j - start + 1 < 2) [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 123 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.0s, OverallIterations: 20, TraceHistogramMax: 3, AutomataDifference: 9.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2560 SDtfs, 3565 SDslu, 9431 SDs, 0 SdLazy, 6214 SolverSat, 277 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 323 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=390occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 19 MinimizatonAttempts, 1535 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...