/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-cav19/array_init_var_plus_ind3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 10:38:48,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 10:38:48,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 10:38:48,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 10:38:48,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 10:38:48,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 10:38:48,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 10:38:48,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 10:38:48,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 10:38:48,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 10:38:48,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 10:38:48,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 10:38:48,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 10:38:48,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 10:38:48,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 10:38:48,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 10:38:48,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 10:38:48,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 10:38:48,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 10:38:48,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 10:38:48,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 10:38:48,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 10:38:48,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 10:38:48,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 10:38:48,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 10:38:48,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 10:38:48,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 10:38:48,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 10:38:48,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 10:38:48,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 10:38:48,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 10:38:48,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 10:38:48,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 10:38:48,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 10:38:48,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 10:38:48,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 10:38:48,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 10:38:48,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 10:38:48,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 10:38:48,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 10:38:48,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 10:38:48,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 10:38:48,220 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 10:38:48,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 10:38:48,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 10:38:48,221 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 10:38:48,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 10:38:48,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 10:38:48,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 10:38:48,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 10:38:48,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 10:38:48,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 10:38:48,221 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 10:38:48,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 10:38:48,221 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 10:38:48,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 10:38:48,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 10:38:48,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 10:38:48,222 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 10:38:48,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 10:38:48,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:38:48,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 10:38:48,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 10:38:48,222 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 10:38:48,222 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 10:38:48,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 10:38:48,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 10:38:48,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 10:38:48,402 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 10:38:48,402 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 10:38:48,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_var_plus_ind3.c [2022-01-31 10:38:48,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40ea7a55a/070277780b1c4722b95f3deb6cd8eaa2/FLAGd30d97aa1 [2022-01-31 10:38:48,754 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 10:38:48,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_var_plus_ind3.c [2022-01-31 10:38:48,761 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40ea7a55a/070277780b1c4722b95f3deb6cd8eaa2/FLAGd30d97aa1 [2022-01-31 10:38:49,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40ea7a55a/070277780b1c4722b95f3deb6cd8eaa2 [2022-01-31 10:38:49,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 10:38:49,186 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 10:38:49,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 10:38:49,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 10:38:49,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 10:38:49,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:38:49" (1/1) ... [2022-01-31 10:38:49,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b72a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:49, skipping insertion in model container [2022-01-31 10:38:49,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:38:49" (1/1) ... [2022-01-31 10:38:49,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 10:38:49,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 10:38:49,323 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-cav19/array_init_var_plus_ind3.c[415,428] [2022-01-31 10:38:49,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:38:49,340 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 10:38:49,347 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-cav19/array_init_var_plus_ind3.c[415,428] [2022-01-31 10:38:49,350 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:38:49,360 INFO L208 MainTranslator]: Completed translation [2022-01-31 10:38:49,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:49 WrapperNode [2022-01-31 10:38:49,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 10:38:49,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 10:38:49,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 10:38:49,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 10:38:49,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:49" (1/1) ... [2022-01-31 10:38:49,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:49" (1/1) ... [2022-01-31 10:38:49,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:49" (1/1) ... [2022-01-31 10:38:49,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:49" (1/1) ... [2022-01-31 10:38:49,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:49" (1/1) ... [2022-01-31 10:38:49,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:49" (1/1) ... [2022-01-31 10:38:49,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:49" (1/1) ... [2022-01-31 10:38:49,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 10:38:49,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 10:38:49,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 10:38:49,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 10:38:49,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:49" (1/1) ... [2022-01-31 10:38:49,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:38:49,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:38:49,404 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 10:38:49,405 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 10:38:49,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 10:38:49,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 10:38:49,442 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 10:38:49,442 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 10:38:49,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 10:38:49,443 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 10:38:49,448 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 10:38:49,448 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 10:38:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 10:38:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 10:38:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 10:38:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 10:38:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 10:38:49,450 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 10:38:49,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 10:38:49,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 10:38:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 10:38:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 10:38:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 10:38:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 10:38:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 10:38:49,516 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 10:38:49,517 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 10:38:49,667 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 10:38:49,671 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 10:38:49,671 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 10:38:49,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:38:49 BoogieIcfgContainer [2022-01-31 10:38:49,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 10:38:49,672 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 10:38:49,672 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 10:38:49,688 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 10:38:49,690 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:38:49" (1/1) ... [2022-01-31 10:38:49,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:38:49 BasicIcfg [2022-01-31 10:38:49,702 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 10:38:49,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 10:38:49,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 10:38:49,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 10:38:49,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:38:49" (1/4) ... [2022-01-31 