/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-examples/relax-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:23:39,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:23:39,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:23:39,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 07:23:39,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 07:23:39,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 07:23:39,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 07:23:39,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 07:23:39,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 07:23:39,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 07:23:39,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 07:23:39,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 07:23:39,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 07:23:39,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 07:23:39,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 07:23:39,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 07:23:39,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 07:23:39,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 07:23:39,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 07:23:39,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 07:23:39,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 07:23:39,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 07:23:39,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 07:23:39,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 07:23:39,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 07:23:39,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 07:23:39,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 07:23:39,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 07:23:39,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 07:23:39,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 07:23:39,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 07:23:39,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 07:23:39,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 07:23:39,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 07:23:39,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 07:23:39,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 07:23:39,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 07:23:39,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 07:23:39,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:23:39,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:23:39,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:23:39,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 07:23:39,414 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:23:39,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:23:39,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:23:39,415 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:23:39,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:23:39,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:23:39,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:23:39,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:23:39,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:23:39,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:23:39,416 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:23:39,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:23:39,416 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:23:39,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:23:39,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:23:39,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:23:39,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 07:23:39,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:23:39,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:23:39,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:23:39,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:23:39,417 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 07:23:39,417 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:23:39,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:23:39,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:23:39,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:23:39,633 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:23:39,634 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:23:39,635 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/relax-2.i [2022-01-31 07:23:39,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/697817025/b3245864b9b043e68d007584556497a7/FLAGd38a3efa9 [2022-01-31 07:23:40,026 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:23:40,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/relax-2.i [2022-01-31 07:23:40,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/697817025/b3245864b9b043e68d007584556497a7/FLAGd38a3efa9 [2022-01-31 07:23:40,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/697817025/b3245864b9b043e68d007584556497a7 [2022-01-31 07:23:40,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:23:40,045 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 07:23:40,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:23:40,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:23:40,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:23:40,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14d34cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40, skipping insertion in model container [2022-01-31 07:23:40,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:23:40,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:23:40,224 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/relax-2.i[980,993] [2022-01-31 07:23:40,328 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:23:40,333 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:23:40,341 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/relax-2.i[980,993] [2022-01-31 07:23:40,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:23:40,404 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:23:40,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40 WrapperNode [2022-01-31 07:23:40,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:23:40,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:23:40,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:23:40,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:23:40,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:23:40,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:23:40,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:23:40,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:23:40,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:23:40,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:40,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 07:23:40,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 07:23:40,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:23:40,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:23:40,529 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 07:23:40,529 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:23:40,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 07:23:40,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2022-01-31 07:23:40,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2022-01-31 07:23:40,529 INFO L138 BoogieDeclarations]: Found implementation of procedure is_relaxed_prefix [2022-01-31 07:23:40,529 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:23:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2022-01-31 07:23:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 07:23:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:23:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 07:23:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:23:40,530 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 07:23:40,531 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 07:23:40,532 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:23:40,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:23:40,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:23:40,533 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2022-01-31 07:23:40,533 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2022-01-31 07:23:40,533 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2022-01-31 07:23:40,533 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2022-01-31 07:23:40,533 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2022-01-31 07:23:40,533 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2022-01-31 07:23:40,533 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2022-01-31 07:23:40,533 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2022-01-31 07:23:40,533 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2022-01-31 07:23:40,533 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2022-01-31 07:23:40,533 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2022-01-31 07:23:40,533 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2022-01-31 07:23:40,534 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2022-01-31 07:23:40,534 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2022-01-31 07:23:40,534 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2022-01-31 07:23:40,534 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2022-01-31 07:23:40,534 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2022-01-31 07:23:40,534 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2022-01-31 07:23:40,534 INFO L130 BoogieDeclarations]: Found specification of procedure select [2022-01-31 07:23:40,534 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2022-01-31 07:23:40,534 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2022-01-31 07:23:40,534 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2022-01-31 07:23:40,534 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2022-01-31 07:23:40,534 INFO L130 BoogieDeclarations]: Found specification of procedure random [2022-01-31 07:23:40,534 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2022-01-31 07:23:40,535 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2022-01-31 07:23:40,535 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2022-01-31 07:23:40,535 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2022-01-31 07:23:40,535 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2022-01-31 07:23:40,535 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2022-01-31 07:23:40,535 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2022-01-31 07:23:40,535 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2022-01-31 07:23:40,535 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2022-01-31 07:23:40,535 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2022-01-31 07:23:40,535 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2022-01-31 07:23:40,535 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2022-01-31 07:23:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2022-01-31 07:23:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2022-01-31 07:23:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2022-01-31 07:23:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2022-01-31 07:23:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2022-01-31 07:23:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2022-01-31 07:23:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2022-01-31 07:23:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2022-01-31 07:23:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2022-01-31 07:23:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2022-01-31 07:23:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2022-01-31 07:23:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2022-01-31 07:23:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2022-01-31 07:23:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2022-01-31 07:23:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2022-01-31 07:23:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2022-01-31 07:23:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 07:23:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-01-31 07:23:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2022-01-31 07:23:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-01-31 07:23:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2022-01-31 07:23:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2022-01-31 07:23:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2022-01-31 07:23:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2022-01-31 07:23:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2022-01-31 07:23:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2022-01-31 07:23:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2022-01-31 07:23:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2022-01-31 07:23:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2022-01-31 07:23:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2022-01-31 07:23:40,539 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2022-01-31 07:23:40,539 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2022-01-31 07:23:40,539 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2022-01-31 07:23:40,539 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2022-01-31 07:23:40,539 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2022-01-31 07:23:40,540 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2022-01-31 07:23:40,540 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2022-01-31 07:23:40,540 INFO L130 BoogieDeclarations]: Found specification of procedure system [2022-01-31 07:23:40,540 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2022-01-31 07:23:40,540 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2022-01-31 07:23:40,540 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2022-01-31 07:23:40,540 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2022-01-31 07:23:40,540 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2022-01-31 07:23:40,540 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2022-01-31 07:23:40,540 INFO L130 BoogieDeclarations]: Found specification of procedure div [2022-01-31 07:23:40,540 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2022-01-31 07:23:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2022-01-31 07:23:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2022-01-31 07:23:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2022-01-31 07:23:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2022-01-31 07:23:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2022-01-31 07:23:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2022-01-31 07:23:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2022-01-31 07:23:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2022-01-31 07:23:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2022-01-31 07:23:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2022-01-31 07:23:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2022-01-31 07:23:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2022-01-31 07:23:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2022-01-31 07:23:40,542 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2022-01-31 07:23:40,542 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2022-01-31 07:23:40,542 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2022-01-31 07:23:40,542 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2022-01-31 07:23:40,542 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2022-01-31 07:23:40,542 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2022-01-31 07:23:40,542 INFO L130 BoogieDeclarations]: Found specification of procedure is_relaxed_prefix [2022-01-31 07:23:40,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:23:40,542 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:23:40,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 07:23:40,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:23:40,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:23:40,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:23:40,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:23:40,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:23:40,729 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:23:40,730 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:23:40,895 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:23:40,899 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:23:40,900 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 07:23:40,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:40 BoogieIcfgContainer [2022-01-31 07:23:40,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:23:40,901 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 07:23:40,902 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 07:23:40,903 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 07:23:40,905 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:23:40 BasicIcfg [2022-01-31 07:23:40,923 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 07:23:40,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:23:40,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:23:40,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:23:40,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:23:40" (1/4) ... [2022-01-31 07:23:40,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57bec6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:23:40, skipping insertion in model container [2022-01-31 07:23:40,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (2/4) ... [2022-01-31 07:23:40,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57bec6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:23:40, skipping insertion in model container [2022-01-31 07:23:40,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:40" (3/4) ... [2022-01-31 07:23:40,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57bec6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:23:40, skipping insertion in model container [2022-01-31 07:23:40,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:23:40" (4/4) ... [2022-01-31 07:23:40,928 INFO L111 eAbstractionObserver]: Analyzing ICFG relax-2.iJordan [2022-01-31 07:23:40,932 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:23:40,932 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:23:40,960 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:23:40,966 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 07:23:40,966 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:23:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 07:23:40,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 07:23:40,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:40,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:40,984 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:40,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:40,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1148378210, now seen corresponding path program 1 times [2022-01-31 07:23:40,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:40,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082405959] [2022-01-31 07:23:40,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:40,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 07:23:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:41,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:41,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082405959] [2022-01-31 07:23:41,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082405959] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:41,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:41,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 07:23:41,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550276397] [2022-01-31 07:23:41,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:41,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:23:41,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:41,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:23:41,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:23:41,174 INFO L87 Difference]: Start difference. First operand has 58 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:41,231 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2022-01-31 07:23:41,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:23:41,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-01-31 07:23:41,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:41,240 INFO L225 Difference]: With dead ends: 58 [2022-01-31 07:23:41,240 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 07:23:41,241 INFO L932 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 [2022-01-31 07:23:41,245 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 58 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:41,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 74 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:41,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 07:23:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-01-31 07:23:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.4) internal successors, (56), 41 states have internal predecessors, (56), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 07:23:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2022-01-31 07:23:41,273 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 19 [2022-01-31 07:23:41,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:41,273 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2022-01-31 07:23:41,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:41,274 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2022-01-31 07:23:41,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 07:23:41,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:41,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:41,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:23:41,275 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:41,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:41,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1056234720, now seen corresponding path program 1 times [2022-01-31 07:23:41,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:41,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498527381] [2022-01-31 07:23:41,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:41,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 07:23:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:41,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:41,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498527381] [2022-01-31 07:23:41,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498527381] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:41,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:41,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 07:23:41,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201375576] [2022-01-31 07:23:41,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:41,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 07:23:41,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:41,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 07:23:41,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:41,400 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:23:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:41,560 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2022-01-31 07:23:41,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 07:23:41,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-01-31 07:23:41,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:41,563 INFO L225 Difference]: With dead ends: 56 [2022-01-31 07:23:41,564 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 07:23:41,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:23:41,569 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:41,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 76 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:41,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 07:23:41,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-01-31 07:23:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 42 states have (on average 1.380952380952381) internal successors, (58), 43 states have internal predecessors, (58), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 07:23:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2022-01-31 07:23:41,582 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 19 [2022-01-31 07:23:41,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:41,583 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2022-01-31 07:23:41,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:23:41,583 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2022-01-31 07:23:41,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 07:23:41,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:41,584 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:41,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 07:23:41,585 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:41,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:41,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1426470259, now seen corresponding path program 1 times [2022-01-31 07:23:41,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:41,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318791928] [2022-01-31 07:23:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:41,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 07:23:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:41,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:41,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318791928] [2022-01-31 07:23:41,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318791928] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:41,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:41,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 07:23:41,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122005029] [2022-01-31 07:23:41,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:41,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 07:23:41,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:41,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 07:23:41,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:23:41,723 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:41,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:41,956 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2022-01-31 07:23:41,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 07:23:41,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-01-31 07:23:41,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:41,958 INFO L225 Difference]: With dead ends: 77 [2022-01-31 07:23:41,958 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 07:23:41,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-31 07:23:41,964 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 100 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:41,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 78 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:23:41,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 07:23:41,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-01-31 07:23:41,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.36) internal successors, (68), 51 states have internal predecessors, (68), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 07:23:41,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 86 transitions. [2022-01-31 07:23:41,984 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 86 transitions. Word has length 21 [2022-01-31 07:23:41,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:41,984 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 86 transitions. [2022-01-31 07:23:41,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 86 transitions. [2022-01-31 07:23:41,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 07:23:41,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:41,986 INFO L514 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] [2022-01-31 07:23:41,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 07:23:41,987 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:41,989 INFO L85 PathProgramCache]: Analyzing trace with hash -246184187, now seen corresponding path program 1 times [2022-01-31 07:23:41,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:41,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842915198] [2022-01-31 07:23:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:41,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 07:23:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:42,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:42,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842915198] [2022-01-31 07:23:42,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842915198] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:42,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:42,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 07:23:42,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250126279] [2022-01-31 07:23:42,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:42,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 07:23:42,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:42,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 07:23:42,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:23:42,175 INFO L87 Difference]: Start difference. First operand 65 states and 86 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:42,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:42,397 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2022-01-31 07:23:42,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:23:42,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-01-31 07:23:42,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:42,402 INFO L225 Difference]: With dead ends: 71 [2022-01-31 07:23:42,402 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 07:23:42,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-31 07:23:42,407 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 101 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:42,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 75 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:23:42,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 07:23:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-01-31 07:23:42,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 55 states have internal predecessors, (73), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 07:23:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2022-01-31 07:23:42,418 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 22 [2022-01-31 07:23:42,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:42,418 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2022-01-31 07:23:42,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2022-01-31 07:23:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 07:23:42,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:42,419 INFO L514 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] [2022-01-31 07:23:42,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 07:23:42,420 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:42,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:42,420 INFO L85 PathProgramCache]: Analyzing trace with hash 882833201, now seen corresponding path program 1 times [2022-01-31 07:23:42,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:42,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577409143] [2022-01-31 07:23:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:42,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 07:23:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:42,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:42,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577409143] [2022-01-31 07:23:42,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577409143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:42,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267853788] [2022-01-31 07:23:42,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:42,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:42,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:42,705 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:42,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 07:23:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 07:23:42,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:42,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:23:42,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267853788] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:42,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:23:42,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2022-01-31 07:23:42,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279213678] [2022-01-31 07:23:42,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:42,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 07:23:42,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 07:23:42,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-01-31 07:23:42,990 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:23:43,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:43,070 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2022-01-31 07:23:43,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:23:43,071 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-01-31 07:23:43,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:43,072 INFO L225 Difference]: With dead ends: 77 [2022-01-31 07:23:43,072 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 07:23:43,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-31 07:23:43,072 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 48 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:43,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 286 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:43,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 07:23:43,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2022-01-31 07:23:43,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 58 states have internal predecessors, (76), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 07:23:43,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2022-01-31 07:23:43,076 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 23 [2022-01-31 07:23:43,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:43,076 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2022-01-31 07:23:43,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:23:43,076 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2022-01-31 07:23:43,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 07:23:43,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:43,077 INFO L514 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] [2022-01-31 07:23:43,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:43,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:43,292 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:43,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:43,292 INFO L85 PathProgramCache]: Analyzing trace with hash -35257966, now seen corresponding path program 1 times [2022-01-31 07:23:43,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:43,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187094785] [2022-01-31 07:23:43,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:43,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 07:23:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:43,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:43,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187094785] [2022-01-31 07:23:43,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187094785] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:43,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:43,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 07:23:43,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720186508] [2022-01-31 07:23:43,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:43,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 07:23:43,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:43,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 07:23:43,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:43,330 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:23:43,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:43,425 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2022-01-31 07:23:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 07:23:43,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-01-31 07:23:43,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:43,426 INFO L225 Difference]: With dead ends: 70 [2022-01-31 07:23:43,426 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 07:23:43,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:23:43,426 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 53 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:43,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 77 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:43,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 07:23:43,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2022-01-31 07:23:43,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.326086956521739) internal successors, (61), 47 states have internal predecessors, (61), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 07:23:43,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2022-01-31 07:23:43,430 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 24 [2022-01-31 07:23:43,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:43,430 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2022-01-31 07:23:43,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:23:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2022-01-31 07:23:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 07:23:43,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:43,431 INFO L514 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] [2022-01-31 07:23:43,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 07:23:43,431 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:43,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:43,431 INFO L85 PathProgramCache]: Analyzing trace with hash 80012678, now seen corresponding path program 1 times [2022-01-31 07:23:43,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:43,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723218774] [2022-01-31 07:23:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:43,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 07:23:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:43,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:43,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723218774] [2022-01-31 07:23:43,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723218774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:43,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271418756] [2022-01-31 07:23:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:43,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:43,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:43,637 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:43,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 07:23:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 07:23:43,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:43,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:23:43,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271418756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:43,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:23:43,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 12 [2022-01-31 07:23:43,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632049899] [2022-01-31 07:23:43,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:43,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 07:23:43,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:43,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 07:23:43,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-31 07:23:43,886 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:23:43,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:43,932 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-01-31 07:23:43,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 07:23:43,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-01-31 07:23:43,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:43,934 INFO L225 Difference]: With dead ends: 65 [2022-01-31 07:23:43,934 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 07:23:43,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-31 07:23:43,934 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 13 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:43,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 229 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 07:23:43,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-01-31 07:23:43,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 47 states have internal predecessors, (60), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 07:23:43,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2022-01-31 07:23:43,937 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 24 [2022-01-31 07:23:43,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:43,937 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2022-01-31 07:23:43,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:23:43,938 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2022-01-31 07:23:43,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 07:23:43,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:43,938 INFO L514 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] [2022-01-31 07:23:43,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:44,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-01-31 07:23:44,152 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:44,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:44,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1704119086, now seen corresponding path program 1 times [2022-01-31 07:23:44,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:44,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665116487] [2022-01-31 07:23:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:44,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 07:23:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:44,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:44,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665116487] [2022-01-31 07:23:44,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665116487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:44,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:44,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 07:23:44,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211168226] [2022-01-31 07:23:44,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:44,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:23:44,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:44,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:23:44,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:23:44,193 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:23:44,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:44,260 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2022-01-31 07:23:44,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:23:44,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-01-31 07:23:44,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:44,261 INFO L225 Difference]: With dead ends: 70 [2022-01-31 07:23:44,261 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 07:23:44,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:44,262 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 68 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:44,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 67 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:44,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 07:23:44,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-01-31 07:23:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.32) internal successors, (66), 51 states have internal predecessors, (66), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 07:23:44,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2022-01-31 07:23:44,265 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 26 [2022-01-31 07:23:44,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:44,265 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2022-01-31 07:23:44,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:23:44,265 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2022-01-31 07:23:44,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 07:23:44,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:44,265 INFO L514 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] [2022-01-31 07:23:44,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 07:23:44,266 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:44,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:44,266 INFO L85 PathProgramCache]: Analyzing trace with hash -809584029, now seen corresponding path program 1 times [2022-01-31 07:23:44,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:44,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066579186] [2022-01-31 07:23:44,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:44,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 07:23:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:44,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:44,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066579186] [2022-01-31 07:23:44,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066579186] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:44,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:44,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 07:23:44,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233896241] [2022-01-31 07:23:44,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:44,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:23:44,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:44,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:23:44,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:23:44,294 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:23:44,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:44,365 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2022-01-31 07:23:44,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:23:44,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-01-31 07:23:44,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:44,366 