10:38:49,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6641cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:38:49, skipping insertion in model container [2022-01-31 10:38:49,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:49" (2/4) ... [2022-01-31 10:38:49,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6641cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:38:49, skipping insertion in model container [2022-01-31 10:38:49,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:38:49" (3/4) ... [2022-01-31 10:38:49,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6641cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:38:49, skipping insertion in model container [2022-01-31 10:38:49,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:38:49" (4/4) ... [2022-01-31 10:38:49,726 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind3.cJordan [2022-01-31 10:38:49,729 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 10:38:49,729 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 10:38:49,767 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 10:38:49,771 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 10:38:49,772 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 10:38:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:38:49,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 10:38:49,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:49,799 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:49,799 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:49,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:49,803 INFO L85 PathProgramCache]: Analyzing trace with hash 642585017, now seen corresponding path program 1 times [2022-01-31 10:38:49,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:49,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794341100] [2022-01-31 10:38:49,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:49,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:49,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:49,967 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 10:38:49,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:49,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794341100] [2022-01-31 10:38:49,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794341100] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:38:49,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:38:49,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:38:49,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009142072] [2022-01-31 10:38:49,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:38:49,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:38:49,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:49,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:38:49,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:38:49,997 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:50,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:50,026 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-01-31 10:38:50,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:38:50,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 10:38:50,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:50,038 INFO L225 Difference]: With dead ends: 25 [2022-01-31 10:38:50,038 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 10:38:50,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 10:38:50,042 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:50,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 26 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:38:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 10:38:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 10:38:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:38:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-31 10:38:50,063 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-01-31 10:38:50,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:50,063 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-31 10:38:50,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:50,064 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-31 10:38:50,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 10:38:50,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:50,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:50,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 10:38:50,065 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:50,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:50,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1530088698, now seen corresponding path program 1 times [2022-01-31 10:38:50,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:50,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138371558] [2022-01-31 10:38:50,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:50,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:50,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:50,149 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 10:38:50,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:50,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138371558] [2022-01-31 10:38:50,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138371558] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:38:50,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:38:50,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 10:38:50,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760198618] [2022-01-31 10:38:50,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:38:50,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 10:38:50,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:50,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 10:38:50,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:38:50,152 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:50,208 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-01-31 10:38:50,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 10:38:50,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 10:38:50,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:50,210 INFO L225 Difference]: With dead ends: 28 [2022-01-31 10:38:50,210 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 10:38:50,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 10:38:50,211 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:50,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 19 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:38:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 10:38:50,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2022-01-31 10:38:50,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:38:50,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-31 10:38:50,217 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2022-01-31 10:38:50,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:50,217 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-31 10:38:50,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-31 10:38:50,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 10:38:50,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:50,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:50,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 10:38:50,220 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:50,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:50,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1622551480, now seen corresponding path program 1 times [2022-01-31 10:38:50,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:50,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783991788] [2022-01-31 10:38:50,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:50,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:50,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:50,271 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 10:38:50,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:50,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783991788] [2022-01-31 10:38:50,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783991788] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:38:50,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:38:50,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 10:38:50,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609460255] [2022-01-31 10:38:50,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:38:50,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 10:38:50,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:50,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 10:38:50,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:38:50,273 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:50,320 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-01-31 10:38:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 10:38:50,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 10:38:50,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:50,321 INFO L225 Difference]: With dead ends: 25 [2022-01-31 10:38:50,321 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 10:38:50,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 10:38:50,322 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:50,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 28 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:38:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 10:38:50,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-01-31 10:38:50,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:38:50,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 10:38:50,325 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2022-01-31 10:38:50,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:50,325 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 10:38:50,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:50,325 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 10:38:50,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 10:38:50,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:50,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:50,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 10:38:50,326 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:50,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:50,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2003313729, now seen corresponding path program 1 times [2022-01-31 10:38:50,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:50,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510916017] [2022-01-31 10:38:50,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:50,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:50,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:50,373 