INFO L225 Difference]: With dead ends: 68 [2022-01-31 07:23:44,366 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 07:23:44,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:44,366 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 65 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:44,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 68 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:44,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 07:23:44,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-01-31 07:23:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 52 states have internal predecessors, (67), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 07:23:44,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2022-01-31 07:23:44,369 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 27 [2022-01-31 07:23:44,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:44,369 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2022-01-31 07:23:44,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:23:44,369 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2022-01-31 07:23:44,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 07:23:44,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:44,370 INFO L514 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] [2022-01-31 07:23:44,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 07:23:44,370 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:44,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:44,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1217840160, now seen corresponding path program 1 times [2022-01-31 07:23:44,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:44,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997671005] [2022-01-31 07:23:44,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:44,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 07:23:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:44,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:44,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997671005] [2022-01-31 07:23:44,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997671005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:44,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414734649] [2022-01-31 07:23:44,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:44,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:44,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:44,462 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:44,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 07:23:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 07:23:44,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:44,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:44,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414734649] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:44,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-31 07:23:44,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 14 [2022-01-31 07:23:44,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580999761] [2022-01-31 07:23:44,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:44,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 07:23:44,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:44,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 07:23:44,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-31 07:23:44,766 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:44,837 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2022-01-31 07:23:44,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 07:23:44,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-01-31 07:23:44,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:44,839 INFO L225 Difference]: With dead ends: 79 [2022-01-31 07:23:44,839 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 07:23:44,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-31 07:23:44,840 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 34 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:44,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 236 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:44,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 07:23:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2022-01-31 07:23:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 53 states have internal predecessors, (68), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 07:23:44,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2022-01-31 07:23:44,846 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 30 [2022-01-31 07:23:44,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:44,846 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2022-01-31 07:23:44,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:44,847 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2022-01-31 07:23:44,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 07:23:44,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:44,849 INFO L514 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] [2022-01-31 07:23:44,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:45,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:45,065 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:45,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:45,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1296961730, now seen corresponding path program 1 times [2022-01-31 07:23:45,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:45,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765399214] [2022-01-31 07:23:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:45,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 07:23:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:45,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:45,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765399214] [2022-01-31 07:23:45,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765399214] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:45,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033765543] [2022-01-31 07:23:45,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:45,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:45,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:45,133 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:45,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 07:23:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 07:23:45,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:45,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:45,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033765543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:45,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:45,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 10] total 16 [2022-01-31 07:23:45,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698561809] [2022-01-31 07:23:45,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:45,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 07:23:45,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:45,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 07:23:45,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-01-31 07:23:45,489 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 16 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 5 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:23:45,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:45,946 INFO L93 Difference]: Finished difference Result 116 states and 153 transitions. [2022-01-31 07:23:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 07:23:45,947 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 5 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-01-31 07:23:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:45,948 INFO L225 Difference]: With dead ends: 116 [2022-01-31 07:23:45,948 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 07:23:45,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-31 07:23:45,948 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 249 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:45,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 106 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 07:23:45,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 07:23:45,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 84. [2022-01-31 07:23:45,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 67 states have internal predecessors, (87), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 07:23:45,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-01-31 07:23:45,952 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 32 [2022-01-31 07:23:45,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:45,952 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-01-31 07:23:45,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 5 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:23:45,952 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-01-31 07:23:45,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 07:23:45,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:45,953 INFO L514 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] [2022-01-31 07:23:45,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:46,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:46,153 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:46,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:46,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1297885251, now seen corresponding path program 1 times [2022-01-31 07:23:46,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:46,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721373252] [2022-01-31 07:23:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:46,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 07:23:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:46,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:46,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721373252] [2022-01-31 07:23:46,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721373252] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:46,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074541958] [2022-01-31 07:23:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:46,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:46,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:46,249 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:46,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 07:23:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 07:23:46,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:23:46,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:23:46,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074541958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:46,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:23:46,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-01-31 07:23:46,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948867597] [2022-01-31 07:23:46,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:46,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 07:23:46,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:46,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 07:23:46,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-31 07:23:46,444 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:23:46,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:46,489 INFO L93 Difference]: Finished difference Result 111 states and 144 transitions. [2022-01-31 07:23:46,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 07:23:46,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-01-31 07:23:46,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:46,490 INFO L225 Difference]: With dead ends: 111 [2022-01-31 07:23:46,491 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 07:23:46,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-31 07:23:46,491 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 22 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:46,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 277 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:46,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 07:23:46,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 92. [2022-01-31 07:23:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.2972972972972974) internal successors, (96), 74 states have internal predecessors, (96), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2022-01-31 07:23:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2022-01-31 07:23:46,494 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 32 [2022-01-31 07:23:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:46,495 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2022-01-31 07:23:46,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:23:46,495 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2022-01-31 07:23:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 07:23:46,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:46,495 INFO L514 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] [2022-01-31 07:23:46,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:46,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 07:23:46,706 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:46,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:46,707 INFO L85 PathProgramCache]: Analyzing trace with hash 2030531572, now seen corresponding path program 1 times [2022-01-31 07:23:46,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:46,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264589120] [2022-01-31 07:23:46,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:46,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 07:23:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:23:46,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:46,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264589120] [2022-01-31 07:23:46,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264589120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:46,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136417120] [2022-01-31 07:23:46,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:46,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:46,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:46,792 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:46,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 07:23:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 07:23:46,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:46,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:47,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136417120] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:47,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:47,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-31 07:23:47,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402687767] [2022-01-31 07:23:47,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:47,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 07:23:47,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:47,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 07:23:47,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-31 07:23:47,147 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:23:47,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:47,864 INFO L93 Difference]: Finished difference Result 131 states and 170 transitions. [2022-01-31 07:23:47,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 07:23:47,865 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-01-31 07:23:47,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:47,866 INFO L225 Difference]: With dead ends: 131 [2022-01-31 07:23:47,866 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 07:23:47,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 07:23:47,867 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 283 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:47,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 110 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 07:23:47,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 07:23:47,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 99. [2022-01-31 07:23:47,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 80 states have (on average 1.3125) internal successors, (105), 82 states have internal predecessors, (105), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2022-01-31 07:23:47,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2022-01-31 07:23:47,870 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 33 [2022-01-31 07:23:47,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:47,870 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2022-01-31 07:23:47,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:23:47,871 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2022-01-31 07:23:47,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 07:23:47,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:47,871 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 07:23:47,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:48,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:48,080 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:48,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:48,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1041847705, now seen corresponding path program 1 times [2022-01-31 07:23:48,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:48,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329818798] [2022-01-31 07:23:48,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:48,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 07:23:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 07:23:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:48,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:48,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329818798] [2022-01-31 07:23:48,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329818798] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:48,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780907438] [2022-01-31 07:23:48,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:48,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:48,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:48,197 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:48,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 07:23:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 07:23:48,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 07:23:48,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:23:48,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780907438] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:48,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:23:48,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-01-31 07:23:48,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974479720] [2022-01-31 07:23:48,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:48,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 07:23:48,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:48,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 07:23:48,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-31 07:23:48,425 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:48,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:48,490 INFO L93 Difference]: Finished difference Result 112 states and 142 transitions. [2022-01-31 07:23:48,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:23:48,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-01-31 07:23:48,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:48,491 INFO L225 Difference]: With dead ends: 112 [2022-01-31 07:23:48,492 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 07:23:48,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-31 07:23:48,492 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 20 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:48,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 284 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:48,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 07:23:48,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-01-31 07:23:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 80 states have (on average 1.3) internal successors, (104), 82 states have internal predecessors, (104), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2022-01-31 07:23:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2022-01-31 07:23:48,496 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 37 [2022-01-31 07:23:48,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:48,497 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2022-01-31 07:23:48,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:48,497 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2022-01-31 07:23:48,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 07:23:48,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:48,498 INFO L514 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] [2022-01-31 07:23:48,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:48,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:48,712 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:48,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:48,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2106823040, now seen corresponding path program 1 times [2022-01-31 07:23:48,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:48,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866940836] [2022-01-31 07:23:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:48,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 07:23:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 07:23:48,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:48,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866940836] [2022-01-31 07:23:48,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866940836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:48,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910168968] [2022-01-31 07:23:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:48,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:48,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:48,768 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:48,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 07:23:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:48,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 07:23:48,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:49,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 07:23:49,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910168968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:49,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:49,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 7] total 21 [2022-01-31 07:23:49,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617583037] [2022-01-31 07:23:49,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:49,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 07:23:49,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:49,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 07:23:49,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-31 07:23:49,159 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand has 21 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:50,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:50,520 INFO L93 Difference]: Finished difference Result 272 states and 384 transitions. [2022-01-31 07:23:50,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 07:23:50,535 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-01-31 07:23:50,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:50,537 INFO L225 Difference]: With dead ends: 272 [2022-01-31 07:23:50,537 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 07:23:50,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=2101, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 07:23:50,540 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 517 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:50,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 155 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 07:23:50,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 07:23:50,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 130. [2022-01-31 07:23:50,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 111 states have (on average 1.3423423423423424) internal successors, (149), 113 states have internal predecessors, (149), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2022-01-31 07:23:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 170 transitions. [2022-01-31 07:23:50,548 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 170 transitions. Word has length 37 [2022-01-31 07:23:50,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:50,548 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 170 transitions. [2022-01-31 07:23:50,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:50,548 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 170 transitions. [2022-01-31 07:23:50,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 07:23:50,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:50,549 INFO L514 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] [2022-01-31 07:23:50,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:50,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 07:23:50,766 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:50,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:50,766 INFO L85 PathProgramCache]: Analyzing trace with hash -445333921, now seen corresponding path program 1 times [2022-01-31 07:23:50,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:50,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654836621] [2022-01-31 07:23:50,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:50,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:50,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:50,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 07:23:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:23:51,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:51,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654836621] [2022-01-31 07:23:51,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654836621] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:51,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991513179] [2022-01-31 07:23:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:51,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:51,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:51,062 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:51,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 07:23:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:51,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-31 07:23:51,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:51,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 07:23:51,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 07:23:51,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 07:23:51,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 07:23:51,443 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-01-31 07:23:51,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 39 [2022-01-31 07:23:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:51,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:23:51,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991513179] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:51,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-31 07:23:51,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13, 14] total 32 [2022-01-31 07:23:51,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442153571] [2022-01-31 07:23:51,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:51,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 07:23:51,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:51,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 07:23:51,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2022-01-31 07:23:51,768 INFO L87 Difference]: Start difference. First operand 130 states and 170 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:23:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:52,102 INFO L93 Difference]: Finished difference Result 226 states and 304 transitions. [2022-01-31 07:23:52,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 07:23:52,103 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-01-31 07:23:52,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:52,106 INFO L225 Difference]: With dead ends: 226 [2022-01-31 07:23:52,106 INFO L226 Difference]: Without dead ends: 219 [2022-01-31 07:23:52,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=1349, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 07:23:52,107 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 78 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:52,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 797 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:23:52,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-31 07:23:52,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 154. [2022-01-31 07:23:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 133 states have (on average 1.3533834586466165) internal successors, (180), 135 states have internal predecessors, (180), 10 states have call successors, (10), 6 states have call predecessors, (10), 10 states have return successors, (13), 12 states have call predecessors, (13), 8 states have call successors, (13) [2022-01-31 07:23:52,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 203 transitions. [2022-01-31 07:23:52,113 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 203 transitions. Word has length 37 [2022-01-31 07:23:52,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:52,114 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 203 transitions. [2022-01-31 07:23:52,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:23:52,114 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 203 transitions. [2022-01-31 07:23:52,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 07:23:52,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:52,115 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 07:23:52,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:52,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 07:23:52,327 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:52,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:52,328 INFO L85 PathProgramCache]: Analyzing trace with hash -555556620, now seen corresponding path program 1 times [2022-01-31 07:23:52,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:52,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282253603] [2022-01-31 07:23:52,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:52,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:52,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:52,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 07:23:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 07:23:52,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:52,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282253603] [2022-01-31 07:23:52,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282253603] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:52,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485317939] [2022-01-31 07:23:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:52,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:52,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:52,438 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:52,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 07:23:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:52,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 07:23:52,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 07:23:52,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 07:23:52,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485317939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:52,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:52,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2022-01-31 07:23:52,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945245725] [2022-01-31 07:23:52,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:52,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 07:23:52,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:52,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 07:23:52,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-31 07:23:52,895 INFO L87 Difference]: Start difference. First operand 154 states and 203 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:54,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:54,222 INFO L93 Difference]: Finished difference Result 518 states and 721 transitions. [2022-01-31 07:23:54,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 07:23:54,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2022-01-31 07:23:54,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:54,224 INFO L225 Difference]: With dead ends: 518 [2022-01-31 07:23:54,224 INFO L226 Difference]: Without dead ends: 512 [2022-01-31 07:23:54,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=362, Invalid=1278, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 07:23:54,225 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 657 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:54,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [657 Valid, 145 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 07:23:54,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-31 07:23:54,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 168. [2022-01-31 07:23:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 145 states have (on average 1.3448275862068966) internal successors, (195), 147 states have internal predecessors, (195), 12 states have call successors, (12), 6 states have call predecessors, (12), 10 states have return successors, (20), 14 states have call predecessors, (20), 10 states have call successors, (20) [2022-01-31 07:23:54,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 227 transitions. [2022-01-31 07:23:54,232 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 227 transitions. Word has length 38 [2022-01-31 07:23:54,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:54,232 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 227 transitions. [2022-01-31 07:23:54,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:54,232 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 227 transitions. [2022-01-31 07:23:54,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 07:23:54,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:54,233 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 07:23:54,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:54,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 07:23:54,450 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:54,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:54,450 INFO L85 PathProgramCache]: Analyzing trace with hash 73266351, now seen corresponding path program 1 times [2022-01-31 07:23:54,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:54,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038213398] [2022-01-31 07:23:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:54,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:54,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:54,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 07:23:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:54,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 07:23:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 07:23:54,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:54,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038213398] [2022-01-31 07:23:54,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038213398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:54,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862908515] [2022-01-31 07:23:54,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:54,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:54,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:54,538 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:54,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 07:23:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:54,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 07:23:54,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:23:54,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:23:54,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862908515] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:54,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:23:54,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2022-01-31 07:23:54,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122269064] [2022-01-31 07:23:54,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:54,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:23:54,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:54,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:23:54,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-31 07:23:54,680 INFO L87 Difference]: Start difference. First operand 168 states and 227 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 07:23:54,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:54,695 INFO L93 Difference]: Finished difference Result 177 states and 240 transitions. [2022-01-31 07:23:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:23:54,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-01-31 07:23:54,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:54,696 INFO L225 Difference]: With dead ends: 177 [2022-01-31 07:23:54,696 INFO L226 Difference]: Without dead ends: 177 [2022-01-31 07:23:54,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-31 07:23:54,697 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 5 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:54,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 124 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:54,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-31 07:23:54,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 172. [2022-01-31 07:23:54,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 149 states have (on average 1.348993288590604) internal successors, (201), 151 states have internal predecessors, (201), 12 states have call successors, (12), 6 states have call predecessors, (12), 10 states have return successors, (20), 14 states have call predecessors, (20), 10 states have call successors, (20) [2022-01-31 07:23:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 233 transitions. [2022-01-31 07:23:54,700 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 233 transitions. Word has length 40 [2022-01-31 07:23:54,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:54,701 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 233 transitions. [2022-01-31 07:23:54,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 07:23:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 233 transitions. [2022-01-31 07:23:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 07:23:54,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:54,702 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 07:23:54,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:54,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 07:23:54,919 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:54,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:54,920 INFO L85 PathProgramCache]: Analyzing trace with hash -639283349, now seen corresponding path program 1 times [2022-01-31 07:23:54,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:54,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765501579] [2022-01-31 07:23:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:54,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:55,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:55,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 07:23:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:55,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:55,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765501579] [2022-01-31 07:23:55,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765501579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:55,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919697737] [2022-01-31 07:23:55,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:55,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:55,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:55,330 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:55,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 07:23:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:55,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 07:23:55,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 07:23:55,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:23:55,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919697737] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:55,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:55,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 9] total 29 [2022-01-31 07:23:55,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762413368] [2022-01-31 07:23:55,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:55,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 07:23:55,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:55,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 07:23:55,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-01-31 07:23:55,805 INFO L87 Difference]: Start difference. First operand 172 states and 233 transitions. Second operand has 29 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 28 states have internal predecessors, (72), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:23:58,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:58,065 INFO L93 Difference]: Finished difference Result 447 states and 626 transitions. [2022-01-31 07:23:58,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 07:23:58,066 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 28 states have internal predecessors, (72), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2022-01-31 07:23:58,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:58,067 INFO L225 Difference]: With dead ends: 447 [2022-01-31 07:23:58,067 INFO L226 Difference]: Without dead ends: 420 [2022-01-31 07:23:58,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=538, Invalid=3494, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 07:23:58,069 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 685 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2568 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 2568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:58,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 163 Invalid, 2821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 2568 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 07:23:58,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-01-31 07:23:58,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 218. [2022-01-31 07:23:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 193 states have (on average 1.3523316062176165) internal successors, (261), 195 states have internal predecessors, (261), 13 states have call successors, (13), 6 states have call predecessors, (13), 11 states have return successors, (21), 16 states have call predecessors, (21), 11 states have call successors, (21) [2022-01-31 07:23:58,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 295 transitions. [2022-01-31 07:23:58,076 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 295 transitions. Word has length 40 [2022-01-31 07:23:58,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:58,077 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 295 transitions. [2022-01-31 07:23:58,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 28 states have internal predecessors, (72), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:23:58,077 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 295 transitions. [2022-01-31 07:23:58,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 07:23:58,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:58,078 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 07:23:58,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:58,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:58,295 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:58,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:58,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1783818351, now seen corresponding path program 1 times [2022-01-31 07:23:58,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:58,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990391785] [2022-01-31 07:23:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:58,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:58,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:58,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 07:23:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 07:23:58,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:58,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990391785] [2022-01-31 07:23:58,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990391785] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:58,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072150903] [2022-01-31 07:23:58,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:58,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:58,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:58,703 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:23:58,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 07:23:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:58,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-31 07:23:58,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:59,209 INFO L353 Elim1Store]: treesize reduction 3, result has 78.6 percent of original size [2022-01-31 07:23:59,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2022-01-31 07:23:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:23:59,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:59,537 INFO L353 Elim1Store]: treesize reduction 23, result has 78.3 percent of original size [2022-01-31 07:23:59,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 90 [2022-01-31 07:24:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 