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 10:38:50,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:50,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510916017] [2022-01-31 10:38:50,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510916017] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:38:50,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346191302] [2022-01-31 10:38:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:50,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:50,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:38:50,375 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 10:38:50,376 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 10:38:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:50,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 10:38:50,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:38:50,503 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 10:38:50,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:38:50,555 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 10:38:50,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346191302] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:38:50,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:38:50,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-01-31 10:38:50,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109171942] [2022-01-31 10:38:50,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:38:50,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:38:50,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:50,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:38:50,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:38:50,557 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 10:38:50,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:50,685 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-01-31 10:38:50,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 10:38:50,686 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 16 [2022-01-31 10:38:50,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:50,686 INFO L225 Difference]: With dead ends: 42 [2022-01-31 10:38:50,687 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 10:38:50,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:38:50,688 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 92 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:50,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 32 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:38:50,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 10:38:50,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2022-01-31 10:38:50,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:38:50,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-01-31 10:38:50,691 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 16 [2022-01-31 10:38:50,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:50,691 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-01-31 10:38:50,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 10:38:50,692 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-01-31 10:38:50,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 10:38:50,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:50,692 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:50,714 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 10:38:50,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:50,914 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:50,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:50,915 INFO L85 PathProgramCache]: Analyzing trace with hash -980827736, now seen corresponding path program 1 times [2022-01-31 10:38:50,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:50,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065217763] [2022-01-31 10:38:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:50,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:50,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:50,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:50,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065217763] [2022-01-31 10:38:50,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065217763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:38:50,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373535149] [2022-01-31 10:38:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:50,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:50,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:38:50,987 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 10:38:51,024 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 10:38:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:51,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 10:38:51,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:38:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:51,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:38:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:51,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373535149] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:38:51,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:38:51,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-01-31 10:38:51,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991416139] [2022-01-31 10:38:51,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:38:51,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:38:51,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:51,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:38:51,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:38:51,150 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:51,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:51,321 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-01-31 10:38:51,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 10:38:51,321 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 10:38:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:51,323 INFO L225 Difference]: With dead ends: 41 [2022-01-31 10:38:51,323 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 10:38:51,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2022-01-31 10:38:51,324 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:51,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 48 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:38:51,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 10:38:51,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-01-31 10:38:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:38:51,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-01-31 10:38:51,342 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 20 [2022-01-31 10:38:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:51,343 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-01-31 10:38:51,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:51,343 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-01-31 10:38:51,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 10:38:51,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:51,343 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:51,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 10:38:51,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:51,544 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:51,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:51,545 INFO L85 PathProgramCache]: Analyzing trace with hash 2031011585, now seen corresponding path program 2 times [2022-01-31 10:38:51,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:51,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724663215] [2022-01-31 10:38:51,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:51,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:51,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:51,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:51,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724663215] [2022-01-31 10:38:51,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724663215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:38:51,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176263744] [2022-01-31 10:38:51,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:38:51,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:51,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:38:51,630 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 10:38:51,631 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 10:38:51,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:38:51,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:38:51,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:38:51,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:38:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:51,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:38:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:51,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176263744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:38:51,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:38:51,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-31 10:38:51,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042264605] [2022-01-31 10:38:51,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:38:51,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 10:38:51,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 10:38:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=305, Unknown=0, NotChecked=0, Total=506 [2022-01-31 10:38:51,893 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 21 states have internal predecessors, (61), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:38:52,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:52,181 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2022-01-31 10:38:52,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 10:38:52,182 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 21 states have internal predecessors, (61), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-01-31 10:38:52,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:52,183 INFO L225 Difference]: With dead ends: 89 [2022-01-31 10:38:52,183 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 10:38:52,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=443, Invalid=817, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 10:38:52,184 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 229 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:52,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 27 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:38:52,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 10:38:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2022-01-31 10:38:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:38:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-01-31 10:38:52,188 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 28 [2022-01-31 10:38:52,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:52,189 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-01-31 10:38:52,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 21 states have internal predecessors, (61), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:38:52,189 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-01-31 10:38:52,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 10:38:52,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:52,190 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:52,206 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 10:38:52,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:52,395 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:52,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:52,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1021156129, now seen corresponding path program 2 times [2022-01-31 10:38:52,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:52,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642514438] [2022-01-31 10:38:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:52,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:52,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:52,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:52,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642514438] [2022-01-31 10:38:52,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642514438] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:38:52,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739165564] [2022-01-31 10:38:52,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:38:52,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:52,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:38:52,641 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 10:38:52,643 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 10:38:52,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:38:52,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:38:52,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 10:38:52,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:38:52,787 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 10:38:52,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-01-31 10:38:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:52,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:38:52,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-01-31 10:38:52,972 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 32 treesize of output 28 [2022-01-31 10:38:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:53,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739165564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:38:53,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:38:53,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 32 [2022-01-31 10:38:53,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567579624] [2022-01-31 10:38:53,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:38:53,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 10:38:53,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:53,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 10:38:53,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-01-31 10:38:53,237 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 32 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:53,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:53,618 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-01-31 10:38:53,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 10:38:53,619 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 10:38:53,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:53,620 INFO L225 Difference]: With dead ends: 67 [2022-01-31 10:38:53,620 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 10:38:53,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 10:38:53,621 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:53,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 101 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 418 Invalid, 0 Unknown, 213 Unchecked, 0.2s Time] [2022-01-31 10:38:53,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 10:38:53,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2022-01-31 10:38:53,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 53 states have (on average 1.169811320754717) internal successors, (62), 54 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:38:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2022-01-31 10:38:53,626 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 29 [2022-01-31 10:38:53,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:53,626 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2022-01-31 10:38:53,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:53,626 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2022-01-31 10:38:53,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 10:38:53,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:53,627 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:53,649 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 10:38:53,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:53,839 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:53,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:53,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2040595560, now seen corresponding path program 3 times [2022-01-31 10:38:53,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:53,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134087835] [2022-01-31 10:38:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:53,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:54,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:54,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:54,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134087835] [2022-01-31 10:38:54,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134087835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:38:54,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283281749] [2022-01-31 10:38:54,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:38:54,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:54,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:38:54,064 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 10:38:54,065 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 10:38:54,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-31 10:38:54,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:38:54,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 10:38:54,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:38:54,209 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 10:38:54,260 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 10:38:54,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 10:38:54,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-01-31 10:38:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:54,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:38:56,508 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_46 Int)) (or (forall ((v_ArrVal_107 Int)) (<= (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* v_main_~i~0_46 4) |c_main_~#a~0.offset|) v_ArrVal_107) (+ 16 |c_main_~#a~0.offset|)) 0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_46)))) is different from false [2022-01-31 10:38:56,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-01-31 10:38:56,563 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 82 treesize of output 78 [2022-01-31 10:38:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-01-31 10:38:56,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283281749] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:38:56,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:38:56,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 36 [2022-01-31 10:38:56,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958909055] [2022-01-31 10:38:56,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:38:56,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 10:38:56,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:56,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 10:38:56,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1083, Unknown=1, NotChecked=66, Total=1260 [2022-01-31 10:38:56,988 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 36 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:59,238 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* c_main_~i~0 4) |c_main_~#a~0.offset|)) 6) 0) (<= (+ 6 c_main_~j~0) 0) (<= c_main_~i~0 4) (<= 4 c_main_~i~0) (forall ((v_main_~i~0_46 Int)) (or (forall ((v_ArrVal_107 Int)) (<= (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* v_main_~i~0_46 4) |c_main_~#a~0.offset|) v_ArrVal_107) (+ 16 |c_main_~#a~0.offset|)) 0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_46)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-01-31 10:38:59,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:59,565 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-01-31 10:38:59,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 10:38:59,566 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 10:38:59,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:59,566 INFO L225 Difference]: With dead ends: 75 [2022-01-31 10:38:59,566 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 10:38:59,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=225, Invalid=2331, Unknown=2, NotChecked=198, Total=2756 [2022-01-31 10:38:59,568 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:59,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 159 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 618 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-01-31 10:38:59,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 10:38:59,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2022-01-31 10:38:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 53 states have (on average 1.169811320754717) internal successors, (62), 54 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:38:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2022-01-31 10:38:59,572 