07:24:00,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072150903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:00,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:00,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 13] total 39 [2022-01-31 07:24:00,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894972318] [2022-01-31 07:24:00,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:00,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 07:24:00,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:00,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 07:24:00,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1340, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 07:24:00,018 INFO L87 Difference]: Start difference. First operand 218 states and 295 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:24:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:01,526 INFO L93 Difference]: Finished difference Result 299 states and 409 transitions. [2022-01-31 07:24:01,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 07:24:01,527 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2022-01-31 07:24:01,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:01,528 INFO L225 Difference]: With dead ends: 299 [2022-01-31 07:24:01,528 INFO L226 Difference]: Without dead ends: 299 [2022-01-31 07:24:01,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=292, Invalid=2464, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 07:24:01,529 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 214 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2407 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:01,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 179 Invalid, 2469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2407 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 07:24:01,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-31 07:24:01,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 236. [2022-01-31 07:24:01,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 210 states have (on average 1.338095238095238) internal successors, (281), 211 states have internal predecessors, (281), 13 states have call successors, (13), 6 states have call predecessors, (13), 12 states have return successors, (23), 18 states have call predecessors, (23), 11 states have call successors, (23) [2022-01-31 07:24:01,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 317 transitions. [2022-01-31 07:24:01,534 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 317 transitions. Word has length 43 [2022-01-31 07:24:01,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:01,534 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 317 transitions. [2022-01-31 07:24:01,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:24:01,534 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 317 transitions. [2022-01-31 07:24:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 07:24:01,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:01,535 INFO L514 BasicCegarLoop]: trace histogram [2, 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] [2022-01-31 07:24:01,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 07:24:01,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-01-31 07:24:01,752 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:01,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:01,753 INFO L85 PathProgramCache]: Analyzing trace with hash -13133008, now seen corresponding path program 1 times [2022-01-31 07:24:01,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:01,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784292909] [2022-01-31 07:24:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:01,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:01,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:01,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 07:24:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 07:24:02,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:02,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784292909] [2022-01-31 07:24:02,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784292909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:02,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191209181] [2022-01-31 07:24:02,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:02,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:02,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:02,205 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:24:02,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 07:24:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:02,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-31 07:24:02,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:02,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 07:24:02,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 07:24:02,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 07:24:02,553 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-01-31 07:24:02,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 39 [2022-01-31 07:24:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 07:24:02,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:02,862 INFO L353 Elim1Store]: treesize reduction 20, result has 80.0 percent of original size [2022-01-31 07:24:02,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 87 [2022-01-31 07:24:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 07:24:03,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191209181] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:03,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:03,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 31 [2022-01-31 07:24:03,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75925452] [2022-01-31 07:24:03,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:03,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 07:24:03,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:03,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 07:24:03,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-01-31 07:24:03,183 INFO L87 Difference]: Start difference. First operand 236 states and 317 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 29 states have internal predecessors, (76), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 07:24:04,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:04,232 INFO L93 Difference]: Finished difference Result 302 states and 409 transitions. [2022-01-31 07:24:04,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 07:24:04,232 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 29 states have internal predecessors, (76), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2022-01-31 07:24:04,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:04,233 INFO L225 Difference]: With dead ends: 302 [2022-01-31 07:24:04,233 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 07:24:04,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 07:24:04,234 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 174 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:04,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 149 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1731 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 07:24:04,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 07:24:04,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 219. [2022-01-31 07:24:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 193 states have (on average 1.310880829015544) internal successors, (253), 194 states have internal predecessors, (253), 13 states have call successors, (13), 6 states have call predecessors, (13), 12 states have return successors, (23), 18 states have call predecessors, (23), 11 states have call successors, (23) [2022-01-31 07:24:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 289 transitions. [2022-01-31 07:24:04,242 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 289 transitions. Word has length 43 [2022-01-31 07:24:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:04,242 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 289 transitions. [2022-01-31 07:24:04,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 29 states have internal predecessors, (76), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 07:24:04,242 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 289 transitions. [2022-01-31 07:24:04,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 07:24:04,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:04,243 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 07:24:04,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 07:24:04,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:04,453 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:04,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:04,453 INFO L85 PathProgramCache]: Analyzing trace with hash -123906192, now seen corresponding path program 1 times [2022-01-31 07:24:04,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:04,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288231578] [2022-01-31 07:24:04,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:04,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:04,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:04,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 07:24:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:04,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 07:24:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:24:04,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:04,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288231578] [2022-01-31 07:24:04,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288231578] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:24:04,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:24:04,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 07:24:04,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028162180] [2022-01-31 07:24:04,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:24:04,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 07:24:04,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:04,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 07:24:04,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:24:04,489 INFO L87 Difference]: Start difference. First operand 219 states and 289 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 07:24:04,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:04,573 INFO L93 Difference]: Finished difference Result 221 states and 289 transitions. [2022-01-31 07:24:04,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 07:24:04,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-01-31 07:24:04,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:04,577 INFO L225 Difference]: With dead ends: 221 [2022-01-31 07:24:04,578 INFO L226 Difference]: Without dead ends: 220 [2022-01-31 07:24:04,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:24:04,578 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 59 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:04,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 67 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:24:04,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-31 07:24:04,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2022-01-31 07:24:04,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 192 states have (on average 1.3020833333333333) internal successors, (250), 193 states have internal predecessors, (250), 13 states have call successors, (13), 6 states have call predecessors, (13), 12 states have return successors, (23), 18 states have call predecessors, (23), 11 states have call successors, (23) [2022-01-31 07:24:04,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 286 transitions. [2022-01-31 07:24:04,582 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 286 transitions. Word has length 45 [2022-01-31 07:24:04,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:04,582 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 286 transitions. [2022-01-31 07:24:04,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 07:24:04,582 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 286 transitions. [2022-01-31 07:24:04,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 07:24:04,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:04,583 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-31 07:24:04,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 07:24:04,583 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:04,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:04,584 INFO L85 PathProgramCache]: Analyzing trace with hash 657769103, now seen corresponding path program 2 times [2022-01-31 07:24:04,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:04,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402405913] [2022-01-31 07:24:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:04,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:04,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:04,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 07:24:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:24:04,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:04,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402405913] [2022-01-31 07:24:04,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402405913] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:04,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558176930] [2022-01-31 07:24:04,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:24:04,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:04,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:04,828 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:24:04,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 07:24:04,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:24:04,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:24:04,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 07:24:04,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 07:24:05,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 07:24:05,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558176930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:05,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:05,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 25 [2022-01-31 07:24:05,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759056318] [2022-01-31 07:24:05,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:05,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 07:24:05,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:05,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 07:24:05,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-01-31 07:24:05,256 INFO L87 Difference]: Start difference. First operand 218 states and 286 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:24:09,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:09,587 INFO L93 Difference]: Finished difference Result 889 states and 1214 transitions. [2022-01-31 07:24:09,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 07:24:09,588 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2022-01-31 07:24:09,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:09,590 INFO L225 Difference]: With dead ends: 889 [2022-01-31 07:24:09,590 INFO L226 Difference]: Without dead ends: 889 [2022-01-31 07:24:09,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2211 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=968, Invalid=6864, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 07:24:09,592 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 1327 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4007 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 4606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 4007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:09,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1327 Valid, 293 Invalid, 4606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 4007 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 07:24:09,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-01-31 07:24:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 221. [2022-01-31 07:24:09,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 195 states have (on average 1.2974358974358975) internal successors, (253), 196 states have internal predecessors, (253), 13 states have call successors, (13), 6 states have call predecessors, (13), 12 states have return successors, (23), 18 states have call predecessors, (23), 11 states have call successors, (23) [2022-01-31 07:24:09,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 289 transitions. [2022-01-31 07:24:09,618 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 289 transitions. Word has length 44 [2022-01-31 07:24:09,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:09,618 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 289 transitions. [2022-01-31 07:24:09,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:24:09,618 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 289 transitions. [2022-01-31 07:24:09,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 07:24:09,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:09,619 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 07:24:09,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 07:24:09,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:09,826 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:09,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:09,826 INFO L85 PathProgramCache]: Analyzing trace with hash 722080383, now seen corresponding path program 1 times [2022-01-31 07:24:09,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:09,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901414217] [2022-01-31 07:24:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:09,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:09,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:09,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:09,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 07:24:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 07:24:10,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:10,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901414217] [2022-01-31 07:24:10,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901414217] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:10,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590945015] [2022-01-31 07:24:10,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:10,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:10,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:10,036 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:24:10,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 07:24:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:10,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 07:24:10,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:24:10,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 07:24:10,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590945015] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:10,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:10,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 29 [2022-01-31 07:24:10,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576800829] [2022-01-31 07:24:10,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:10,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 07:24:10,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:10,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 07:24:10,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-01-31 07:24:10,623 INFO L87 Difference]: Start difference. First operand 221 states and 289 transitions. Second operand has 29 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 28 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:24:12,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:12,365 INFO L93 Difference]: Finished difference Result 474 states and 646 transitions. [2022-01-31 07:24:12,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 07:24:12,365 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 28 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 46 [2022-01-31 07:24:12,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:12,367 INFO L225 Difference]: With dead ends: 474 [2022-01-31 07:24:12,367 INFO L226 Difference]: Without dead ends: 474 [2022-01-31 07:24:12,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=350, Invalid=2406, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 07:24:12,369 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 650 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2547 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 2547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:12,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 171 Invalid, 2754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 2547 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 07:24:12,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-31 07:24:12,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 244. [2022-01-31 07:24:12,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 213 states have (on average 1.3098591549295775) internal successors, (279), 219 states have internal predecessors, (279), 15 states have call successors, (15), 6 states have call predecessors, (15), 15 states have return successors, (36), 18 states have call predecessors, (36), 13 states have call successors, (36) [2022-01-31 07:24:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 330 transitions. [2022-01-31 07:24:12,381 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 330 transitions. Word has length 46 [2022-01-31 07:24:12,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:12,381 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 330 transitions. [2022-01-31 07:24:12,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 28 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:24:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 330 transitions. [2022-01-31 07:24:12,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 07:24:12,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:12,382 INFO L514 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] [2022-01-31 07:24:12,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 07:24:12,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-31 07:24:12,596 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:12,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:12,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1371524383, now seen corresponding path program 1 times [2022-01-31 07:24:12,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:12,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572645093] [2022-01-31 07:24:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:12,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:12,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:12,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 07:24:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:12,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 07:24:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:12,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 07:24:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:24:12,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:12,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572645093] [2022-01-31 07:24:12,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572645093] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:12,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082650989] [2022-01-31 07:24:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:12,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:12,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:12,718 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:24:12,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 07:24:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:12,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 07:24:12,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 07:24:12,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 07:24:13,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082650989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:13,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:13,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-01-31 07:24:13,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388794730] [2022-01-31 07:24:13,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:13,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 07:24:13,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:13,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 07:24:13,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-01-31 07:24:13,055 INFO L87 Difference]: Start difference. First operand 244 states and 330 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-31 07:24:13,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:13,550 INFO L93 Difference]: Finished difference Result 275 states and 368 transitions. [2022-01-31 07:24:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 07:24:13,551 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 49 [2022-01-31 07:24:13,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:13,555 INFO L225 Difference]: With dead ends: 275 [2022-01-31 07:24:13,555 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 07:24:13,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2022-01-31 07:24:13,556 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 126 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:13,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 106 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 07:24:13,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 07:24:13,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 244. [2022-01-31 07:24:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 213 states have (on average 1.3051643192488263) internal successors, (278), 218 states have internal predecessors, (278), 15 states have call successors, (15), 6 states have call predecessors, (15), 15 states have return successors, (36), 19 states have call predecessors, (36), 13 states have call successors, (36) [2022-01-31 07:24:13,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 329 transitions. [2022-01-31 07:24:13,560 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 329 transitions. Word has length 49 [2022-01-31 07:24:13,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:13,560 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 329 transitions. [2022-01-31 07:24:13,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-31 07:24:13,560 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 329 transitions. [2022-01-31 07:24:13,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 07:24:13,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:13,561 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-31 07:24:13,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 07:24:13,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:13,779 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:13,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:13,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2031468596, now seen corresponding path program 3 times [2022-01-31 07:24:13,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:13,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547244791] [2022-01-31 07:24:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:13,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:13,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:13,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 07:24:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:24:14,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:14,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547244791] [2022-01-31 07:24:14,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547244791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:14,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110394465] [2022-01-31 07:24:14,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:24:14,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:14,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:14,101 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:24:14,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 07:24:14,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 07:24:14,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:24:14,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-31 07:24:14,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:14,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 07:24:14,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 07:24:14,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 07:24:14,733 INFO L353 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-01-31 07:24:14,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 46 [2022-01-31 07:24:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 07:24:14,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:15,003 INFO L353 Elim1Store]: treesize reduction 26, result has 76.8 percent of original size [2022-01-31 07:24:15,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-01-31 07:24:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 07:24:15,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110394465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:15,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:15,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 11] total 31 [2022-01-31 07:24:15,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329211701] [2022-01-31 07:24:15,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:15,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 07:24:15,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:15,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 07:24:15,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-01-31 07:24:15,395 INFO L87 Difference]: Start difference. First operand 244 states and 329 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:24:17,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:17,003 INFO L93 Difference]: Finished difference Result 427 states and 576 transitions. [2022-01-31 07:24:17,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 07:24:17,004 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-01-31 07:24:17,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:17,007 INFO L225 Difference]: With dead ends: 427 [2022-01-31 07:24:17,007 INFO L226 Difference]: Without dead ends: 427 [2022-01-31 07:24:17,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=2274, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 07:24:17,008 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 225 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2416 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:17,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 164 Invalid, 2684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2416 Invalid, 0 Unknown, 190 Unchecked, 1.2s Time] [2022-01-31 07:24:17,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-01-31 07:24:17,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 249. [2022-01-31 07:24:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 218 states have (on average 1.3027522935779816) internal successors, (284), 222 states have internal predecessors, (284), 15 states have call successors, (15), 6 states have call predecessors, (15), 15 states have return successors, (36), 20 states have call predecessors, (36), 13 states have call successors, (36) [2022-01-31 07:24:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 335 transitions. [2022-01-31 07:24:17,029 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 335 transitions. Word has length 47 [2022-01-31 07:24:17,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:17,029 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 335 transitions. [2022-01-31 07:24:17,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:24:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 335 transitions. [2022-01-31 07:24:17,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 07:24:17,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:17,032 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 07:24:17,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 07:24:17,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:17,239 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:17,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:17,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1794999073, now seen corresponding path program 2 times [2022-01-31 07:24:17,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:17,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553844870] [2022-01-31 07:24:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:17,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:17,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:17,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 07:24:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:24:17,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:17,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553844870] [2022-01-31 07:24:17,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553844870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:17,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686308492] [2022-01-31 07:24:17,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:24:17,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:17,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:17,608 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:24:17,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 07:24:17,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:24:17,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:24:17,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 07:24:17,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 07:24:17,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 07:24:18,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686308492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:18,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:18,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 11] total 36 [2022-01-31 07:24:18,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50222246] [2022-01-31 07:24:18,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:18,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 07:24:18,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:18,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 07:24:18,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 07:24:18,149 INFO L87 Difference]: Start difference. First operand 249 states and 335 transitions. Second operand has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:24:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:25,105 INFO L93 Difference]: Finished difference Result 1282 states and 1768 transitions. [2022-01-31 07:24:25,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 07:24:25,105 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 48 [2022-01-31 07:24:25,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:25,109 INFO L225 Difference]: With dead ends: 1282 [2022-01-31 07:24:25,109 INFO L226 Difference]: Without dead ends: 1282 [2022-01-31 07:24:25,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3065 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1111, Invalid=9191, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 07:24:25,111 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 1269 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 8281 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 8839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 8281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:25,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1269 Valid, 305 Invalid, 8839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 8281 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-01-31 07:24:25,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2022-01-31 07:24:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 237. [2022-01-31 07:24:25,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 207 states have (on average 1.3043478260869565) internal successors, (270), 212 states have internal predecessors, (270), 14 states have call successors, (14), 6 states have call predecessors, (14), 15 states have return successors, (30), 18 states have call predecessors, (30), 12 states have call successors, (30) [2022-01-31 07:24:25,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 314 transitions. [2022-01-31 07:24:25,121 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 314 transitions. Word has length 48 [2022-01-31 07:24:25,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:25,121 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 314 transitions. [2022-01-31 07:24:25,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:24:25,122 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 314 transitions. [2022-01-31 07:24:25,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 07:24:25,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:25,122 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2022-01-31 07:24:25,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 07:24:25,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:25,339 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:25,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:25,340 INFO L85 PathProgramCache]: Analyzing trace with hash 775750784, now seen corresponding path program 2 times [2022-01-31 07:24:25,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:25,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140502325] [2022-01-31 07:24:25,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:25,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:25,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:25,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 07:24:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 07:24:25,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:25,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140502325] [2022-01-31 07:24:25,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140502325] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:25,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106238817] [2022-01-31 07:24:25,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:24:25,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:25,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:25,440 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:24:25,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 07:24:25,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:24:25,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:24:25,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 07:24:25,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 07:24:25,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-31 07:24:25,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106238817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:25,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:25,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 22 [2022-01-31 07:24:25,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15048188] [2022-01-31 07:24:25,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:25,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 07:24:25,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:25,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 07:24:25,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2022-01-31 07:24:25,807 INFO L87 Difference]: Start difference. First operand 237 states and 314 transitions. Second operand has 22 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:24:26,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:26,698 INFO L93 Difference]: Finished difference Result 304 states and 404 transitions. [2022-01-31 07:24:26,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 07:24:26,698 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-01-31 07:24:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:26,699 INFO L225 Difference]: With dead ends: 304 [2022-01-31 07:24:26,699 INFO L226 Difference]: Without dead ends: 286 [2022-01-31 07:24:26,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=1331, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 07:24:26,700 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 157 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:26,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 163 Invalid, 1907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 07:24:26,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-31 07:24:26,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 253. [2022-01-31 07:24:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 224 states have (on average 1.3080357142857142) internal successors, (293), 228 states have internal predecessors, (293), 14 states have call successors, (14), 6 states have call predecessors, (14), 14 states have return successors, (27), 18 states have call predecessors, (27), 12 states have call successors, (27) [2022-01-31 07:24:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 334 transitions. [2022-01-31 07:24:26,705 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 334 transitions. Word has length 49 [2022-01-31 07:24:26,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:26,705 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 334 transitions. [2022-01-31 07:24:26,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:24:26,705 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 334 transitions. [2022-01-31 07:24:26,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 07:24:26,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:26,706 INFO L514 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] [2022-01-31 07:24:26,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-01-31 07:24:26,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-31 07:24:26,919 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:26,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:26,920 INFO L85 PathProgramCache]: Analyzing trace with hash 472805918, now seen corresponding path program 1 times [2022-01-31 07:24:26,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:26,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820141093] [2022-01-31 07:24:26,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:26,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:27,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:27,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 07:24:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:27,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 07:24:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:27,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 07:24:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 07:24:27,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:27,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820141093] [2022-01-31 07:24:27,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820141093] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:27,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182011400] [2022-01-31 07:24:27,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:27,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:27,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:27,061 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:24:27,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 07:24:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:27,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 07:24:27,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 07:24:27,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:24:27,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182011400] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:27,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:27,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 21 [2022-01-31 07:24:27,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769986844] [2022-01-31 07:24:27,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:27,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 07:24:27,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:27,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 07:24:27,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-31 07:24:27,429 INFO L87 Difference]: Start difference. First operand 253 states and 334 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 7 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 07:24:28,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:28,321 INFO L93 Difference]: Finished difference Result 330 states and 429 transitions. [2022-01-31 07:24:28,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 07:24:28,322 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 7 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 52 [2022-01-31 07:24:28,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:28,323 INFO L225 Difference]: With dead ends: 330 [2022-01-31 07:24:28,323 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 07:24:28,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=338, Invalid=1554, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 07:24:28,324 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 280 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:28,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 112 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 07:24:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 07:24:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 240. [2022-01-31 07:24:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 215 states have (on average 1.302325581395349) internal successors, (280), 219 states have internal predecessors, (280), 11 states have call successors, (11), 6 states have call predecessors, (11), 13 states have return successors, (21), 14 states have call predecessors, (21), 9 states have call successors, (21) [2022-01-31 07:24:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 312 transitions. [2022-01-31 07:24:28,328 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 312 transitions. Word has length 52 [2022-01-31 07:24:28,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:28,328 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 312 transitions. [2022-01-31 07:24:28,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 7 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 07:24:28,328 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 312 transitions. [2022-01-31 07:24:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 07:24:28,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:28,329 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 07:24:28,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 07:24:28,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-31 07:24:28,540 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:28,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1965111199, now seen corresponding path program 1 times [2022-01-31 07:24:28,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:28,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776609572] [2022-01-31 07:24:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:28,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:28,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:28,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 07:24:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:28,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 07:24:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:28,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 07:24:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:24:28,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:28,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776609572] [2022-01-31 07:24:28,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776609572] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:28,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668920438] [2022-01-31 07:24:28,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:28,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:28,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:28,895 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:24:28,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 07:24:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:28,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 07:24:28,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:24:29,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 07:24:29,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668920438] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:29,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:29,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 9] total 29 [2022-01-31 07:24:29,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629374161] [2022-01-31 07:24:29,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:29,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 07:24:29,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:29,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 07:24:29,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-01-31 07:24:29,626 INFO L87 Difference]: Start difference. First operand 240 states and 312 transitions. Second operand has 29 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 7 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-31 07:24:31,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:31,150 INFO L93 Difference]: Finished difference Result 440 states and 575 transitions. [2022-01-31 07:24:31,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 07:24:31,150 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 7 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 54 [2022-01-31 07:24:31,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:31,152 INFO L225 Difference]: With dead ends: 440 [2022-01-31 07:24:31,152 INFO L226 Difference]: Without dead ends: 429 [2022-01-31 07:24:31,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=291, Invalid=2361, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 07:24:31,153 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 400 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:31,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 129 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1594 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 07:24:31,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-31 07:24:31,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 241. [2022-01-31 07:24:31,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 216 states have (on average 1.2962962962962963) internal successors, (280), 220 states have internal predecessors, (280), 11 states have call successors, (11), 6 states have call predecessors, (11), 13 states have return successors, (21), 14 states have call predecessors, (21), 9 states have call successors, (21) [2022-01-31 07:24:31,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 312 transitions. [2022-01-31 07:24:31,158 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 312 transitions. Word has length 54 [2022-01-31 07:24:31,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:31,158 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 312 transitions. [2022-01-31 07:24:31,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 7 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-31 07:24:31,158 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 312 transitions. [2022-01-31 07:24:31,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 07:24:31,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:31,159 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-01-31 07:24:31,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 07:24:31,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:31,376 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:31,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:31,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1185289662, now seen corresponding path program 3 times [2022-01-31 07:24:31,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:31,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22638969] [2022-01-31 07:24:31,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:31,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:31,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:31,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 07:24:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 07:24:31,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:31,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22638969] [2022-01-31 07:24:31,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22638969] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:31,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037272020] [2022-01-31 07:24:31,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:24:31,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:31,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:31,786 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:24:31,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 07:24:32,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 07:24:32,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:24:32,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-31 07:24:32,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:32,253 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 07:24:32,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-01-31 07:24:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-31 07:24:32,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:32,501 INFO L353 Elim1Store]: treesize reduction 24, result has 76.0 percent of original size [2022-01-31 07:24:32,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 83 [2022-01-31 07:24:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-31 07:24:32,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037272020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:32,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:32,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 9] total 31 [2022-01-31 07:24:32,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610651036] [2022-01-31 07:24:32,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:32,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 07:24:32,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:32,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 07:24:32,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-01-31 07:24:32,713 INFO L87 Difference]: Start difference. First operand 241 states and 312 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 07:24:34,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:34,328 INFO L93 Difference]: Finished difference Result 415 states and 547 transitions. [2022-01-31 07:24:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 07:24:34,328 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-01-31 07:24:34,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:34,329 INFO L225 Difference]: With dead ends: 415 [2022-01-31 07:24:34,329 INFO L226 Difference]: Without dead ends: 415 [2022-01-31 07:24:34,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=324, Invalid=2646, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 07:24:34,334 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 351 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2492 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 2612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:34,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 147 Invalid, 2612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2492 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 07:24:34,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-01-31 07:24:34,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 243. [2022-01-31 07:24:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 218 states have (on average 1.2844036697247707) internal successors, (280), 222 states have internal predecessors, (280), 11 states have call successors, (11), 6 states have call predecessors, (11), 13 states have return successors, (21), 14 states have call predecessors, (21), 9 states have call successors, (21) [2022-01-31 07:24:34,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 312 transitions. [2022-01-31 07:24:34,339 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 312 transitions. Word has length 53 [2022-01-31 07:24:34,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:34,339 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 312 transitions. [2022-01-31 07:24:34,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 07:24:34,339 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 312 transitions. [2022-01-31 07:24:34,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 07:24:34,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:34,341 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-01-31 07:24:34,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-31 07:24:34,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:34,541 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:34,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:34,542 INFO L85 PathProgramCache]: Analyzing trace with hash 106103072, now seen corresponding path program 4 times [2022-01-31 07:24:34,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:34,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215215196] [2022-01-31 07:24:34,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:34,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:34,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:34,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 07:24:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 07:24:34,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:34,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215215196] [2022-01-31 07:24:34,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215215196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:34,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934142957] [2022-01-31 07:24:34,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:24:34,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:34,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:34,979 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:24:34,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 07:24:35,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:24:35,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:24:35,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2022-01-31 07:24:35,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:35,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:24:35,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 07:24:35,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 07:24:35,563 INFO L353 Elim1Store]: treesize reduction 27, result has 57.8 percent of original size [2022-01-31 07:24:35,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 72 [2022-01-31 07:24:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:24:35,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 07:24:36,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934142957] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:36,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:36,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 18] total 45 [2022-01-31 07:24:36,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039139613] [2022-01-31 07:24:36,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:36,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 07:24:36,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:36,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 07:24:36,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1808, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 07:24:36,279 INFO L87 Difference]: Start difference. First operand 243 states and 312 transitions. Second operand has 45 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 43 states have internal predecessors, (102), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:24:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:38,295 INFO L93 Difference]: Finished difference Result 330 states and 428 transitions. [2022-01-31 07:24:38,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 07:24:38,296 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 43 states have internal predecessors, (102), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2022-01-31 07:24:38,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:38,297 INFO L225 Difference]: With dead ends: 330 [2022-01-31 07:24:38,297 INFO L226 Difference]: Without dead ends: 330 [2022-01-31 07:24:38,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=462, Invalid=4368, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 07:24:38,298 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 270 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 2574 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:38,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 174 Invalid, 2667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2574 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 07:24:38,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-01-31 07:24:38,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 252. [2022-01-31 07:24:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 226 states have (on average 1.2787610619469028) internal successors, (289), 230 states have internal predecessors, (289), 11 states have call successors, (11), 6 states have call predecessors, (11), 14 states have return successors, (22), 15 states have call predecessors, (22), 9 states have call successors, (22) [2022-01-31 07:24:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 322 transitions. [2022-01-31 07:24:38,302 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 322 transitions. Word has length 53 [2022-01-31 07:24:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:38,302 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 322 transitions. [2022-01-31 07:24:38,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 43 states have internal predecessors, (102), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:24:38,303 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 322 transitions. [2022-01-31 07:24:38,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 07:24:38,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:38,303 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-01-31 07:24:38,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-31 07:24:38,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:38,521 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:38,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:38,522 INFO L85 PathProgramCache]: Analyzing trace with hash 861308674, now seen corresponding path program 5 times [2022-01-31 07:24:38,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:38,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727699885] [2022-01-31 07:24:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:38,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:38,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:38,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 07:24:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 07:24:38,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:38,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727699885] [2022-01-31 07:24:38,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727699885] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:38,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566920706] [2022-01-31 07:24:38,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:24:38,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:38,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:38,969 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:24:38,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-31 07:24:40,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 07:24:40,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:24:40,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-31 07:24:40,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:40,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 07:24:40,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 07:24:40,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 07:24:40,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 07:24:40,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 07:24:40,833 INFO L353 Elim1Store]: treesize reduction 19, result has 70.3 percent of original size [2022-01-31 07:24:40,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 80 [2022-01-31 07:24:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 07:24:40,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 07:24:41,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566920706] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:41,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:41,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 16] total 45 [2022-01-31 07:24:41,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849887840] [2022-01-31 07:24:41,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:41,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 07:24:41,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:41,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 07:24:41,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1788, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 07:24:41,374 INFO L87 Difference]: Start difference. First operand 252 states and 322 transitions. Second operand has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 43 states have internal predecessors, (105), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:24:43,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:43,914 INFO L93 Difference]: Finished difference Result 536 states and 698 transitions. [2022-01-31 07:24:43,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 07:24:43,914 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 43 states have internal predecessors, (105), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2022-01-31 07:24:43,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:43,916 INFO L225 Difference]: With dead ends: 536 [2022-01-31 07:24:43,916 INFO L226 Difference]: Without dead ends: 536 [2022-01-31 07:24:43,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=558, Invalid=4992, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 07:24:43,916 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 304 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 3862 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 3986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:43,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 205 Invalid, 3986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3862 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 07:24:43,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-31 07:24:43,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 266. [2022-01-31 07:24:43,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 238 states have (on average 1.2773109243697478) internal successors, (304), 243 states have internal predecessors, (304), 11 states have call successors, (11), 6 states have call predecessors, (11), 16 states have return successors, (24), 16 states have call predecessors, (24), 9 states have call successors, (24) [2022-01-31 07:24:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 339 transitions. [2022-01-31 07:24:43,922 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 339 transitions. Word has length 53 [2022-01-31 07:24:43,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:43,922 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 339 transitions. [2022-01-31 07:24:43,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 43 states have internal predecessors, (105), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:24:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 339 transitions. [2022-01-31 07:24:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 07:24:43,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:43,923 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-01-31 07:24:43,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-31 07:24:44,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-31 07:24:44,128 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:44,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:44,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1749377510, now seen corresponding path program 6 times [2022-01-31 07:24:44,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:44,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598499762] [2022-01-31 07:24:44,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:44,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:44,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:44,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 07:24:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 07:24:44,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:44,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598499762] [2022-01-31 07:24:44,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598499762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:44,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850810584] [2022-01-31 07:24:44,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 07:24:44,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:44,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:44,528 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:24:44,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-31 07:24:44,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 07:24:44,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:24:44,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2022-01-31 07:24:44,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:44,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:24:45,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 07:24:45,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 07:24:45,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 07:24:45,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 07:24:45,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 07:24:45,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 39 [2022-01-31 07:24:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:24:45,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 07:24:45,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850810584] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:45,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:45,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 18] total 39 [2022-01-31 07:24:45,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845039053] [2022-01-31 07:24:45,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:45,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 07:24:45,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:45,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 07:24:45,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 07:24:45,862 INFO L87 Difference]: Start difference. First operand 266 states and 339 transitions. Second operand has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 37 states have internal predecessors, (90), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:24:47,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:47,485 INFO L93 Difference]: Finished difference Result 334 states and 429 transitions. [2022-01-31 07:24:47,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 07:24:47,485 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 37 states have internal predecessors, (90), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-01-31 07:24:47,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:47,486 INFO L225 Difference]: With dead ends: 334 [2022-01-31 07:24:47,486 INFO L226 Difference]: Without dead ends: 334 [2022-01-31 07:24:47,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 88 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=333, Invalid=3207, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 07:24:47,487 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 247 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 2302 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:47,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 159 Invalid, 2381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2302 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 07:24:47,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-01-31 07:24:47,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 277. [2022-01-31 07:24:47,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 248 states have (on average 1.2741935483870968) internal successors, (316), 253 states have internal predecessors, (316), 11 states have call successors, (11), 6 states have call predecessors, (11), 17 states have return successors, (25), 17 states have call predecessors, (25), 9 states have call successors, (25) [2022-01-31 07:24:47,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 352 transitions. [2022-01-31 07:24:47,491 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 352 transitions. Word has length 53 [2022-01-31 07:24:47,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:47,491 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 352 transitions. [2022-01-31 07:24:47,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 37 states have internal predecessors, (90), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:24:47,492 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 352 transitions. [2022-01-31 07:24:47,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 07:24:47,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:47,492 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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] [2022-01-31 07:24:47,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-31 07:24:47,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-01-31 07:24:47,697 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:47,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:47,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1941560433, now seen corresponding path program 2 times [2022-01-31 07:24:47,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:47,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424518429] [2022-01-31 07:24:47,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:47,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:47,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:47,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 07:24:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:48,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 07:24:48,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:48,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 07:24:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 07:24:48,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:48,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424518429] [2022-01-31 07:24:48,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424518429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:48,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413846918] [2022-01-31 07:24:48,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:24:48,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:48,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:48,073 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:24:48,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-31 07:24:48,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:24:48,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:24:48,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-31 07:24:48,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:48,381 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 07:24:48,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-01-31 07:24:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 07:24:48,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:48,598 INFO L353 Elim1Store]: treesize reduction 24, result has 76.0 percent of original size [2022-01-31 07:24:48,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 83 [2022-01-31 07:24:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 07:24:48,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413846918] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:48,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:48,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 27 [2022-01-31 07:24:48,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417158982] [2022-01-31 07:24:48,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:48,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 07:24:48,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:48,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 07:24:48,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-01-31 07:24:48,850 INFO L87 Difference]: Start difference. First operand 277 states and 352 transitions. Second operand has 27 states, 25 states have (on average 3.04) internal successors, (76), 26 states have internal predecessors, (76), 7 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 07:24:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:49,473 INFO L93 Difference]: Finished difference Result 363 states and 469 transitions. [2022-01-31 07:24:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 07:24:49,473 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.04) internal successors, (76), 26 states have internal predecessors, (76), 7 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 57 [2022-01-31 07:24:49,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:49,474 INFO L225 Difference]: With dead ends: 363 [2022-01-31 07:24:49,474 INFO L226 Difference]: Without dead ends: 361 [2022-01-31 07:24:49,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 07:24:49,475 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 259 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:49,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 109 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 07:24:49,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-01-31 07:24:49,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 288. [2022-01-31 07:24:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 256 states have (on average 1.265625) internal successors, (324), 262 states have internal predecessors, (324), 12 states have call successors, (12), 6 states have call predecessors, (12), 19 states have return successors, (30), 19 states have call predecessors, (30), 10 states have call successors, (30) [2022-01-31 07:24:49,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 366 transitions. [2022-01-31 07:24:49,480 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 366 transitions. Word has length 57 [2022-01-31 07:24:49,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:49,480 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 366 transitions. [2022-01-31 07:24:49,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.04) internal successors, (76), 26 states have internal predecessors, (76), 7 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 07:24:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 366 transitions. [2022-01-31 07:24:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 07:24:49,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:49,481 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-31 07:24:49,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-31 07:24:49,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-01-31 07:24:49,699 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:49,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:49,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1182852295, now seen corresponding path program 4 times [2022-01-31 07:24:49,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:49,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391980077] [2022-01-31 07:24:49,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:49,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:49,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:49,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 07:24:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 07:24:49,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:49,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391980077] [2022-01-31 07:24:49,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391980077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:49,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710855470] [2022-01-31 07:24:49,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:24:49,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:49,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:49,843 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:24:49,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-31 07:24:50,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:24:50,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:24:50,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 55 conjunts are in the unsatisfiable core [2022-01-31 07:24:50,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:50,405 INFO L353 Elim1Store]: treesize reduction 7, result has 56.3 percent of original size [2022-01-31 07:24:50,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2022-01-31 07:24:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 07:24:50,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:50,769 INFO L353 Elim1Store]: treesize reduction 27, result has 73.8 percent of original size [2022-01-31 07:24:50,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 83 [2022-01-31 07:24:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 07:24:51,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710855470] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:51,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:51,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 14] total 35 [2022-01-31 07:24:51,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568370876] [2022-01-31 07:24:51,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:51,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 07:24:51,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:51,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 07:24:51,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 07:24:51,319 INFO L87 Difference]: Start difference. First operand 288 states and 366 transitions. Second operand has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:24:55,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:55,182 INFO L93 Difference]: Finished difference Result 863 states and 1127 transitions. [2022-01-31 07:24:55,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 07:24:55,182 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-01-31 07:24:55,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:55,185 INFO L225 Difference]: With dead ends: 863 [2022-01-31 07:24:55,185 INFO L226 Difference]: Without dead ends: 783 [2022-01-31 07:24:55,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=606, Invalid=6036, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 07:24:55,186 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 587 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 4525 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 4757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 4525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:55,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 205 Invalid, 4757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 4525 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 07:24:55,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-01-31 07:24:55,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 380. [2022-01-31 07:24:55,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 345 states have (on average 1.2492753623188406) internal successors, (431), 346 states have internal predecessors, (431), 13 states have call successors, (13), 6 states have call predecessors, (13), 21 states have return successors, (43), 27 states have call predecessors, (43), 11 states have call successors, (43) [2022-01-31 07:24:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 487 transitions. [2022-01-31 07:24:55,192 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 487 transitions. Word has length 55 [2022-01-31 07:24:55,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:55,193 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 487 transitions. [2022-01-31 07:24:55,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:24:55,193 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 487 transitions. [2022-01-31 07:24:55,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 07:24:55,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:55,194 INFO L514 BasicCegarLoop]: trace histogram [2, 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] [2022-01-31 07:24:55,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-31 07:24:55,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:55,412 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:55,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:55,412 INFO L85 PathProgramCache]: Analyzing trace with hash -847141523, now seen corresponding path program 1 times [2022-01-31 07:24:55,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:55,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032016116] [2022-01-31 07:24:55,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:55,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:55,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:55,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 07:24:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:55,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 07:24:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:55,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 07:24:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 07:24:55,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:55,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032016116] [2022-01-31 07:24:55,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032016116] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:55,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87320088] [2022-01-31 07:24:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:55,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:55,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:55,800 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:24:55,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-31 07:24:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:55,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-31 07:24:55,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:56,867 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0.base_BEFORE_CALL_13 Int) (v_main_~pat~0.base_BEFORE_CALL_13 Int) (v_main_~pat~0.offset_BEFORE_CALL_19 Int)) (= (select (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_13) 0) (select (select |c_#memory_int| v_main_~pat~0.base_BEFORE_CALL_13) (+ v_main_~pat~0.offset_BEFORE_CALL_19 4)))) is different from true [2022-01-31 07:24:59,939 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0.base_BEFORE_CALL_14 Int) (v_main_~pat~0.base_BEFORE_CALL_14 Int) (v_main_~pat~0.offset_BEFORE_CALL_20 Int)) (= (select (select |c_#memory_int| v_main_~pat~0.base_BEFORE_CALL_14) (+ v_main_~pat~0.offset_BEFORE_CALL_20 4)) (select (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_14) 0))) is different from true [2022-01-31 07:25:00,879 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-01-31 07:25:00,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2022-01-31 07:25:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 2 not checked. [2022-01-31 07:25:00,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:25:01,121 INFO L353 Elim1Store]: treesize reduction 25, result has 76.4 percent of original size [2022-01-31 07:25:01,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 88 [2022-01-31 07:25:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 07:25:01,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87320088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:25:01,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:25:01,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 14] total 41 [2022-01-31 07:25:01,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152347600] [2022-01-31 07:25:01,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:25:01,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 07:25:01,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:25:01,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 07:25:01,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1347, Unknown=2, NotChecked=150, Total=1640 [2022-01-31 07:25:01,540 INFO L87 Difference]: Start difference. First operand 380 states and 487 transitions. Second operand has 41 states, 40 states have (on average 2.975) internal successors, (119), 38 states have internal predecessors, (119), 10 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 07:25:30,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:25:30,026 INFO L93 Difference]: Finished difference Result 504 states and 648 transitions. [2022-01-31 07:25:30,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 07:25:30,027 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.975) internal successors, (119), 38 states have internal predecessors, (119), 10 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) Word has length 58 [2022-01-31 07:25:30,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:25:30,028 INFO L225 Difference]: With dead ends: 504 [2022-01-31 07:25:30,028 INFO L226 Difference]: Without dead ends: 504 [2022-01-31 07:25:30,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 99 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=315, Invalid=2977, Unknown=22, NotChecked=226, Total=3540 [2022-01-31 07:25:30,029 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 314 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:25:30,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 196 Invalid, 2469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2076 Invalid, 0 Unknown, 302 Unchecked, 1.0s Time] [2022-01-31 07:25:30,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-31 07:25:30,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 401. [2022-01-31 07:25:30,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 361 states have (on average 1.2437673130193905) internal successors, (449), 363 states have internal predecessors, (449), 15 states have call successors, (15), 9 states have call predecessors, (15), 24 states have return successors, (45), 28 states have call predecessors, (45), 13 states have call successors, (45) [2022-01-31 07:25:30,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 509 transitions. [2022-01-31 07:25:30,035 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 509 transitions. Word has length 58 [2022-01-31 07:25:30,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:25:30,035 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 509 transitions. [2022-01-31 07:25:30,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.975) internal successors, (119), 38 states have internal predecessors, (119), 10 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 07:25:30,036 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 509 transitions. [2022-01-31 07:25:30,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 07:25:30,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:25:30,037 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-31 07:25:30,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-31 07:25:30,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-31 07:25:30,243 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:25:30,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:25:30,244 INFO L85 PathProgramCache]: Analyzing trace with hash -682072328, now seen corresponding path program 7 times [2022-01-31 07:25:30,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:25:30,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427287170] [2022-01-31 07:25:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:25:30,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:25:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:30,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:25:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:30,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 07:25:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 07:25:30,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:25:30,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427287170] [2022-01-31 