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 32 [2022-01-31 10:38:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:59,572 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2022-01-31 10:38:59,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:59,572 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2022-01-31 10:38:59,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 10:38:59,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:59,573 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:59,603 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 10:38:59,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:59,789 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:59,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:59,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1848032831, now seen corresponding path program 4 times [2022-01-31 10:38:59,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:59,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521458322] [2022-01-31 10:38:59,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:59,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:00,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:39:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:39:00,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:39:00,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521458322] [2022-01-31 10:39:00,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521458322] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:39:00,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521266341] [2022-01-31 10:39:00,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:39:00,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:39:00,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:39:00,019 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 10:39:00,020 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 10:39:00,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:39:00,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:39:00,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 10:39:00,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:39:00,149 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 10:39:00,216 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:39:00,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-31 10:39:00,248 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:39:00,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-31 10:39:00,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-01-31 10:39:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:39:00,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:39:51,893 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_60 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_60)) (forall ((v_ArrVal_146 Int) (v_ArrVal_143 Int) (v_main_~i~0_59 Int)) (or (<= (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* v_main_~i~0_60 4) |c_main_~#a~0.offset|) v_ArrVal_143) (+ (* v_main_~i~0_59 4) |c_main_~#a~0.offset|) v_ArrVal_146) (+ 16 |c_main_~#a~0.offset|)) 0) (not (<= (+ v_main_~i~0_60 1) v_main_~i~0_59)))))) is different from false [2022-01-31 10:39:51,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 28 [2022-01-31 10:39:51,908 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 1610 treesize of output 1578 [2022-01-31 10:39:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-01-31 10:39:57,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521266341] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:39:57,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:39:57,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 19] total 39 [2022-01-31 10:39:57,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066663732] [2022-01-31 10:39:57,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:39:57,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 10:39:57,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:39:57,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 10:39:57,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1241, Unknown=40, NotChecked=72, Total=1482 [2022-01-31 10:39:57,554 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 39 states, 37 states have (on average 1.837837837837838) internal successors, (68), 36 states have internal predecessors, (68), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:40:13,790 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* c_main_~i~0 4) |c_main_~#a~0.offset|)) 6) 0) (<= (+ 6 c_main_~j~0) 0) (<= c_main_~i~0 4) (<= 4 c_main_~i~0) (forall ((v_main_~i~0_60 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_60)) (forall ((v_ArrVal_146 Int) (v_ArrVal_143 Int) (v_main_~i~0_59 Int)) (or (<= (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* v_main_~i~0_60 4) |c_main_~#a~0.offset|) v_ArrVal_143) (+ (* v_main_~i~0_59 4) |c_main_~#a~0.offset|) v_ArrVal_146) (+ 16 |c_main_~#a~0.offset|)) 0) (not (<= (+ v_main_~i~0_60 1) v_main_~i~0_59)))))) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-01-31 10:40:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:40:26,157 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2022-01-31 10:40:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 10:40:26,158 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.837837837837838) internal successors, (68), 36 states have internal predecessors, (68), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 10:40:26,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:40:26,159 INFO L225 Difference]: With dead ends: 78 [2022-01-31 10:40:26,159 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 10:40:26,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 80.1s TimeCoverageRelationStatistics Valid=293, Invalid=2631, Unknown=54, NotChecked=214, Total=3192 [2022-01-31 10:40:26,160 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 66 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:40:26,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 112 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 806 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2022-01-31 10:40:26,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 10:40:26,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2022-01-31 10:40:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:40:26,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2022-01-31 10:40:26,164 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 35 [2022-01-31 10:40:26,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:40:26,164 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2022-01-31 10:40:26,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.837837837837838) internal successors, (68), 36 states have internal predecessors, (68), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:40:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2022-01-31 10:40:26,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 10:40:26,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:40:26,165 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:40:26,185 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 10:40:26,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:40:26,376 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:40:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:40:26,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1247608086, now seen corresponding path program 1 times [2022-01-31 10:40:26,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:40:26,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708846602] [2022-01-31 10:40:26,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:40:26,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:40:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:26,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:40:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:26,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 10:40:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:40:26,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:40:26,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708846602] [2022-01-31 10:40:26,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708846602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:40:26,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165176810] [2022-01-31 10:40:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:40:26,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:40:26,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:40:26,453 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 10:40:26,454 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 10:40:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:26,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 10:40:26,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:40:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:40:26,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:40:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:40:26,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165176810] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:40:26,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:40:26,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 14 [2022-01-31 10:40:26,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012603908] [2022-01-31 10:40:26,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:40:26,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 10:40:26,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:40:26,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 10:40:26,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-01-31 10:40:26,645 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 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 10:40:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:40:26,756 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2022-01-31 10:40:26,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 10:40:26,756 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 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 37 [2022-01-31 10:40:26,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:40:26,756 INFO L225 Difference]: With dead ends: 66 [2022-01-31 10:40:26,757 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 10:40:26,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-01-31 10:40:26,757 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:40:26,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:40:26,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 10:40:26,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-31 10:40:26,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 53 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:40:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2022-01-31 10:40:26,760 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 37 [2022-01-31 10:40:26,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:40:26,760 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2022-01-31 10:40:26,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 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 10:40:26,761 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2022-01-31 10:40:26,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 10:40:26,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:40:26,761 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:40:26,781 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 10:40:26,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:40:26,962 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:40:26,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:40:26,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1151479645, now seen corresponding path program 2 times [2022-01-31 10:40:26,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:40:26,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843057652] [2022-01-31 10:40:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:40:26,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:40:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:27,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:40:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:27,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 10:40:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:40:27,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:40:27,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843057652] [2022-01-31 10:40:27,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843057652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:40:27,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526913691] [2022-01-31 10:40:27,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:40:27,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:40:27,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:40:27,244 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 10:40:27,296 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 10:40:27,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:40:27,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:40:27,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 10:40:27,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:40:27,514 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 10:40:27,730 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-31 10:40:27,730 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 25 treesize of output 12 [2022-01-31 10:40:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:40:27,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:40:27,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526913691] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:40:27,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:40:27,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 36 [2022-01-31 10:40:27,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929309230] [2022-01-31 10:40:27,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:40:27,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 10:40:27,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:40:27,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 10:40:27,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 10:40:27,882 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 36 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 33 states have internal predecessors, (64), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:40:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:40:28,310 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-01-31 10:40:28,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 10:40:28,310 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 33 states have internal predecessors, (64), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2022-01-31 10:40:28,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:40:28,310 INFO L225 Difference]: With dead ends: 75 [2022-01-31 10:40:28,310 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 10:40:28,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=2617, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 10:40:28,312 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:40:28,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 312 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 671 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time] [2022-01-31 10:40:28,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 10:40:28,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-31 10:40:28,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 53 states have internal predecessors, (59), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:40:28,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-01-31 10:40:28,314 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 40 [2022-01-31 10:40:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:40:28,314 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-01-31 10:40:28,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 33 states have internal predecessors, (64), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:40:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-01-31 10:40:28,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 10:40:28,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:40:28,315 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:40:28,331 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 10:40:28,523 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,SelfDestructingSolverStorable10 [2022-01-31 10:40:28,523 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:40:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:40:28,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2132280246, now seen corresponding path program 3 times [2022-01-31 10:40:28,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:40:28,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388748786] [2022-01-31 10:40:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:40:28,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:40:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:28,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:40:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:28,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 10:40:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:40:28,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:40:28,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388748786] [2022-01-31 10:40:28,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388748786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:40:28,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114663502] [2022-01-31 10:40:28,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:40:28,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:40:28,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:40:28,809 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 10:40:28,810 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 10:40:28,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-31 10:40:28,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:40:28,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 10:40:28,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:40:29,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 10:40:29,056 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 10:40:29,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 10:40:31,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-01-31 10:40:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:40:31,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:41:26,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-01-31 10:41:26,510 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 82 treesize of output 78 [2022-01-31 10:41:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:41:26,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114663502] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:41:26,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:41:26,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 44 [2022-01-31 10:41:26,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807159098] [2022-01-31 10:41:26,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:41:26,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 10:41:26,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:41:26,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 10:41:26,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1716, Unknown=30, NotChecked=0, Total=1892 [2022-01-31 10:41:26,871 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 44 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 41 states have internal predecessors, (83), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:42:05,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:42:05,545 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2022-01-31 10:42:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 10:42:05,545 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 41 states have internal predecessors, (83), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2022-01-31 10:42:05,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:42:05,546 INFO L225 Difference]: With dead ends: 80 [2022-01-31 10:42:05,546 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 10:42:05,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 96.2s TimeCoverageRelationStatistics Valid=317, Invalid=3794, Unknown=49, NotChecked=0, Total=4160 [2022-01-31 10:42:05,547 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:42:05,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 185 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 716 Invalid, 0 Unknown, 178 Unchecked, 0.3s Time] [2022-01-31 10:42:05,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 10:42:05,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2022-01-31 10:42:05,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.11864406779661) internal successors, (66), 60 states have internal predecessors, (66), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:42:05,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2022-01-31 10:42:05,550 