07:25:30,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427287170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:25:30,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023158833] [2022-01-31 07:25:30,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 07:25:30,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:25:30,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:25:30,480 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:25:30,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-31 07:25:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:30,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-31 07:25:30,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:25:30,897 INFO L353 Elim1Store]: treesize reduction 187, result has 15.4 percent of original size [2022-01-31 07:25:30,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 68 [2022-01-31 07:25:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 07:25:30,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:25:31,191 INFO L353 Elim1Store]: treesize reduction 30, result has 73.2 percent of original size [2022-01-31 07:25:31,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 89 [2022-01-31 07:25:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 07:25:31,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023158833] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:25:31,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:25:31,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 32 [2022-01-31 07:25:31,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143951130] [2022-01-31 07:25:31,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:25:31,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 07:25:31,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:25:31,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 07:25:31,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=913, Unknown=0, NotChecked=0, Total=992 [2022-01-31 07:25:31,574 INFO L87 Difference]: Start difference. First operand 401 states and 509 transitions. Second operand has 32 states, 32 states have (on average 2.71875) internal successors, (87), 31 states have internal predecessors, (87), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:25:34,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:25:34,360 INFO L93 Difference]: Finished difference Result 716 states and 928 transitions. [2022-01-31 07:25:34,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 07:25:34,360 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 31 states have internal predecessors, (87), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-01-31 07:25:34,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:25:34,362 INFO L225 Difference]: With dead ends: 716 [2022-01-31 07:25:34,362 INFO L226 Difference]: Without dead ends: 698 [2022-01-31 07:25:34,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=329, Invalid=3453, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 07:25:34,366 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 559 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4106 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 4272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 4106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:25:34,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 215 Invalid, 4272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 4106 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 07:25:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-01-31 07:25:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 378. [2022-01-31 07:25:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 336 states have (on average 1.255952380952381) internal successors, (422), 344 states have internal predecessors, (422), 15 states have call successors, (15), 9 states have call predecessors, (15), 26 states have return successors, (43), 24 states have call predecessors, (43), 13 states have call successors, (43) [2022-01-31 07:25:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 480 transitions. [2022-01-31 07:25:34,377 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 480 transitions. Word has length 56 [2022-01-31 07:25:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:25:34,377 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 480 transitions. [2022-01-31 07:25:34,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 31 states have internal predecessors, (87), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:25:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 480 transitions. [2022-01-31 07:25:34,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 07:25:34,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:25:34,378 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 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] [2022-01-31 07:25:34,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-31 07:25:34,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-31 07:25:34,596 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:25:34,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:25:34,596 INFO L85 PathProgramCache]: Analyzing trace with hash 599362253, now seen corresponding path program 1 times [2022-01-31 07:25:34,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:25:34,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805863793] [2022-01-31 07:25:34,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:25:34,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:25:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:34,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:25:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:34,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 07:25:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:25:34,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:25:34,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805863793] [2022-01-31 07:25:34,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805863793] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:25:34,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061853535] [2022-01-31 07:25:34,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:25:34,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:25:34,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:25:34,706 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:25:34,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-31 07:25:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:34,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 07:25:34,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:25:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 07:25:35,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:25:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 07:25:35,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061853535] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:25:35,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:25:35,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 28 [2022-01-31 07:25:35,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917438207] [2022-01-31 07:25:35,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:25:35,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 07:25:35,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:25:35,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 07:25:35,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2022-01-31 07:25:35,244 INFO L87 Difference]: Start difference. First operand 378 states and 480 transitions. Second operand has 28 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:25:36,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:25:36,442 INFO L93 Difference]: Finished difference Result 486 states and 612 transitions. [2022-01-31 07:25:36,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 07:25:36,443 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-01-31 07:25:36,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:25:36,444 INFO L225 Difference]: With dead ends: 486 [2022-01-31 07:25:36,444 INFO L226 Difference]: Without dead ends: 443 [2022-01-31 07:25:36,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=239, Invalid=2413, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 07:25:36,445 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 195 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 07:25:36,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 170 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 07:25:36,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-01-31 07:25:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 385. [2022-01-31 07:25:36,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 345 states have (on average 1.2608695652173914) internal successors, (435), 351 states have internal predecessors, (435), 15 states have call successors, (15), 9 states have call predecessors, (15), 24 states have return successors, (38), 24 states have call predecessors, (38), 13 states have call successors, (38) [2022-01-31 07:25:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 488 transitions. [2022-01-31 07:25:36,451 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 488 transitions. Word has length 57 [2022-01-31 07:25:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:25:36,451 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 488 transitions. [2022-01-31 07:25:36,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:25:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 488 transitions. [2022-01-31 07:25:36,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 07:25:36,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:25:36,452 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-01-31 07:25:36,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-31 07:25:36,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-31 07:25:36,667 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:25:36,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:25:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash 774857308, now seen corresponding path program 8 times [2022-01-31 07:25:36,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:25:36,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404760986] [2022-01-31 07:25:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:25:36,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:25:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:36,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:25:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:36,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 07:25:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 07:25:36,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:25:36,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404760986] [2022-01-31 07:25:36,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404760986] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:25:36,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324419268] [2022-01-31 07:25:36,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:25:36,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:25:36,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:25:36,824 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:25:36,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-31 07:25:37,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:25:37,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:25:37,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 07:25:37,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:25:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 07:25:37,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:25:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 07:25:37,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324419268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:25:37,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:25:37,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-01-31 07:25:37,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671418476] [2022-01-31 07:25:37,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:25:37,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 07:25:37,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:25:37,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 07:25:37,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 07:25:37,899 INFO L87 Difference]: Start difference. First operand 385 states and 488 transitions. Second operand has 35 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:25:43,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:25:43,256 INFO L93 Difference]: Finished difference Result 1465 states and 1899 transitions. [2022-01-31 07:25:43,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 07:25:43,256 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 58 [2022-01-31 07:25:43,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:25:43,260 INFO L225 Difference]: With dead ends: 1465 [2022-01-31 07:25:43,260 INFO L226 Difference]: Without dead ends: 1414 [2022-01-31 07:25:43,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=886, Invalid=9214, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 07:25:43,265 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 924 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 8064 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 8492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 8064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 07:25:43,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 320 Invalid, 8492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 8064 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 07:25:43,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2022-01-31 07:25:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 441. [2022-01-31 07:25:43,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 397 states have (on average 1.2468513853904282) internal successors, (495), 403 states have internal predecessors, (495), 16 states have call successors, (16), 10 states have call predecessors, (16), 27 states have return successors, (45), 27 states have call predecessors, (45), 14 states have call successors, (45) [2022-01-31 07:25:43,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 556 transitions. [2022-01-31 07:25:43,280 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 556 transitions. Word has length 58 [2022-01-31 07:25:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:25:43,280 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 556 transitions. [2022-01-31 07:25:43,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:25:43,281 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 556 transitions. [2022-01-31 07:25:43,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 07:25:43,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:25:43,282 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:25:43,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-31 07:25:43,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-31 07:25:43,493 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:25:43,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:25:43,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1636730899, now seen corresponding path program 5 times [2022-01-31 07:25:43,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:25:43,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352006805] [2022-01-31 07:25:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:25:43,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:25:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:43,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:25:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:43,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 07:25:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 07:25:44,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:25:44,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352006805] [2022-01-31 07:25:44,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352006805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:25:44,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391521612] [2022-01-31 07:25:44,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:25:44,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:25:44,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:25:44,016 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:25:44,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-31 07:25:45,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 07:25:45,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:25:45,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 07:25:45,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:25:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 07:25:45,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:25:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 07:25:46,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391521612] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:25:46,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:25:46,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15, 15] total 43 [2022-01-31 07:25:46,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132767889] [2022-01-31 07:25:46,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:25:46,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 07:25:46,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:25:46,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 07:25:46,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 07:25:46,365 INFO L87 Difference]: Start difference. First operand 441 states and 556 transitions. Second operand has 43 states, 43 states have (on average 2.4651162790697674) internal successors, (106), 42 states have internal predecessors, (106), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:25:52,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:25:52,251 INFO L93 Difference]: Finished difference Result 1001 states and 1341 transitions. [2022-01-31 07:25:52,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 07:25:52,251 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.4651162790697674) internal successors, (106), 42 states have internal predecessors, (106), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2022-01-31 07:25:52,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:25:52,254 INFO L225 Difference]: With dead ends: 1001 [2022-01-31 07:25:52,254 INFO L226 Difference]: Without dead ends: 970 [2022-01-31 07:25:52,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=716, Invalid=7116, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 07:25:52,255 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 835 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 5500 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 5788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 5500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-01-31 07:25:52,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 242 Invalid, 5788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 5500 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-01-31 07:25:52,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-01-31 07:25:52,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 470. [2022-01-31 07:25:52,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 421 states have (on average 1.2541567695961995) internal successors, (528), 432 states have internal predecessors, (528), 18 states have call successors, (18), 10 states have call predecessors, (18), 30 states have return successors, (73), 27 states have call predecessors, (73), 16 states have call successors, (73) [2022-01-31 07:25:52,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 619 transitions. [2022-01-31 07:25:52,264 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 619 transitions. Word has length 60 [2022-01-31 07:25:52,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:25:52,264 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 619 transitions. [2022-01-31 07:25:52,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.4651162790697674) internal successors, (106), 42 states have internal predecessors, (106), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:25:52,265 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 619 transitions. [2022-01-31 07:25:52,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 07:25:52,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:25:52,266 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-01-31 07:25:52,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-31 07:25:52,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-01-31 07:25:52,472 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:25:52,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:25:52,472 INFO L85 PathProgramCache]: Analyzing trace with hash -972214114, now seen corresponding path program 1 times [2022-01-31 07:25:52,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:25:52,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60205248] [2022-01-31 07:25:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:25:52,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:25:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:52,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:25:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:52,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 07:25:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 07:25:52,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:25:52,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60205248] [2022-01-31 07:25:52,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60205248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:25:52,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324842043] [2022-01-31 07:25:52,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:25:52,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:25:52,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:25:52,764 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:25:52,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-31 07:25:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:52,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 07:25:52,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:25:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 07:25:53,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:25:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 07:25:53,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324842043] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:25:53,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:25:53,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 40 [2022-01-31 07:25:53,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511281829] [2022-01-31 07:25:53,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:25:53,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 07:25:53,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:25:53,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 07:25:53,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1435, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 07:25:53,667 INFO L87 Difference]: Start difference. First operand 470 states and 619 transitions. Second operand has 40 states, 40 states have (on average 2.725) internal successors, (109), 39 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:25:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:25:57,653 INFO L93 Difference]: Finished difference Result 1327 states and 1784 transitions. [2022-01-31 07:25:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 07:25:57,653 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.725) internal successors, (109), 39 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-01-31 07:25:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:25:57,657 INFO L225 Difference]: With dead ends: 1327 [2022-01-31 07:25:57,657 INFO L226 Difference]: Without dead ends: 1261 [2022-01-31 07:25:57,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=636, Invalid=6336, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 07:25:57,658 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 1133 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 5223 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 5436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 5223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 07:25:57,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1143 Valid, 255 Invalid, 5436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 5223 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 07:25:57,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2022-01-31 07:25:57,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 542. [2022-01-31 07:25:57,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 488 states have (on average 1.264344262295082) internal successors, (617), 501 states have internal predecessors, (617), 18 states have call successors, (18), 10 states have call predecessors, (18), 35 states have return successors, (76), 30 states have call predecessors, (76), 16 states have call successors, (76) [2022-01-31 07:25:57,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 711 transitions. [2022-01-31 07:25:57,669 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 711 transitions. Word has length 61 [2022-01-31 07:25:57,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:25:57,669 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 711 transitions. [2022-01-31 07:25:57,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.725) internal successors, (109), 39 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:25:57,669 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 711 transitions. [2022-01-31 07:25:57,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 07:25:57,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:25:57,671 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-31 07:25:57,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-31 07:25:57,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:25:57,882 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:25:57,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:25:57,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1759954749, now seen corresponding path program 2 times [2022-01-31 07:25:57,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:25:57,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273975031] [2022-01-31 07:25:57,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:25:57,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:25:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:58,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:25:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:58,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 07:25:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:58,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 07:25:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:58,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 07:25:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:58,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 07:25:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 07:25:58,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:25:58,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273975031] [2022-01-31 07:25:58,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273975031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:25:58,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752077563] [2022-01-31 07:25:58,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:25:58,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:25:58,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:25:58,041 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:25:58,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-31 07:25:58,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:25:58,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:25:58,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 07:25:58,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:25:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 07:25:58,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:25:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 07:25:58,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752077563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:25:58,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:25:58,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 25 [2022-01-31 07:25:58,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804234157] [2022-01-31 07:25:58,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:25:58,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 07:25:58,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:25:58,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 07:25:58,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-01-31 07:25:58,553 INFO L87 Difference]: Start difference. First operand 542 states and 711 transitions. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 10 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 07:25:59,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:25:59,969 INFO L93 Difference]: Finished difference Result 692 states and 906 transitions. [2022-01-31 07:25:59,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 07:25:59,970 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 10 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 65 [2022-01-31 07:25:59,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:25:59,972 INFO L225 Difference]: With dead ends: 692 [2022-01-31 07:25:59,972 INFO L226 Difference]: Without dead ends: 618 [2022-01-31 07:25:59,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=309, Invalid=1947, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 07:25:59,974 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 432 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2017 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 2017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 07:25:59,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 151 Invalid, 2213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 2017 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 07:25:59,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-01-31 07:25:59,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 586. [2022-01-31 07:25:59,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 524 states have (on average 1.2538167938931297) internal successors, (657), 535 states have internal predecessors, (657), 26 states have call successors, (26), 10 states have call predecessors, (26), 35 states have return successors, (83), 40 states have call predecessors, (83), 24 states have call successors, (83) [2022-01-31 07:25:59,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 766 transitions. [2022-01-31 07:25:59,988 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 766 transitions. Word has length 65 [2022-01-31 07:25:59,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:25:59,988 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 766 transitions. [2022-01-31 07:25:59,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 24 states have internal predecessors, (87), 10 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 07:25:59,989 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 766 transitions. [2022-01-31 07:25:59,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 07:25:59,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:25:59,990 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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] [2022-01-31 07:26:00,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-31 07:26:00,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-31 07:26:00,211 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:26:00,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:26:00,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1920644754, now seen corresponding path program 2 times [2022-01-31 07:26:00,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:26:00,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133185487] [2022-01-31 07:26:00,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:26:00,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:26:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:00,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:26:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:00,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 07:26:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:26:00,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:26:00,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133185487] [2022-01-31 07:26:00,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133185487] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:26:00,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930267999] [2022-01-31 07:26:00,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:26:00,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:26:00,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:26:00,345 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:26:00,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-31 07:26:00,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:26:00,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:26:00,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 07:26:00,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:26:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-31 07:26:00,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:26:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-31 07:26:00,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930267999] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:26:00,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:26:00,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 27 [2022-01-31 07:26:00,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135455687] [2022-01-31 07:26:00,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:26:00,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 07:26:00,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:26:00,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 07:26:00,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2022-01-31 07:26:00,858 INFO L87 Difference]: Start difference. First operand 586 states and 766 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 25 states have internal predecessors, (90), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:26:02,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:26:02,019 INFO L93 Difference]: Finished difference Result 621 states and 809 transitions. [2022-01-31 07:26:02,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 07:26:02,020 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 25 states have internal predecessors, (90), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-01-31 07:26:02,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:26:02,021 INFO L225 Difference]: With dead ends: 621 [2022-01-31 07:26:02,022 INFO L226 Difference]: Without dead ends: 605 [2022-01-31 07:26:02,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=2050, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 07:26:02,022 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 170 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 07:26:02,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 177 Invalid, 2370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 07:26:02,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-31 07:26:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 595. [2022-01-31 07:26:02,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 533 states have (on average 1.2551594746716699) internal successors, (669), 544 states have internal predecessors, (669), 26 states have call successors, (26), 10 states have call predecessors, (26), 35 states have return successors, (82), 40 states have call predecessors, (82), 24 states have call successors, (82) [2022-01-31 07:26:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 777 transitions. [2022-01-31 07:26:02,029 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 777 transitions. Word has length 63 [2022-01-31 07:26:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:26:02,029 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 777 transitions. [2022-01-31 07:26:02,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 25 states have internal predecessors, (90), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:26:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 777 transitions. [2022-01-31 07:26:02,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 07:26:02,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:26:02,031 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-01-31 07:26:02,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-31 07:26:02,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:26:02,247 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:26:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:26:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1612283129, now seen corresponding path program 9 times [2022-01-31 07:26:02,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:26:02,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725100419] [2022-01-31 07:26:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:26:02,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:26:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:02,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:26:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:02,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 07:26:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:26:02,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:26:02,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725100419] [2022-01-31 07:26:02,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725100419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:26:02,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055492177] [2022-01-31 07:26:02,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:26:02,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:26:02,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:26:02,724 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:26:02,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-31 07:26:03,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 07:26:03,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:26:03,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 82 conjunts are in the unsatisfiable core [2022-01-31 07:26:03,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:26:03,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 07:26:03,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 07:26:03,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:26:03,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:26:03,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:26:03,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:26:05,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 07:26:05,589 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 07:26:05,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 14 [2022-01-31 07:26:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:26:05,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:26:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-31 07:26:06,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055492177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:26:06,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:26:06,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29, 19] total 60 [2022-01-31 07:26:06,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596533918] [2022-01-31 07:26:06,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:26:06,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 07:26:06,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:26:06,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 07:26:06,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=3306, Unknown=2, NotChecked=0, Total=3540 [2022-01-31 07:26:06,706 INFO L87 Difference]: Start difference. First operand 595 states and 777 transitions. Second operand has 60 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:26:15,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:26:15,570 INFO L93 Difference]: Finished difference Result 1149 states and 1523 transitions. [2022-01-31 07:26:15,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 07:26:15,570 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 63 [2022-01-31 07:26:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:26:15,573 INFO L225 Difference]: With dead ends: 1149 [2022-01-31 07:26:15,573 INFO L226 Difference]: Without dead ends: 1127 [2022-01-31 07:26:15,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4061 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=985, Invalid=14265, Unknown=2, NotChecked=0, Total=15252 [2022-01-31 07:26:15,574 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 545 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 8356 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 10371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 8356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1789 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:26:15,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 395 Invalid, 10371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 8356 Invalid, 0 Unknown, 1789 Unchecked, 4.2s Time] [2022-01-31 07:26:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-01-31 07:26:15,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 622. [2022-01-31 07:26:15,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 559 states have (on average 1.2468694096601074) internal successors, (697), 568 states have internal predecessors, (697), 27 states have call successors, (27), 10 states have call predecessors, (27), 35 states have return successors, (93), 43 states have call predecessors, (93), 25 states have call successors, (93) [2022-01-31 07:26:15,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 817 transitions. [2022-01-31 07:26:15,586 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 817 transitions. Word has length 63 [2022-01-31 07:26:15,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:26:15,586 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 817 transitions. [2022-01-31 07:26:15,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:26:15,586 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 817 transitions. [2022-01-31 07:26:15,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 07:26:15,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:26:15,589 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-01-31 07:26:15,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-31 07:26:15,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-31 07:26:15,796 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:26:15,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:26:15,796 INFO L85 PathProgramCache]: Analyzing trace with hash -293264891, now seen corresponding path program 10 times [2022-01-31 07:26:15,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:26:15,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138051542] [2022-01-31 07:26:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:26:15,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:26:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:16,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:26:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:16,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 07:26:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:26:16,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:26:16,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138051542] [2022-01-31 07:26:16,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138051542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:26:16,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395159489] [2022-01-31 07:26:16,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:26:16,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:26:16,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:26:16,281 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:26:16,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-31 07:26:16,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:26:16,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:26:16,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 70 conjunts are in the unsatisfiable core [2022-01-31 07:26:16,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:26:18,553 INFO L353 Elim1Store]: treesize reduction 90, result has 18.2 percent of original size [2022-01-31 07:26:18,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 30 [2022-01-31 07:26:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:26:18,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:26:19,215 INFO L353 Elim1Store]: treesize reduction 26, result has 76.8 percent of original size [2022-01-31 07:26:19,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-01-31 07:26:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-31 07:26:20,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395159489] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:26:20,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:26:20,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28, 18] total 57 [2022-01-31 07:26:20,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508678986] [2022-01-31 07:26:20,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:26:20,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 07:26:20,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:26:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 07:26:20,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2999, Unknown=2, NotChecked=0, Total=3192 [2022-01-31 07:26:20,086 INFO L87 Difference]: Start difference. First operand 622 states and 817 transitions. Second operand has 57 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 56 states have internal predecessors, (123), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:26:28,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:26:28,222 INFO L93 Difference]: Finished difference Result 895 states and 1161 transitions. [2022-01-31 07:26:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 07:26:28,223 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 56 states have internal predecessors, (123), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 63 [2022-01-31 07:26:28,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:26:28,225 INFO L225 Difference]: With dead ends: 895 [2022-01-31 07:26:28,225 INFO L226 Difference]: Without dead ends: 895 [2022-01-31 07:26:28,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2515 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=658, Invalid=9238, Unknown=4, NotChecked=0, Total=9900 [2022-01-31 07:26:28,226 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 481 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 5009 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 5537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 5009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 07:26:28,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 223 Invalid, 5537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 5009 Invalid, 0 Unknown, 379 Unchecked, 2.7s Time] [2022-01-31 07:26:28,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-01-31 07:26:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 644. [2022-01-31 07:26:28,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 581 states have (on average 1.2409638554216869) internal successors, (721), 588 states have internal predecessors, (721), 27 states have call successors, (27), 10 states have call predecessors, (27), 35 states have return successors, (93), 45 states have call predecessors, (93), 25 states have call successors, (93) [2022-01-31 07:26:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 841 transitions. [2022-01-31 07:26:28,235 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 841 transitions. Word has length 63 [2022-01-31 07:26:28,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:26:28,236 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 841 transitions. [2022-01-31 07:26:28,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 56 states have internal predecessors, (123), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:26:28,236 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 841 transitions. [2022-01-31 07:26:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 07:26:28,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:26:28,237 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-01-31 07:26:28,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-31 07:26:28,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-31 07:26:28,451 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:26:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:26:28,452 INFO L85 PathProgramCache]: Analyzing trace with hash -76727737, now seen corresponding path program 11 times [2022-01-31 07:26:28,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:26:28,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424591024] [2022-01-31 07:26:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:26:28,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:26:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:28,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:26:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:28,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 07:26:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:26:28,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:26:28,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424591024] [2022-01-31 07:26:28,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424591024] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:26:28,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572984536] [2022-01-31 07:26:28,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:26:28,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:26:28,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:26:28,985 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:26:28,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-31 07:26:31,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 07:26:31,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:26:31,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 82 conjunts are in the unsatisfiable core [2022-01-31 07:26:31,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:26:31,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 07:26:31,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 07:26:31,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:26:31,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:26:31,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 07:26:31,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 07:26:31,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 11 [2022-01-31 07:26:32,023 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:26:32,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:26:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-31 07:26:32,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572984536] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:26:32,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:26:32,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 18] total 62 [2022-01-31 07:26:32,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543343228] [2022-01-31 07:26:32,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:26:32,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 07:26:32,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:26:32,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 07:26:32,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=3535, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 07:26:32,897 INFO L87 Difference]: Start difference. First operand 644 states and 841 transitions. Second operand has 62 states, 62 states have (on average 2.1774193548387095) internal successors, (135), 61 states have internal predecessors, (135), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:26:38,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:26:38,465 INFO L93 Difference]: Finished difference Result 1020 states and 1338 transitions. [2022-01-31 07:26:38,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 07:26:38,465 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.1774193548387095) internal successors, (135), 61 states have internal predecessors, (135), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 63 [2022-01-31 07:26:38,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:26:38,468 INFO L225 Difference]: With dead ends: 1020 [2022-01-31 07:26:38,468 INFO L226 Difference]: Without dead ends: 1020 [2022-01-31 07:26:38,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2591 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=715, Invalid=9587, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 07:26:38,469 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 509 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 8607 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 8809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 8607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:26:38,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 272 Invalid, 8809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 8607 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-01-31 07:26:38,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2022-01-31 07:26:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 650. [2022-01-31 07:26:38,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 587 states have (on average 1.2350936967632027) internal successors, (725), 592 states have internal predecessors, (725), 27 states have call successors, (27), 10 states have call predecessors, (27), 35 states have return successors, (93), 47 states have call predecessors, (93), 25 states have call successors, (93) [2022-01-31 07:26:38,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 845 transitions. [2022-01-31 07:26:38,480 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 845 transitions. Word has length 63 [2022-01-31 07:26:38,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:26:38,480 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 845 transitions. [2022-01-31 07:26:38,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.1774193548387095) internal successors, (135), 61 states have internal predecessors, (135), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:26:38,481 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 845 transitions. [2022-01-31 07:26:38,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 07:26:38,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:26:38,482 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:26:38,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-31 07:26:38,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-31 07:26:38,688 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:26:38,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:26:38,689 INFO L85 PathProgramCache]: Analyzing trace with hash 713920622, now seen corresponding path program 6 times [2022-01-31 07:26:38,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:26:38,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205766936] [2022-01-31 07:26:38,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:26:38,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:26:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:38,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:26:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:38,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 07:26:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-31 07:26:38,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:26:38,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205766936] [2022-01-31 07:26:38,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205766936] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:26:38,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442318816] [2022-01-31 07:26:38,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 07:26:38,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:26:38,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:26:38,859 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:26:38,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-31 07:26:39,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 07:26:39,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:26:39,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 07:26:39,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:26:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-31 07:26:39,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:27:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-31 07:27:36,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442318816] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:27:36,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:27:36,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2022-01-31 07:27:36,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303866201] [2022-01-31 07:27:36,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:27:36,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 07:27:36,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:27:36,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 07:27:36,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=296, Unknown=23, NotChecked=0, Total=380 [2022-01-31 07:27:36,204 INFO L87 Difference]: Start difference. First operand 650 states and 845 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:27:36,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:27:36,780 INFO L93 Difference]: Finished difference Result 840 states and 1075 transitions. [2022-01-31 07:27:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 07:27:36,781 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2022-01-31 07:27:36,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:27:36,783 INFO L225 Difference]: With dead ends: 840 [2022-01-31 07:27:36,783 INFO L226 Difference]: Without dead ends: 706 [2022-01-31 07:27:36,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 122 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 56.5s TimeCoverageRelationStatistics Valid=133, Invalid=714, Unknown=23, NotChecked=0, Total=870 [2022-01-31 07:27:36,784 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 112 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 07:27:36,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 120 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 651 Invalid, 0 Unknown, 204 Unchecked, 0.4s Time] [2022-01-31 07:27:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-01-31 07:27:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 615. [2022-01-31 07:27:36,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 553 states have (on average 1.244122965641953) internal successors, (688), 563 states have internal predecessors, (688), 26 states have call successors, (26), 10 states have call predecessors, (26), 35 states have return successors, (74), 41 states have call predecessors, (74), 24 states have call successors, (74) [2022-01-31 07:27:36,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 788 transitions. [2022-01-31 07:27:36,792 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 788 transitions. Word has length 65 [2022-01-31 07:27:36,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:27:36,792 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 788 transitions. [2022-01-31 07:27:36,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:27:36,792 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 788 transitions. [2022-01-31 07:27:36,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 07:27:36,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:27:36,793 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-01-31 07:27:36,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-31 07:27:36,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-31 07:27:36,999 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:27:36,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:27:37,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1938871839, now seen corresponding path program 3 times [2022-01-31 07:27:37,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:27:37,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769231485] [2022-01-31 07:27:37,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:27:37,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:27:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:27:37,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:27:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:27:37,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 07:27:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:27:37,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 07:27:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:27:37,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 07:27:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:27:37,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 07:27:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:27:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 07:27:37,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:27:37,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769231485] [2022-01-31 07:27:37,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769231485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:27:37,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732007998] [2022-01-31 07:27:37,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:27:37,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:27:37,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:27:37,161 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:27:37,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-31 07:27:37,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 07:27:37,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:27:37,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 07:27:37,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:27:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 07:27:37,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:27:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 07:27:38,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732007998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:27:38,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:27:38,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 28 [2022-01-31 07:27:38,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789614686] [2022-01-31 07:27:38,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:27:38,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 07:27:38,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:27:38,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 07:27:38,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-01-31 07:27:38,374 INFO L87 Difference]: Start difference. First operand 615 states and 788 transitions. Second operand has 28 states, 28 states have (on average 3.25) internal successors, (91), 27 states have internal predecessors, (91), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-01-31 07:27:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:27:41,104 INFO L93 Difference]: Finished difference Result 792 states and 1017 transitions. [2022-01-31 07:27:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 07:27:41,105 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 27 states have internal predecessors, (91), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 69 [2022-01-31 07:27:41,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:27:41,107 INFO L225 Difference]: With dead ends: 792 [2022-01-31 07:27:41,107 INFO L226 Difference]: Without dead ends: 666 [2022-01-31 07:27:41,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=731, Invalid=4099, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 07:27:41,108 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 441 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 07:27:41,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 125 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 07:27:41,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-01-31 07:27:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 598. [2022-01-31 07:27:41,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 539 states have (on average 1.2393320964749537) internal successors, (668), 549 states have internal predecessors, (668), 23 states have call successors, (23), 10 states have call predecessors, (23), 35 states have return successors, (71), 38 states have call predecessors, (71), 21 states have call successors, (71) [2022-01-31 07:27:41,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 762 transitions. [2022-01-31 07:27:41,116 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 762 transitions. Word has length 69 [2022-01-31 07:27:41,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:27:41,116 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 762 transitions. [2022-01-31 07:27:41,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 27 states have internal predecessors, (91), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-01-31 07:27:41,117 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 762 transitions. [2022-01-31 07:27:41,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 07:27:41,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:27:41,118 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:27:41,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-31 07:27:41,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-31 07:27:41,324 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:27:41,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:27:41,324 INFO L85 PathProgramCache]: Analyzing trace with hash 517853324, now seen corresponding path program 7 times [2022-01-31 07:27:41,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:27:41,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111163607] [2022-01-31 07:27:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:27:41,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:27:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:27:41,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:27:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:27:41,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 07:27:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:27:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 61 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 07:27:41,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:27:41,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111163607] [2022-01-31 07:27:41,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111163607] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:27:41,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706453407] [2022-01-31 07:27:41,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 07:27:41,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:27:41,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:27:41,880 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:27:41,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-31 07:27:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:27:42,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 63 conjunts are in the unsatisfiable core [2022-01-31 07:27:42,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:27:47,167 INFO L353 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2022-01-31 07:27:47,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 32 [2022-01-31 07:27:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 73 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:27:47,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:27:49,596 INFO L353 Elim1Store]: treesize reduction 26, result has 76.8 percent of original size [2022-01-31 07:27:49,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-01-31 07:27:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-31 07:27:50,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706453407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:27:50,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:27:50,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 15] total 46 [2022-01-31 07:27:50,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085871026] [2022-01-31 07:27:50,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:27:50,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 07:27:50,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:27:50,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 07:27:50,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1911, Unknown=14, NotChecked=0, Total=2070 [2022-01-31 07:27:50,410 INFO L87 Difference]: Start difference. First operand 598 states and 762 transitions. Second operand has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 45 states have internal predecessors, (123), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 07:27:55,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:27:55,930 INFO L93 Difference]: Finished difference Result 840 states and 1082 transitions. [2022-01-31 07:27:55,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 07:27:55,931 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 45 states have internal predecessors, (123), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-01-31 07:27:55,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:27:55,933 INFO L225 Difference]: With dead ends: 840 [2022-01-31 07:27:55,933 INFO L226 Difference]: Without dead ends: 840 [2022-01-31 07:27:55,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=354, Invalid=4740, Unknown=18, NotChecked=0, Total=5112 [2022-01-31 07:27:55,934 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 240 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 2512 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 3157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 574 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 07:27:55,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 405 Invalid, 3157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2512 Invalid, 0 Unknown, 574 Unchecked, 1.4s Time] [2022-01-31 07:27:55,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-01-31 07:27:55,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 610. [2022-01-31 07:27:55,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 550 states have (on average 1.2363636363636363) internal successors, (680), 560 states have internal predecessors, (680), 23 states have call successors, (23), 10 states have call predecessors, (23), 36 states have return successors, (72), 39 states have call predecessors, (72), 21 states have call successors, (72) [2022-01-31 07:27:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 775 transitions. [2022-01-31 07:27:55,942 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 775 transitions. Word has length 67 [2022-01-31 07:27:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:27:55,942 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 775 transitions. [2022-01-31 07:27:55,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 45 states have internal predecessors, (123), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 07:27:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 775 transitions. [2022-01-31 07:27:55,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 07:27:55,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:27:55,943 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 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] [2022-01-31 07:27:55,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-31 07:27:56,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-31 07:27:56,162 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:27:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:27:56,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1233821783, now seen corresponding path program 12 times [2022-01-31 07:27:56,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:27:56,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113026979] [2022-01-31 07:27:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:27:56,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:27:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:27:56,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:27:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:27:56,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 07:27:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:27:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-31 07:27:56,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:27:56,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113026979] [2022-01-31 07:27:56,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113026979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:27:56,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382178492] [2022-01-31 07:27:56,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 07:27:56,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:27:56,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:27:56,368 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:27:56,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-31 07:27:56,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 07:27:56,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:27:56,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 83 conjunts are in the unsatisfiable core [2022-01-31 07:27:56,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:27:57,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 07:27:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 13 proven. 70 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 07:27:57,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:27:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-31 07:27:59,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382178492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:27:59,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:27:59,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 19] total 55 [2022-01-31 07:27:59,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794671992] [2022-01-31 07:27:59,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:27:59,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 07:27:59,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:27:59,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 07:27:59,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2761, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 07:27:59,139 INFO L87 Difference]: Start difference. First operand 610 states and 775 transitions. Second operand has 55 states, 55 states have (on average 2.5636363636363635) internal successors, (141), 54 states have internal predecessors, (141), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:28:19,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:28:19,566 INFO L93 Difference]: Finished difference Result 2143 states and 2764 transitions. [2022-01-31 07:28:19,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 07:28:19,567 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.5636363636363635) internal successors, (141), 54 states have internal predecessors, (141), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 68 [2022-01-31 07:28:19,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:28:19,572 INFO L225 Difference]: With dead ends: 2143 [2022-01-31 07:28:19,572 INFO L226 Difference]: Without dead ends: 2137 [2022-01-31 07:28:19,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9778 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2186, Invalid=30034, Unknown=0, NotChecked=0, Total=32220 [2022-01-31 07:28:19,573 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 808 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 16216 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 16668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 16216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-01-31 07:28:19,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 385 Invalid, 16668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 16216 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2022-01-31 07:28:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2022-01-31 07:28:19,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 634. [2022-01-31 07:28:19,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 573 states have (on average 1.237347294938918) internal successors, (709), 583 states have internal predecessors, (709), 23 states have call successors, (23), 10 states have call predecessors, (23), 37 states have return successors, (73), 40 states have call predecessors, (73), 21 states have call successors, (73) [2022-01-31 07:28:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 805 transitions. [2022-01-31 07:28:19,588 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 805 transitions. Word has length 68 [2022-01-31 07:28:19,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:28:19,588 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 805 transitions. [2022-01-31 07:28:19,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.5636363636363635) internal successors, (141), 54 states have internal predecessors, (141), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:28:19,588 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 805 transitions. [2022-01-31 07:28:19,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 07:28:19,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:28:19,590 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-01-31 07:28:19,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-31 07:28:19,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-01-31 07:28:19,794 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:28:19,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:28:19,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1466730019, now seen corresponding path program 2 times [2022-01-31 07:28:19,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:28:19,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837045835] [2022-01-31 07:28:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:28:19,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:28:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:19,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:28:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:19,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 07:28:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:20,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 07:28:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:20,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 07:28:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:20,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 07:28:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:28:20,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:28:20,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837045835] [2022-01-31 07:28:20,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837045835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:28:20,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526438319] [2022-01-31 07:28:20,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:28:20,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:28:20,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:28:20,285 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:28:20,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-31 07:28:20,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:28:20,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:28:20,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 07:28:20,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:28:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 07:28:20,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:28:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 07:28:21,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526438319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:28:21,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:28:21,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15, 13] total 41 [2022-01-31 07:28:21,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458644790] [2022-01-31 07:28:21,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:28:21,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 07:28:21,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:28:21,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 07:28:21,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 07:28:21,455 INFO L87 Difference]: Start difference. First operand 634 states and 805 transitions. Second operand has 41 states, 40 states have (on average 2.725) internal successors, (109), 40 states have internal predecessors, (109), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 07:28:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:28:23,951 INFO L93 Difference]: Finished difference Result 754 states and 959 transitions. [2022-01-31 07:28:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 07:28:23,951 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.725) internal successors, (109), 40 states have internal predecessors, (109), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 72 [2022-01-31 07:28:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:28:23,953 INFO L225 Difference]: With dead ends: 754 [2022-01-31 07:28:23,953 INFO L226 Difference]: Without dead ends: 749 [2022-01-31 07:28:23,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 135 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=420, Invalid=4136, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 07:28:23,955 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 313 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2356 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 07:28:23,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 155 Invalid, 2455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2356 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 07:28:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-31 07:28:23,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 603. [2022-01-31 07:28:23,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 549 states have (on average 1.2404371584699454) internal successors, (681), 557 states have internal predecessors, (681), 18 states have call successors, (18), 10 states have call predecessors, (18), 35 states have return successors, (63), 35 states have call predecessors, (63), 16 states have call successors, (63) [2022-01-31 07:28:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 762 transitions. [2022-01-31 07:28:23,969 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 762 transitions. Word has length 72 [2022-01-31 07:28:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:28:23,969 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 762 transitions. [2022-01-31 07:28:23,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.725) internal successors, (109), 40 states have internal predecessors, (109), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 07:28:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 762 transitions. [2022-01-31 07:28:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 07:28:23,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:28:23,971 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 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] [2022-01-31 07:28:23,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-31 07:28:24,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:28:24,183 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:28:24,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:28:24,184 INFO L85 PathProgramCache]: Analyzing trace with hash 2009455495, now seen corresponding path program 2 times [2022-01-31 07:28:24,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:28:24,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094267639] [2022-01-31 07:28:24,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:28:24,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:28:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:24,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:28:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:24,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 07:28:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-31 07:28:24,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:28:24,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094267639] [2022-01-31 07:28:24,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094267639] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:28:24,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614398376] [2022-01-31 07:28:24,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:28:24,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:28:24,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:28:24,340 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:28:24,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-31 07:28:24,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:28:24,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:28:24,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 07:28:24,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:28:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-31 07:28:24,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:28:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-31 07:28:25,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614398376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:28:25,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:28:25,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-01-31 07:28:25,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422610752] [2022-01-31 07:28:25,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:28:25,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 07:28:25,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:28:25,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 07:28:25,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2022-01-31 07:28:25,022 INFO L87 Difference]: Start difference. First operand 603 states and 762 transitions. Second operand has 28 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:28:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:28:27,018 INFO L93 Difference]: Finished difference Result 759 states and 997 transitions. [2022-01-31 07:28:27,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 07:28:27,019 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 69 [2022-01-31 07:28:27,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:28:27,020 INFO L225 Difference]: With dead ends: 759 [2022-01-31 07:28:27,020 INFO L226 Difference]: Without dead ends: 712 [2022-01-31 07:28:27,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=460, Invalid=2090, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 07:28:27,021 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 536 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 07:28:27,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 147 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 07:28:27,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-01-31 07:28:27,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 702. [2022-01-31 07:28:27,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 648 states have (on average 1.2546296296296295) internal successors, (813), 656 states have internal predecessors, (813), 18 states have call successors, (18), 10 states have call predecessors, (18), 35 states have return successors, (63), 35 states have call predecessors, (63), 16 states have call successors, (63) [2022-01-31 07:28:27,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 894 transitions. [2022-01-31 07:28:27,028 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 894 transitions. Word has length 69 [2022-01-31 07:28:27,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:28:27,028 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 894 transitions. [2022-01-31 07:28:27,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:28:27,028 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 894 transitions. [2022-01-31 07:28:27,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 07:28:27,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:28:27,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-01-31 07:28:27,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-31 07:28:27,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-01-31 07:28:27,243 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:28:27,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:28:27,244 INFO L85 PathProgramCache]: Analyzing trace with hash 706094499, now seen corresponding path program 1 times [2022-01-31 07:28:27,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:28:27,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356790068] [2022-01-31 07:28:27,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:28:27,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:28:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:27,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:28:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:27,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 07:28:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:27,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 07:28:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:27,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 07:28:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:27,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 07:28:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 07:28:27,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:28:27,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356790068] [2022-01-31 07:28:27,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356790068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:28:27,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331404130] [2022-01-31 07:28:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:28:27,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:28:27,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:28:27,657 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:28:27,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-31 07:28:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:27,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 07:28:27,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:28:28,153 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 07:28:28,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2022-01-31 07:28:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 07:28:28,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:28:28,441 INFO L353 Elim1Store]: treesize reduction 30, result has 73.2 percent of original size [2022-01-31 07:28:28,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 89 [2022-01-31 07:28:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 07:28:28,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331404130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:28:28,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:28:28,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 13] total 33 [2022-01-31 07:28:28,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696862886] [2022-01-31 07:28:28,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:28:28,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 07:28:28,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:28:28,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 07:28:28,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 07:28:28,866 INFO L87 Difference]: Start difference. First operand 702 states and 894 transitions. Second operand has 33 states, 31 states have (on average 3.3225806451612905) internal successors, (103), 32 states have internal predecessors, (103), 10 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 07:28:30,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:28:30,258 INFO L93 Difference]: Finished difference Result 947 states and 1218 transitions. [2022-01-31 07:28:30,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 07:28:30,259 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.3225806451612905) internal successors, (103), 32 states have internal predecessors, (103), 10 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) Word has length 73 [2022-01-31 07:28:30,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:28:30,261 INFO L225 Difference]: With dead ends: 947 [2022-01-31 07:28:30,261 INFO L226 Difference]: Without dead ends: 945 [2022-01-31 