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 43 [2022-01-31 10:42:05,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:42:05,551 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2022-01-31 10:42:05,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 41 states have internal predecessors, (83), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:42:05,551 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2022-01-31 10:42:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 10:42:05,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:42:05,551 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:42:05,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-31 10:42:05,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:42:05,752 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:42:05,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:42:05,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1794497347, now seen corresponding path program 4 times [2022-01-31 10:42:05,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:42:05,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789556209] [2022-01-31 10:42:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:42:05,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:42:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:06,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:42:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:06,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 10:42:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:42:06,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:42:06,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789556209] [2022-01-31 10:42:06,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789556209] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:42:06,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024479816] [2022-01-31 10:42:06,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:42:06,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:42:06,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:42:06,075 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 10:42:06,089 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 10:42:06,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:42:06,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:42:06,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-31 10:42:06,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:42:06,237 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 10:42:06,276 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:42:06,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-31 10:42:06,323 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:42:06,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-31 10:42:08,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-01-31 10:42:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:42:09,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:43:11,019 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_106 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_106)) (forall ((v_ArrVal_278 Int) (v_ArrVal_275 Int) (v_main_~i~0_105 Int)) (or (<= (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_106) |c_main_~#a~0.offset|) v_ArrVal_275) (+ (* 4 v_main_~i~0_105) |c_main_~#a~0.offset|) v_ArrVal_278) (+ 20 |c_main_~#a~0.offset|)) 0) (not (<= (+ v_main_~i~0_106 1) v_main_~i~0_105)))))) is different from false [2022-01-31 10:43:11,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 28 [2022-01-31 10:43:11,031 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 1610 treesize of output 1578 [2022-01-31 10:43:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2022-01-31 10:43:12,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024479816] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:43:12,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:43:12,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 47 [2022-01-31 10:43:12,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935202765] [2022-01-31 10:43:12,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:43:12,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 10:43:12,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:43:12,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 10:43:12,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1871, Unknown=40, NotChecked=88, Total=2162 [2022-01-31 10:43:12,184 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 47 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:43:24,509 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 5 c_main_~i~0) (<= (+ c_main_~j~0 10) 0) (<= (+ (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* c_main_~i~0 4) |c_main_~#a~0.offset|)) 10) 0) (forall ((v_main_~i~0_106 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_106)) (forall ((v_ArrVal_278 Int) (v_ArrVal_275 Int) (v_main_~i~0_105 Int)) (or (<= (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_106) |c_main_~#a~0.offset|) v_ArrVal_275) (+ (* 4 v_main_~i~0_105) |c_main_~#a~0.offset|) v_ArrVal_278) (+ 20 |c_main_~#a~0.offset|)) 0) (not (<= (+ v_main_~i~0_106 1) v_main_~i~0_105)))))) (<= c_main_~i~0 5) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-01-31 10:43:46,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:43:46,907 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2022-01-31 10:43:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 10:43:46,907 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2022-01-31 10:43:46,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:43:46,908 INFO L225 Difference]: With dead ends: 85 [2022-01-31 10:43:46,908 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 10:43:46,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 99.4s TimeCoverageRelationStatistics Valid=356, Invalid=4017, Unknown=57, NotChecked=262, Total=4692 [2022-01-31 10:43:46,909 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 70 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:43:46,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 156 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 854 Invalid, 0 Unknown, 153 Unchecked, 0.3s Time] [2022-01-31 10:43:46,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 10:43:46,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2022-01-31 10:43:46,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 59 states have internal predecessors, (65), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:43:46,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-01-31 10:43:46,912 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 46 [2022-01-31 10:43:46,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:43:46,913 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-01-31 10:43:46,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:43:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-01-31 10:43:46,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 10:43:46,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:43:46,914 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:43:46,941 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 10:43:47,133 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,SelfDestructingSolverStorable12 [2022-01-31 10:43:47,134 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:43:47,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:43:47,134 INFO L85 PathProgramCache]: Analyzing trace with hash -880541525, now seen corresponding path program 5 times [2022-01-31 10:43:47,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:43:47,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189269985] [2022-01-31 10:43:47,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:43:47,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:43:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:47,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:43:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:47,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 10:43:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:47,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 10:43:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:43:47,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:43:47,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189269985] [2022-01-31 10:43:47,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189269985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:43:47,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764985408] [2022-01-31 10:43:47,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:43:47,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:43:47,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:43:47,459 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 10:43:47,460 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 10:43:47,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 10:43:47,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:43:47,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 10:43:47,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:43:47,789 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 10:43:54,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-01-31 10:43:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:43:54,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:43:56,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-01-31 10:43:56,270 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 32 treesize of output 28 [2022-01-31 10:43:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:43:56,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764985408] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:43:56,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:43:56,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 21] total 59 [2022-01-31 10:43:56,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072092148] [2022-01-31 10:43:56,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:43:56,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 10:43:56,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:43:56,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 10:43:56,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=3196, Unknown=3, NotChecked=0, Total=3422 [2022-01-31 10:43:56,744 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 59 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:43:57,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:43:57,698 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2022-01-31 10:43:57,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 10:43:57,698 