07:28:30,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=243, Invalid=2109, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 07:28:30,262 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 169 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2122 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:28:30,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 168 Invalid, 2192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2122 Invalid, 0 Unknown, 12 Unchecked, 1.0s Time] [2022-01-31 07:28:30,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-01-31 07:28:30,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 721. [2022-01-31 07:28:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 662 states have (on average 1.2492447129909365) internal successors, (827), 672 states have internal predecessors, (827), 20 states have call successors, (20), 10 states have call predecessors, (20), 38 states have return successors, (71), 38 states have call predecessors, (71), 18 states have call successors, (71) [2022-01-31 07:28:30,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 918 transitions. [2022-01-31 07:28:30,275 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 918 transitions. Word has length 73 [2022-01-31 07:28:30,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:28:30,275 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 918 transitions. [2022-01-31 07:28:30,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.3225806451612905) internal successors, (103), 32 states have internal predecessors, (103), 10 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 07:28:30,275 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 918 transitions. [2022-01-31 07:28:30,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 07:28:30,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:28:30,277 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:28:30,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-31 07:28:30,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:28:30,477 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:28:30,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:28:30,477 INFO L85 PathProgramCache]: Analyzing trace with hash -73633808, now seen corresponding path program 8 times [2022-01-31 07:28:30,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:28:30,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698071228] [2022-01-31 07:28:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:28:30,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:28:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:31,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:28:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:31,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 07:28:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:28:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:28:31,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:28:31,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698071228] [2022-01-31 07:28:31,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698071228] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:28:31,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614449452] [2022-01-31 07:28:31,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:28:31,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:28:31,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:28:31,630 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:28:31,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-31 07:28:31,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:28:31,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:28:31,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 07:28:31,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:28:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-31 07:28:32,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:28:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-31 07:28:33,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614449452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:28:33,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:28:33,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 15, 15] total 53 [2022-01-31 07:28:33,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661729261] [2022-01-31 07:28:33,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:28:33,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 07:28:33,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:28:33,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 07:28:33,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2554, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 07:28:33,053 INFO L87 Difference]: Start difference. First operand 721 states and 918 transitions. Second operand has 53 states, 52 states have (on average 2.3076923076923075) internal successors, (120), 52 states have internal predecessors, (120), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:29:02,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:29:02,368 INFO L93 Difference]: Finished difference Result 2760 states and 3547 transitions. [2022-01-31 07:29:02,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 07:29:02,371 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.3076923076923075) internal successors, (120), 52 states have internal predecessors, (120), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 70 [2022-01-31 07:29:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:29:02,377 INFO L225 Difference]: With dead ends: 2760 [2022-01-31 07:29:02,377 INFO L226 Difference]: Without dead ends: 2733 [2022-01-31 07:29:02,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5663 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=1556, Invalid=19035, Unknown=1, NotChecked=0, Total=20592 [2022-01-31 07:29:02,378 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 1900 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 10396 mSolverCounterSat, 890 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1900 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 11286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 890 IncrementalHoareTripleChecker+Valid, 10396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:29:02,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1900 Valid, 324 Invalid, 11286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [890 Valid, 10396 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-01-31 07:29:02,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2022-01-31 07:29:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 823. [2022-01-31 07:29:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 753 states have (on average 1.2443559096945551) internal successors, (937), 767 states have internal predecessors, (937), 21 states have call successors, (21), 11 states have call predecessors, (21), 48 states have return successors, (78), 44 states have call predecessors, (78), 19 states have call successors, (78) [2022-01-31 07:29:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1036 transitions. [2022-01-31 07:29:02,394 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1036 transitions. Word has length 70 [2022-01-31 07:29:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:29:02,394 INFO L470 AbstractCegarLoop]: Abstraction has 823 states and 1036 transitions. [2022-01-31 07:29:02,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.3076923076923075) internal successors, (120), 52 states have internal predecessors, (120), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:29:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1036 transitions. [2022-01-31 07:29:02,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 07:29:02,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:29:02,397 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-01-31 07:29:02,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-31 07:29:02,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:29:02,611 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:29:02,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:29:02,612 INFO L85 PathProgramCache]: Analyzing trace with hash -156884883, now seen corresponding path program 1 times [2022-01-31 07:29:02,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:29:02,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049604655] [2022-01-31 07:29:02,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:29:02,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:29:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:29:02,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:29:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:29:02,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 07:29:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:29:02,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 07:29:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:29:02,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 07:29:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:29:02,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 07:29:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:29:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 07:29:02,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:29:02,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049604655] [2022-01-31 07:29:02,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049604655] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:29:02,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865756310] [2022-01-31 07:29:02,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:29:02,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:29:02,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:29:02,994 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:29:02,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-31 07:29:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:29:03,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-31 07:29:03,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:29:04,483 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0.base_BEFORE_CALL_31 Int) (v_main_~pat~0.base_BEFORE_CALL_31 Int) (v_main_~a~0.offset_BEFORE_CALL_41 Int) (v_main_~pat~0.offset_BEFORE_CALL_36 Int)) (= (select (select |c_#memory_int| v_main_~pat~0.base_BEFORE_CALL_31) (+ v_main_~pat~0.offset_BEFORE_CALL_36 8)) (select (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_31) (+ v_main_~a~0.offset_BEFORE_CALL_41 4)))) is different from true [2022-01-31 07:29:07,646 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0.base_BEFORE_CALL_32 Int) (v_main_~pat~0.base_BEFORE_CALL_32 Int) (v_main_~a~0.offset_BEFORE_CALL_42 Int) (v_main_~pat~0.offset_BEFORE_CALL_37 Int)) (= (select (select |c_#memory_int| v_main_~pat~0.base_BEFORE_CALL_32) (+ v_main_~pat~0.offset_BEFORE_CALL_37 8)) (select (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_32) (+ v_main_~a~0.offset_BEFORE_CALL_42 4)))) is different from true [2022-01-31 07:29:09,763 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0.base_BEFORE_CALL_33 Int) (v_main_~pat~0.base_BEFORE_CALL_33 Int) (v_main_~pat~0.offset_BEFORE_CALL_38 Int) (v_main_~a~0.offset_BEFORE_CALL_43 Int)) (= (select (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_33) (+ v_main_~a~0.offset_BEFORE_CALL_43 4)) (select (select |c_#memory_int| v_main_~pat~0.base_BEFORE_CALL_33) (+ v_main_~pat~0.offset_BEFORE_CALL_38 8)))) is different from true [2022-01-31 07:29:09,842 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 07:29:09,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2022-01-31 07:29:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 6 not checked. [2022-01-31 07:29:09,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:29:10,134 INFO L353 Elim1Store]: treesize reduction 28, result has 75.0 percent of original size [2022-01-31 07:29:10,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 91 [2022-01-31 07:29:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 07:29:10,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865756310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:29:10,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:29:10,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 16] total 42 [2022-01-31 07:29:10,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346142199] [2022-01-31 07:29:10,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:29:10,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 07:29:10,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:29:10,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 07:29:10,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1369, Unknown=3, NotChecked=228, Total=1722 [2022-01-31 07:29:10,787 INFO L87 Difference]: Start difference. First operand 823 states and 1036 transitions. Second operand has 42 states, 41 states have (on average 3.048780487804878) internal successors, (125), 39 states have internal predecessors, (125), 11 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (12), 9 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 07:30:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:30:07,061 INFO L93 Difference]: Finished difference Result 1093 states and 1388 transitions. [2022-01-31 07:30:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 07:30:07,062 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.048780487804878) internal successors, (125), 39 states have internal predecessors, (125), 11 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (12), 9 states have call predecessors, (12), 10 states have call successors, (12) Word has length 74 [2022-01-31 07:30:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:30:07,064 INFO L225 Difference]: With dead ends: 1093 [2022-01-31 07:30:07,064 INFO L226 Difference]: Without dead ends: 1093 [2022-01-31 07:30:07,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 132 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 61.7s TimeCoverageRelationStatistics Valid=314, Invalid=3579, Unknown=25, NotChecked=372, Total=4290 [2022-01-31 07:30:07,065 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 217 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 2968 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 3692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 649 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 07:30:07,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 257 Invalid, 3692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2968 Invalid, 0 Unknown, 649 Unchecked, 1.5s Time] [2022-01-31 07:30:07,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-01-31 07:30:07,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 838. [2022-01-31 07:30:07,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 764 states have (on average 1.2421465968586387) internal successors, (949), 779 states have internal predecessors, (949), 23 states have call successors, (23), 13 states have call predecessors, (23), 50 states have return successors, (80), 45 states have call predecessors, (80), 21 states have call successors, (80) [2022-01-31 07:30:07,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1052 transitions. [2022-01-31 07:30:07,074 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1052 transitions. Word has length 74 [2022-01-31 07:30:07,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:30:07,074 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1052 transitions. [2022-01-31 07:30:07,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.048780487804878) internal successors, (125), 39 states have internal predecessors, (125), 11 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (12), 9 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 07:30:07,074 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1052 transitions. [2022-01-31 07:30:07,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 07:30:07,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:30:07,076 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-01-31 07:30:07,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-31 07:30:07,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-31 07:30:07,279 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:30:07,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:30:07,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1341745335, now seen corresponding path program 2 times [2022-01-31 07:30:07,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:30:07,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980987052] [2022-01-31 07:30:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:30:07,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:30:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:07,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:30:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:07,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 07:30:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:07,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 07:30:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:07,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 07:30:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:07,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 07:30:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 07:30:07,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:30:07,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980987052] [2022-01-31 07:30:07,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980987052] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:30:07,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236094339] [2022-01-31 07:30:07,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:30:07,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:30:07,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:30:07,739 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:30:07,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-31 07:30:07,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:30:07,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:30:07,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 07:30:07,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:30:09,692 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-31 07:30:09,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-01-31 07:30:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-31 07:30:09,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:30:12,253 INFO L353 Elim1Store]: treesize reduction 20, result has 80.0 percent of original size [2022-01-31 07:30:12,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 87 [2022-01-31 07:30:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 07:30:12,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236094339] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:30:12,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:30:12,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 11] total 28 [2022-01-31 07:30:12,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789897417] [2022-01-31 07:30:12,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:30:12,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 07:30:12,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:30:12,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 07:30:12,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=663, Unknown=5, NotChecked=0, Total=756 [2022-01-31 07:30:12,448 INFO L87 Difference]: Start difference. First operand 838 states and 1052 transitions. Second operand has 28 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 27 states have internal predecessors, (90), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-01-31 07:30:19,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:30:19,651 INFO L93 Difference]: Finished difference Result 1065 states and 1353 transitions. [2022-01-31 07:30:19,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 07:30:19,651 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 27 states have internal predecessors, (90), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 74 [2022-01-31 07:30:19,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:30:19,653 INFO L225 Difference]: With dead ends: 1065 [2022-01-31 07:30:19,653 INFO L226 Difference]: Without dead ends: 1064 [2022-01-31 07:30:19,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=217, Invalid=1410, Unknown=13, NotChecked=0, Total=1640 [2022-01-31 07:30:19,654 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 222 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 07:30:19,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 146 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1122 Invalid, 0 Unknown, 124 Unchecked, 0.6s Time] [2022-01-31 07:30:19,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2022-01-31 07:30:19,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 827. [2022-01-31 07:30:19,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 755 states have (on average 1.2410596026490066) internal successors, (937), 770 states have internal predecessors, (937), 21 states have call successors, (21), 13 states have call predecessors, (21), 50 states have return successors, (78), 43 states have call predecessors, (78), 19 states have call successors, (78) [2022-01-31 07:30:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1036 transitions. [2022-01-31 07:30:19,662 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1036 transitions. Word has length 74 [2022-01-31 07:30:19,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:30:19,662 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1036 transitions. [2022-01-31 07:30:19,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 27 states have internal predecessors, (90), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-01-31 07:30:19,663 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1036 transitions. [2022-01-31 07:30:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 07:30:19,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:30:19,664 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2022-01-31 07:30:19,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-31 07:30:19,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-01-31 07:30:19,882 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:30:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:30:19,883 INFO L85 PathProgramCache]: Analyzing trace with hash 607992233, now seen corresponding path program 3 times [2022-01-31 07:30:19,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:30:19,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618381858] [2022-01-31 07:30:19,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:30:19,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:30:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:19,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:30:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:19,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 07:30:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:19,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 07:30:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:19,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 07:30:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:19,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 07:30:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 07:30:19,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:30:19,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618381858] [2022-01-31 07:30:19,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618381858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:30:19,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:30:19,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 07:30:19,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539554832] [2022-01-31 07:30:19,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:30:19,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 07:30:19,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:30:19,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 07:30:19,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:30:19,958 INFO L87 Difference]: Start difference. First operand 827 states and 1036 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 07:30:20,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:30:20,171 INFO L93 Difference]: Finished difference Result 838 states and 1049 transitions. [2022-01-31 07:30:20,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:30:20,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 75 [2022-01-31 07:30:20,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:30:20,174 INFO L225 Difference]: With dead ends: 838 [2022-01-31 07:30:20,174 INFO L226 Difference]: Without dead ends: 838 [2022-01-31 07:30:20,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-31 07:30:20,174 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 63 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:30:20,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 78 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:30:20,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-01-31 07:30:20,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 831. [2022-01-31 07:30:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 759 states have (on average 1.2397891963109355) internal successors, (941), 774 states have internal predecessors, (941), 21 states have call successors, (21), 13 states have call predecessors, (21), 50 states have return successors, (78), 43 states have call predecessors, (78), 19 states have call successors, (78) [2022-01-31 07:30:20,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1040 transitions. [2022-01-31 07:30:20,183 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1040 transitions. Word has length 75 [2022-01-31 07:30:20,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:30:20,183 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1040 transitions. [2022-01-31 07:30:20,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 07:30:20,183 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1040 transitions. [2022-01-31 07:30:20,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 07:30:20,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:30:20,184 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-31 07:30:20,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 07:30:20,185 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:30:20,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:30:20,185 INFO L85 PathProgramCache]: Analyzing trace with hash -797270182, now seen corresponding path program 1 times [2022-01-31 07:30:20,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:30:20,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443205657] [2022-01-31 07:30:20,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:30:20,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:30:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:20,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:30:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:20,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 07:30:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:20,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 07:30:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:20,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 07:30:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:20,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 07:30:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 07:30:20,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:30:20,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443205657] [2022-01-31 07:30:20,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443205657] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:30:20,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111726481] [2022-01-31 07:30:20,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:30:20,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:30:20,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:30:20,572 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:30:20,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-31 07:30:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:20,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-31 07:30:20,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:30:22,080 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0.base_BEFORE_CALL_41 Int) (v_main_~pat~0.base_BEFORE_CALL_41 Int) (v_main_~a~0.offset_BEFORE_CALL_52 Int) (v_main_~pat~0.offset_BEFORE_CALL_47 Int)) (= (select (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_41) (+ v_main_~a~0.offset_BEFORE_CALL_52 4)) (select (select |c_#memory_int| v_main_~pat~0.base_BEFORE_CALL_41) (+ v_main_~pat~0.offset_BEFORE_CALL_47 8)))) is different from true [2022-01-31 07:30:25,301 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0.base_BEFORE_CALL_42 Int) (v_main_~pat~0.base_BEFORE_CALL_42 Int) (v_main_~a~0.offset_BEFORE_CALL_53 Int) (v_main_~pat~0.offset_BEFORE_CALL_48 Int)) (= (select (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_42) (+ v_main_~a~0.offset_BEFORE_CALL_53 4)) (select (select |c_#memory_int| v_main_~pat~0.base_BEFORE_CALL_42) (+ v_main_~pat~0.offset_BEFORE_CALL_48 8)))) is different from true [2022-01-31 07:30:27,504 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0.base_BEFORE_CALL_43 Int) (v_main_~pat~0.base_BEFORE_CALL_43 Int) (v_main_~pat~0.offset_BEFORE_CALL_49 Int) (v_main_~a~0.offset_BEFORE_CALL_54 Int)) (= (select (select |c_#memory_int| v_main_~pat~0.base_BEFORE_CALL_43) (+ v_main_~pat~0.offset_BEFORE_CALL_49 8)) (select (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_43) (+ v_main_~a~0.offset_BEFORE_CALL_54 4)))) is different from true [2022-01-31 07:30:27,586 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 07:30:27,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2022-01-31 07:30:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 5 trivial. 8 not checked. [2022-01-31 07:30:27,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:30:27,884 INFO L353 Elim1Store]: treesize reduction 28, result has 75.0 percent of original size [2022-01-31 07:30:27,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 91 [2022-01-31 07:30:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 07:30:28,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111726481] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:30:28,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:30:28,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 16] total 42 [2022-01-31 07:30:28,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619189499] [2022-01-31 07:30:28,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:30:28,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 07:30:28,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:30:28,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 07:30:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1369, Unknown=3, NotChecked=228, Total=1722 [2022-01-31 07:30:28,599 INFO L87 Difference]: Start difference. First operand 831 states and 1040 transitions. Second operand has 42 states, 41 states have (on average 3.1951219512195124) internal successors, (131), 39 states have internal predecessors, (131), 11 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (12), 9 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 07:31:28,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:31:28,293 INFO L93 Difference]: Finished difference Result 1106 states and 1401 transitions. [2022-01-31 07:31:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 07:31:28,294 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.1951219512195124) internal successors, (131), 39 states have internal predecessors, (131), 11 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (12), 9 states have call predecessors, (12), 10 states have call successors, (12) Word has length 76 [2022-01-31 07:31:28,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:31:28,295 INFO L225 Difference]: With dead ends: 1106 [2022-01-31 07:31:28,295 INFO L226 Difference]: Without dead ends: 1106 [2022-01-31 07:31:28,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 136 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 65.1s TimeCoverageRelationStatistics Valid=317, Invalid=3700, Unknown=27, NotChecked=378, Total=4422 [2022-01-31 07:31:28,296 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 274 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 3079 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 3763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 593 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 07:31:28,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 246 Invalid, 3763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3079 Invalid, 0 Unknown, 593 Unchecked, 1.6s Time] [2022-01-31 07:31:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-01-31 07:31:28,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 847. [2022-01-31 07:31:28,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 773 states have (on average 1.239327296248383) internal successors, (958), 787 states have internal predecessors, (958), 22 states have call successors, (22), 14 states have call predecessors, (22), 51 states have return successors, (79), 45 states have call predecessors, (79), 20 states have call successors, (79) [2022-01-31 07:31:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1059 transitions. [2022-01-31 07:31:28,304 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1059 transitions. Word has length 76 [2022-01-31 07:31:28,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:31:28,305 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1059 transitions. [2022-01-31 07:31:28,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.1951219512195124) internal successors, (131), 39 states have internal predecessors, (131), 11 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (12), 9 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 07:31:28,305 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1059 transitions. [2022-01-31 07:31:28,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 07:31:28,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:31:28,306 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 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] [2022-01-31 07:31:28,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-31 07:31:28,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-31 07:31:28,519 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:31:28,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:31:28,520 INFO L85 PathProgramCache]: Analyzing trace with hash 142673912, now seen corresponding path program 13 times [2022-01-31 07:31:28,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:31:28,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863512766] [2022-01-31 07:31:28,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:31:28,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:31:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:31:28,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:31:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:31:28,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 07:31:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:31:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 07:31:29,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:31:29,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863512766] [2022-01-31 07:31:29,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863512766] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:31:29,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012376695] [2022-01-31 07:31:29,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 07:31:29,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:31:29,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:31:29,212 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:31:29,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-31 07:31:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:31:29,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 73 conjunts are in the unsatisfiable core [2022-01-31 07:31:29,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:31:30,231 INFO L353 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2022-01-31 07:31:30,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 22 [2022-01-31 07:31:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 101 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 07:31:30,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:31:30,865 INFO L353 Elim1Store]: treesize reduction 26, result has 76.8 percent of original size [2022-01-31 07:31:30,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-01-31 07:31:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-31 07:31:31,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012376695] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:31:31,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:31:31,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 19] total 56 [2022-01-31 07:31:31,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298361256] [2022-01-31 07:31:31,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:31:31,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 07:31:31,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:31:31,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 07:31:31,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2900, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 07:31:31,985 INFO L87 Difference]: Start difference. First operand 847 states and 1059 transitions. Second operand has 56 states, 56 states have (on average 2.375) internal successors, (133), 55 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:31:36,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:31:36,941 INFO L93 Difference]: Finished difference Result 1455 states and 1837 transitions. [2022-01-31 07:31:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 07:31:36,942 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.375) internal successors, (133), 55 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 73 [2022-01-31 07:31:36,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:31:36,944 INFO L225 Difference]: With dead ends: 1455 [2022-01-31 07:31:36,944 INFO L226 Difference]: Without dead ends: 1454 [2022-01-31 07:31:36,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1997 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=483, Invalid=7707, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 07:31:36,945 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 417 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 6490 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 6647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 6490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-01-31 07:31:36,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 262 Invalid, 6647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 6490 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-01-31 07:31:36,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-01-31 07:31:36,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 867. [2022-01-31 07:31:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 792 states have (on average 1.2411616161616161) internal successors, (983), 806 states have internal predecessors, (983), 22 states have call successors, (22), 14 states have call predecessors, (22), 52 states have return successors, (80), 46 states have call predecessors, (80), 20 states have call successors, (80) [2022-01-31 07:31:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1085 transitions. [2022-01-31 07:31:36,956 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1085 transitions. Word has length 73 [2022-01-31 07:31:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:31:36,956 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 1085 transitions. [2022-01-31 07:31:36,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.375) internal successors, (133), 55 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:31:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1085 transitions. [2022-01-31 07:31:36,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 07:31:36,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:31:36,958 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 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] [2022-01-31 07:31:36,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-31 07:31:37,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-31 07:31:37,158 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:31:37,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:31:37,159 INFO L85 PathProgramCache]: Analyzing trace with hash 926686654, now seen corresponding path program 14 times [2022-01-31 07:31:37,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:31:37,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128338327] [2022-01-31 07:31:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:31:37,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:31:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:31:37,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:31:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:31:37,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 07:31:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:31:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 07:31:37,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:31:37,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128338327] [2022-01-31 07:31:37,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128338327] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:31:37,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256360359] [2022-01-31 07:31:37,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:31:37,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:31:37,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:31:37,864 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:31:37,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-31 07:31:38,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:31:38,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:31:38,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 86 conjunts are in the unsatisfiable core [2022-01-31 07:31:38,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:31:38,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 07:31:38,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 07:31:38,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:31:38,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:31:38,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:31:38,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 07:31:38,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 07:31:39,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 11 [2022-01-31 07:31:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:31:39,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:31:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-31 07:31:40,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256360359] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:31:40,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:31:40,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 30, 19] total 60 [2022-01-31 07:31:40,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099162524] [2022-01-31 07:31:40,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:31:40,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 07:31:40,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:31:40,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 07:31:40,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=3331, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 07:31:40,547 INFO L87 Difference]: Start difference. First operand 867 states and 1085 transitions. Second operand has 60 states, 60 states have (on average 2.3333333333333335) internal successors, (140), 59 states have internal predecessors, (140), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:31:46,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:31:46,200 INFO L93 Difference]: Finished difference Result 1969 states and 2502 transitions. [2022-01-31 07:31:46,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 07:31:46,201 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.3333333333333335) internal successors, (140), 59 states have internal predecessors, (140), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 73 [2022-01-31 07:31:46,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:31:46,204 INFO L225 Difference]: With dead ends: 1969 [2022-01-31 07:31:46,204 INFO L226 Difference]: Without dead ends: 1969 [2022-01-31 07:31:46,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 120 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2190 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=585, Invalid=8921, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 07:31:46,204 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 704 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 7793 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 8087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 7793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:31:46,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 238 Invalid, 8087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 7793 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-01-31 07:31:46,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2022-01-31 07:31:46,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 873. [2022-01-31 07:31:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 797 states have (on average 1.2371392722710164) internal successors, (986), 811 states have internal predecessors, (986), 22 states have call successors, (22), 14 states have call predecessors, (22), 53 states have return successors, (81), 47 states have call predecessors, (81), 20 states have call successors, (81) [2022-01-31 07:31:46,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1089 transitions. [2022-01-31 07:31:46,216 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1089 transitions. Word has length 73 [2022-01-31 07:31:46,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:31:46,216 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1089 transitions. [2022-01-31 07:31:46,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.3333333333333335) internal successors, (140), 59 states have internal predecessors, (140), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:31:46,216 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1089 transitions. [2022-01-31 07:31:46,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 07:31:46,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:31:46,218 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 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] [2022-01-31 07:31:46,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-31 07:31:46,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:31:46,424 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:31:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:31:46,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1418127928, now seen corresponding path program 15 times [2022-01-31 07:31:46,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:31:46,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818086241] [2022-01-31 07:31:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:31:46,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:31:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:31:46,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:31:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:31:46,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 07:31:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:31:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 07:31:47,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:31:47,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818086241] [2022-01-31 07:31:47,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818086241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:31:47,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144838997] [2022-01-31 07:31:47,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:31:47,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:31:47,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:31:47,069 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:31:47,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-31 07:31:48,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-31 07:31:48,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:31:48,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 87 conjunts are in the unsatisfiable core [2022-01-31 07:31:48,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:31:48,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 07:31:49,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 07:31:49,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:31:49,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:31:49,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:31:49,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 07:31:49,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 07:31:49,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 11 [2022-01-31 07:31:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:31:49,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:31:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-31 07:31:50,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144838997] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:31:50,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:31:50,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 30, 19] total 60 [2022-01-31 07:31:50,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997475052] [2022-01-31 07:31:50,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:31:50,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 07:31:50,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:31:50,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 07:31:50,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=3333, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 07:31:50,872 INFO L87 Difference]: Start difference. First operand 873 states and 1089 transitions. Second operand has 60 states, 60 states have (on average 2.3333333333333335) internal successors, (140), 59 states have internal predecessors, (140), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:31:56,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:31:56,889 INFO L93 Difference]: Finished difference Result 1412 states and 1781 transitions. [2022-01-31 07:31:56,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 07:31:56,889 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.3333333333333335) internal successors, (140), 59 states have internal predecessors, (140), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 73 [2022-01-31 07:31:56,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:31:56,891 INFO L225 Difference]: With dead ends: 1412 [2022-01-31 07:31:56,891 INFO L226 Difference]: Without dead ends: 1412 [2022-01-31 07:31:56,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=599, Invalid=8907, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 07:31:56,892 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 505 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 8889 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 9085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 8889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-01-31 07:31:56,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 296 Invalid, 9085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 8889 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-01-31 07:31:56,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2022-01-31 07:31:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 878. [2022-01-31 07:31:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 801 states have (on average 1.2322097378277153) internal successors, (987), 815 states have internal predecessors, (987), 22 states have call successors, (22), 14 states have call predecessors, (22), 54 states have return successors, (82), 48 states have call predecessors, (82), 20 states have call successors, (82) [2022-01-31 07:31:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1091 transitions. [2022-01-31 07:31:56,902 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1091 transitions. Word has length 73 [2022-01-31 07:31:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:31:56,902 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1091 transitions. [2022-01-31 07:31:56,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.3333333333333335) internal successors, (140), 59 states have internal predecessors, (140), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:31:56,902 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1091 transitions. [2022-01-31 07:31:56,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 07:31:56,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:31:56,904 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 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] [2022-01-31 07:31:56,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-31 07:31:57,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:31:57,110 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:31:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:31:57,111 INFO L85 PathProgramCache]: Analyzing trace with hash 401609598, now seen corresponding path program 16 times [2022-01-31 07:31:57,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:31:57,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661893165] [2022-01-31 07:31:57,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:31:57,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:31:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:31:57,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:31:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:31:57,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 07:31:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:31:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 07:31:57,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:31:57,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661893165] [2022-01-31 07:31:57,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661893165] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:31:57,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547955043] [2022-01-31 07:31:57,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:31:57,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:31:57,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:31:57,904 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:31:57,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-31 07:31:58,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:31:58,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:31:58,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 84 conjunts are in the unsatisfiable core [2022-01-31 07:31:58,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:31:58,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 07:31:58,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 07:31:58,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:31:58,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:31:58,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:31:58,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:31:58,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:31:59,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 11 [2022-01-31 07:31:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:31:59,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:32:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-31 07:32:00,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547955043] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:32:00,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:32:00,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29, 19] total 59 [2022-01-31 07:32:00,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945817] [2022-01-31 07:32:00,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:32:00,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 07:32:00,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:32:00,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 07:32:00,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=3217, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 07:32:00,232 INFO L87 Difference]: Start difference. First operand 878 states and 1091 transitions. Second operand has 59 states, 59 states have (on average 2.3728813559322033) internal successors, (140), 58 states have internal predecessors, (140), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:32:05,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:32:05,206 INFO L93 Difference]: Finished difference Result 1423 states and 1795 transitions. [2022-01-31 07:32:05,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 07:32:05,206 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.3728813559322033) internal successors, (140), 58 states have internal predecessors, (140), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 73 [2022-01-31 07:32:05,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:32:05,209 INFO L225 Difference]: With dead ends: 1423 [2022-01-31 07:32:05,209 INFO L226 Difference]: Without dead ends: 1423 [2022-01-31 07:32:05,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 116 SyntacticMatches, 7 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=552, Invalid=8190, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 07:32:05,209 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 464 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 6673 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 6835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 6673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 07:32:05,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 240 Invalid, 6835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 6673 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 07:32:05,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2022-01-31 07:32:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 891. [2022-01-31 07:32:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 813 states have (on average 1.2324723247232472) internal successors, (1002), 827 states have internal predecessors, (1002), 22 states have call successors, (22), 14 states have call predecessors, (22), 55 states have return successors, (83), 49 states have call predecessors, (83), 20 states have call successors, (83) [2022-01-31 07:32:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1107 transitions. [2022-01-31 07:32:05,219 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1107 transitions. Word has length 73 [2022-01-31 07:32:05,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:32:05,221 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 1107 transitions. [2022-01-31 07:32:05,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.3728813559322033) internal successors, (140), 58 states have internal predecessors, (140), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:32:05,222 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1107 transitions. [2022-01-31 07:32:05,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 07:32:05,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:32:05,223 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:32:05,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-31 07:32:05,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:32:05,431 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:32:05,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:32:05,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1714703697, now seen corresponding path program 9 times [2022-01-31 07:32:05,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:32:05,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128005594] [2022-01-31 07:32:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:32:05,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:32:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:32:05,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:32:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:32:05,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 07:32:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:32:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-31 07:32:05,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:32:05,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128005594] [2022-01-31 07:32:05,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128005594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:32:05,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306884296] [2022-01-31 07:32:05,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:32:05,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:32:05,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:32:05,670 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:32:05,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-31 07:32:06,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-31 07:32:06,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:32:06,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 83 conjunts are in the unsatisfiable core [2022-01-31 07:32:06,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:32:06,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 07:32:06,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 07:32:07,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:32:07,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:32:07,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:32:07,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:32:07,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 07:32:07,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 11 [2022-01-31 07:32:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:32:07,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:32:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 18 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-31 07:32:08,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306884296] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:32:08,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:32:08,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28, 17] total 55 [2022-01-31 07:32:08,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084644992] [2022-01-31 07:32:08,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:32:08,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 07:32:08,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:32:08,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 07:32:08,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2792, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 07:32:08,754 INFO L87 Difference]: Start difference. First operand 891 states and 1107 transitions. Second operand has 55 states, 55 states have (on average 2.727272727272727) internal successors, (150), 54 states have internal predecessors, (150), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:32:22,803 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 07:32:23,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:32:23,829 INFO L93 Difference]: Finished difference Result 2807 states and 3580 transitions. [2022-01-31 07:32:23,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 07:32:23,830 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.727272727272727) internal successors, (150), 54 states have internal predecessors, (150), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 75 [2022-01-31 07:32:23,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:32:23,833 INFO L225 Difference]: With dead ends: 2807 [2022-01-31 07:32:23,834 INFO L226 Difference]: Without dead ends: 2560 [2022-01-31 07:32:23,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4553 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1321, Invalid=15971, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 07:32:23,835 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 1133 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 11078 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 11585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 11078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:32:23,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1133 Valid, 299 Invalid, 11585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 11078 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-01-31 07:32:23,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2022-01-31 07:32:23,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 1057. [2022-01-31 07:32:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 976 states have (on average 1.2192622950819672) internal successors, (1190), 980 states have internal predecessors, (1190), 23 states have call successors, (23), 14 states have call predecessors, (23), 57 states have return successors, (101), 62 states have call predecessors, (101), 21 states have call successors, (101) [2022-01-31 07:32:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1314 transitions. [2022-01-31 07:32:23,849 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1314 transitions. Word has length 75 [2022-01-31 07:32:23,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:32:23,849 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 1314 transitions. [2022-01-31 07:32:23,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.727272727272727) internal successors, (150), 54 states have internal predecessors, (150), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 07:32:23,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1314 transitions. [2022-01-31 07:32:23,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 07:32:23,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:32:23,851 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2022-01-31 07:32:23,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-31 07:32:24,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:32:24,057 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:32:24,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:32:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash -992926368, now seen corresponding path program 17 times [2022-01-31 07:32:24,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:32:24,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987138696] [2022-01-31 07:32:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:32:24,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:32:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:32:24,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:32:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:32:24,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 07:32:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:32:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 07:32:24,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:32:24,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987138696] [2022-01-31 07:32:24,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987138696] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:32:24,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783151034] [2022-01-31 07:32:24,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:32:24,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:32:24,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:32:24,874 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:32:24,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-31 07:33:05,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-31 07:33:05,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:33:05,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 07:33:05,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:33:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 07:33:06,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:33:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 07:33:07,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783151034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:33:07,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:33:07,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17, 17] total 46 [2022-01-31 07:33:07,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674523947] [2022-01-31 07:33:07,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:33:07,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 07:33:07,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:33:07,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 07:33:07,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 07:33:07,484 INFO L87 Difference]: Start difference. First operand 1057 states and 1314 transitions. Second operand has 46 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 45 states have internal predecessors, (107), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:33:11,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:33:11,392 INFO L93 Difference]: Finished difference Result 2011 states and 2592 transitions. [2022-01-31 07:33:11,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 07:33:11,393 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 45 states have internal predecessors, (107), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 76 [2022-01-31 07:33:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:33:11,396 INFO L225 Difference]: With dead ends: 2011 [2022-01-31 07:33:11,397 INFO L226 Difference]: Without dead ends: 2011 [2022-01-31 07:33:11,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=512, Invalid=4318, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 07:33:11,397 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 601 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 3999 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 4188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 3999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 07:33:11,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 203 Invalid, 4188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 3999 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 07:33:11,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2022-01-31 07:33:11,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1097. [2022-01-31 07:33:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1006 states have (on average 1.2256461232604374) internal successors, (1233), 1020 states have internal predecessors, (1233), 25 states have call successors, (25), 14 states have call predecessors, (25), 65 states have return successors, (143), 62 states have call predecessors, (143), 23 states have call successors, (143) [2022-01-31 07:33:11,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1401 transitions. [2022-01-31 07:33:11,413 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1401 transitions. Word has length 76 [2022-01-31 07:33:11,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:33:11,413 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1401 transitions. [2022-01-31 07:33:11,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 45 states have internal predecessors, (107), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:33:11,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1401 transitions. [2022-01-31 07:33:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 07:33:11,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:33:11,416 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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] [2022-01-31 07:33:11,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-31 07:33:11,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:33:11,626 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:33:11,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:33:11,626 INFO L85 PathProgramCache]: Analyzing trace with hash -377411901, now seen corresponding path program 2 times [2022-01-31 07:33:11,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:33:11,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370703165] [2022-01-31 07:33:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:33:11,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:33:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:33:11,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:33:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:33:11,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 07:33:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:33:11,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 07:33:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:33:11,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 07:33:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:33:11,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 07:33:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:33:11,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 07:33:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:33:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-31 07:33:11,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:33:11,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370703165] [2022-01-31 07:33:11,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370703165] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:33:11,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534274238] [2022-01-31 07:33:11,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:33:11,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:33:11,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:33:11,891 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:33:11,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-31 07:33:12,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:33:12,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:33:12,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-31 07:33:12,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:33:12,564 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 07:33:12,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2022-01-31 07:33:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 07:33:12,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:33:12,976 INFO L353 Elim1Store]: treesize reduction 30, result has 73.2 percent of original size [2022-01-31 07:33:12,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 89 [2022-01-31 07:33:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 07:33:13,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534274238] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:33:13,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:33:13,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 15] total 40 [2022-01-31 07:33:13,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678877868] [2022-01-31 07:33:13,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:33:13,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 07:33:13,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:33:13,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 07:33:13,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1459, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 07:33:13,693 INFO L87 Difference]: Start difference. First operand 1097 states and 1401 transitions. Second operand has 40 states, 39 states have (on average 3.2564102564102564) internal successors, (127), 39 states have internal predecessors, (127), 12 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 07:33:18,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:33:18,290 INFO L93 Difference]: Finished difference Result 1565 states and 2004 transitions. [2022-01-31 07:33:18,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 07:33:18,291 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.2564102564102564) internal successors, (127), 39 states have internal predecessors, (127), 12 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 82 [2022-01-31 07:33:18,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:33:18,293 INFO L225 Difference]: With dead ends: 1565 [2022-01-31 07:33:18,293 INFO L226 Difference]: Without dead ends: 1424 [2022-01-31 07:33:18,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 154 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=582, Invalid=6224, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 07:33:18,294 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 338 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 5120 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 5295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 5120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 07:33:18,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 228 Invalid, 5295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 5120 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 07:33:18,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2022-01-31 07:33:18,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1097. [2022-01-31 07:33:18,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1005 states have (on average 1.2189054726368158) internal successors, (1225), 1017 states have internal predecessors, (1225), 26 states have call successors, (26), 14 states have call predecessors, (26), 65 states have return successors, (147), 65 states have call predecessors, (147), 24 states have call successors, (147) [2022-01-31 07:33:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1398 transitions. [2022-01-31 07:33:18,315 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1398 transitions. Word has length 82 [2022-01-31 07:33:18,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:33:18,315 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1398 transitions. [2022-01-31 07:33:18,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.2564102564102564) internal successors, (127), 39 states have internal predecessors, (127), 12 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 07:33:18,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1398 transitions. [2022-01-31 07:33:18,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 07:33:18,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:33:18,318 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 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] [2022-01-31 07:33:18,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-31 07:33:18,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-31 07:33:18,519 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:33:18,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:33:18,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1319782018, now seen corresponding path program 18 times [2022-01-31 07:33:18,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:33:18,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646186915] [2022-01-31 07:33:18,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:33:18,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:33:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:33:18,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:33:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:33:18,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 07:33:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:33:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-01-31 07:33:19,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:33:19,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646186915] [2022-01-31 07:33:19,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646186915] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:33:19,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133054671] [2022-01-31 07:33:19,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 07:33:19,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:33:19,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:33:19,071 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:33:19,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-31 07:33:37,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-31 07:33:37,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:33:37,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 07:33:37,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:33:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-01-31 07:33:37,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:33:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-01-31 07:33:38,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133054671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:33:38,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:33:38,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 17] total 44 [2022-01-31 07:33:38,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695528199] [2022-01-31 07:33:38,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:33:38,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 07:33:38,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:33:38,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 07:33:38,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1667, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 07:33:38,683 INFO L87 Difference]: Start difference. First operand 1097 states and 1398 transitions. Second operand has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 43 states have internal predecessors, (114), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:33:42,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:33:42,356 INFO L93 Difference]: Finished difference Result 2152 states and 2831 transitions. [2022-01-31 07:33:42,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 07:33:42,356 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 43 states have internal predecessors, (114), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 78 [2022-01-31 07:33:42,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:33:42,361 INFO L225 Difference]: With dead ends: 2152 [2022-01-31 07:33:42,361 INFO L226 Difference]: Without dead ends: 2152 [2022-01-31 07:33:42,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 134 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=626, Invalid=4776, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 07:33:42,362 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1017 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 3575 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1033 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 3734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 3575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 07:33:42,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1033 Valid, 193 Invalid, 3734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 3575 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 07:33:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2022-01-31 07:33:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1012. [2022-01-31 07:33:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 921 states have (on average 1.225841476655809) internal successors, (1129), 938 states have internal predecessors, (1129), 25 states have call successors, (25), 14 states have call predecessors, (25), 65 states have return successors, (123), 59 states have call predecessors, (123), 23 states have call successors, (123) [2022-01-31 07:33:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1277 transitions. [2022-01-31 07:33:42,378 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1277 transitions. Word has length 78 [2022-01-31 07:33:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:33:42,378 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 1277 transitions. [2022-01-31 07:33:42,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 43 states have internal predecessors, (114), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:33:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1277 transitions. [2022-01-31 07:33:42,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 07:33:42,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:33:42,380 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 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] [2022-01-31 07:33:42,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-31 07:33:42,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-31 07:33:42,588 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:33:42,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:33:42,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1618464388, now seen corresponding path program 19 times [2022-01-31 07:33:42,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:33:42,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960863432] [2022-01-31 07:33:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:33:42,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:33:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:33:42,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:33:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:33:42,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 07:33:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:33:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-01-31 07:33:42,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:33:42,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960863432] [2022-01-31 07:33:42,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960863432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:33:42,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258416441] [2022-01-31 07:33:42,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 07:33:42,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:33:42,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:33:42,858 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:33:42,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-31 07:33:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:33:43,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 68 conjunts are in the unsatisfiable core [2022-01-31 07:33:43,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:33:43,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 07:33:43,929 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 07:33:43,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2022-01-31 07:33:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 18 proven. 114 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:33:43,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:33:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 40 proven. 30 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-31 07:33:44,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258416441] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:33:44,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:33:44,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 15] total 46 [2022-01-31 07:33:44,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161808932] [2022-01-31 07:33:44,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:33:44,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 07:33:44,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:33:44,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 07:33:44,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1946, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 07:33:44,661 INFO L87 Difference]: Start difference. First operand 1012 states and 1277 transitions. Second operand has 46 states, 46 states have (on average 2.891304347826087) internal successors, (133), 45 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:33:58,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:33:58,670 INFO L93 Difference]: Finished difference Result 3381 states and 4301 transitions. [2022-01-31 07:33:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 07:33:58,671 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.891304347826087) internal successors, (133), 45 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 80 [2022-01-31 07:33:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:33:58,675 INFO L225 Difference]: With dead ends: 3381 [2022-01-31 07:33:58,675 INFO L226 Difference]: Without dead ends: 3377 [2022-01-31 07:33:58,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6685 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1528, Invalid=21728, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 07:33:58,677 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 857 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 12098 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 12468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 12098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-01-31 07:33:58,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 354 Invalid, 12468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 12098 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-01-31 07:33:58,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2022-01-31 07:33:58,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 1015. [2022-01-31 07:33:58,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 924 states have (on average 1.224025974025974) internal successors, (1131), 941 states have internal predecessors, (1131), 25 states have call successors, (25), 14 states have call predecessors, (25), 65 states have return successors, (123), 59 states have call predecessors, (123), 23 states have call successors, (123) [2022-01-31 07:33:58,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1279 transitions. [2022-01-31 07:33:58,697 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1279 transitions. Word has length 80 [2022-01-31 07:33:58,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:33:58,697 INFO L470 AbstractCegarLoop]: Abstraction has 1015 states and 1279 transitions. [2022-01-31 07:33:58,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.891304347826087) internal successors, (133), 45 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:33:58,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1279 transitions. [2022-01-31 07:33:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 07:33:58,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:33:58,699 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:33:58,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-31 07:33:58,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-31 07:33:58,919 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:33:58,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:33:58,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1684823843, now seen corresponding path program 10 times [2022-01-31 07:33:58,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:33:58,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729265507] [2022-01-31 07:33:58,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:33:58,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:33:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:33:59,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:33:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:33:59,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 07:33:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:33:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-31 07:33:59,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:33:59,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729265507] [2022-01-31 07:33:59,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729265507] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:33:59,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242490858] [2022-01-31 07:33:59,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:33:59,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:33:59,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:33:59,536 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:33:59,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-31 07:33:59,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:33:59,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:33:59,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 07:33:59,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:34:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-01-31 07:34:00,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:34:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-01-31 07:34:01,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242490858] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:34:01,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:34:01,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16, 17] total 54 [2022-01-31 07:34:01,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741423867] [2022-01-31 07:34:01,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:34:01,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 07:34:01,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:34:01,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 07:34:01,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2632, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 07:34:01,818 INFO L87 Difference]: Start difference. First operand 1015 states and 1279 transitions. Second operand has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)