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 51 [2022-01-31 10:43:57,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:43:57,699 INFO L225 Difference]: With dead ends: 95 [2022-01-31 10:43:57,699 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 10:43:57,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=470, Invalid=6667, Unknown=3, NotChecked=0, Total=7140 [2022-01-31 10:43:57,700 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 61 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:43:57,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 216 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1145 Invalid, 0 Unknown, 382 Unchecked, 0.4s Time] [2022-01-31 10:43:57,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 10:43:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-01-31 10:43:57,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.103448275862069) internal successors, (64), 59 states have internal predecessors, (64), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:43:57,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-01-31 10:43:57,712 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 51 [2022-01-31 10:43:57,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:43:57,712 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-01-31 10:43:57,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 56 states have internal predecessors, (110), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:43:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-01-31 10:43:57,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 10:43:57,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:43:57,713 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:43:57,730 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 10:43:57,920 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,SelfDestructingSolverStorable13 [2022-01-31 10:43:57,920 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:43:57,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:43:57,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1348195662, now seen corresponding path program 6 times [2022-01-31 10:43:57,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:43:57,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044902804] [2022-01-31 10:43:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:43:57,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:43:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:58,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:43:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:58,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 10:43:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:58,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 10:43:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:43:58,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:43:58,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044902804] [2022-01-31 10:43:58,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044902804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:43:58,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816060764] [2022-01-31 10:43:58,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:43:58,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:43:58,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:43:58,283 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 10:43:58,298 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 10:43:58,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-31 10:43:58,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:43:58,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-31 10:43:58,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:43:58,482 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 10:43:58,536 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 10:43:58,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 10:44:10,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-01-31 10:44:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:44:10,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:45:19,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-01-31 10:45:19,060 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 82 treesize of output 78 [2022-01-31 10:45:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:45:19,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816060764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:45:19,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:45:19,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 23] total 51 [2022-01-31 10:45:19,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152487996] [2022-01-31 10:45:19,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:45:19,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 10:45:19,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:45:19,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 10:45:19,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2341, Unknown=37, NotChecked=0, Total=2550 [2022-01-31 10:45:19,519 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 51 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:46:06,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:46:06,807 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-01-31 10:46:06,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 10:46:06,808 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 54 [2022-01-31 10:46:06,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:46:06,808 INFO L225 Difference]: With dead ends: 93 [2022-01-31 10:46:06,808 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 10:46:06,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 81 SyntacticMatches, 9 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 127.8s TimeCoverageRelationStatistics Valid=371, Invalid=5119, Unknown=60, NotChecked=0, Total=5550 [2022-01-31 10:46:06,810 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:46:06,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 213 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1007 Invalid, 0 Unknown, 156 Unchecked, 0.4s Time] [2022-01-31 10:46:06,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 10:46:06,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2022-01-31 10:46:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 66 states have internal predecessors, (71), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 10:46:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2022-01-31 10:46:06,812 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 54 [2022-01-31 10:46:06,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:46:06,813 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2022-01-31 10:46:06,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:46:06,813 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2022-01-31 10:46:06,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 10:46:06,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:46:06,814 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:46:06,831 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 10:46:07,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 10:46:07,015 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:46:07,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:46:07,015 INFO L85 PathProgramCache]: Analyzing trace with hash -358682805, now seen corresponding path program 7 times [2022-01-31 10:46:07,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:46:07,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687088995] [2022-01-31 10:46:07,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:46:07,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:46:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:07,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:46:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:07,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 10:46:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:07,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 10:46:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:46:07,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:46:07,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687088995] [2022-01-31 10:46:07,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687088995] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:46:07,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344050738] [2022-01-31 10:46:07,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:46:07,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:46:07,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:46:07,508 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 10:46:07,520 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 10:46:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:07,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 10:46:07,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:46:07,701 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 10:46:07,739 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:46:07,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-31 10:46:07,775 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:46:07,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-31 10:46:20,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-01-31 10:46:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 136 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:46:20,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:46:24,248 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_152 Int)) (or (forall ((v_ArrVal_398 Int)) (<= (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_152) |c_main_~#a~0.offset|) v_ArrVal_398) (+ |c_main_~#a~0.offset| 24)) 0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_152)))) is different from false [2022-01-31 10:46:37,520 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_153 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_153)) (forall ((v_ArrVal_398 Int) (v_ArrVal_395 Int) (v_main_~i~0_152 Int)) (or (<= (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_153) |c_main_~#a~0.offset|) v_ArrVal_395) (+ (* 4 v_main_~i~0_152) |c_main_~#a~0.offset|) v_ArrVal_398) (+ |c_main_~#a~0.offset| 24)) 0) (not (<= (+ v_main_~i~0_153 1) v_main_~i~0_152)))))) is different from false [2022-01-31 10:46:37,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 28 [2022-01-31 10:46:37,532 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 386 treesize of output 378 [2022-01-31 10:46:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 4 proven. 119 refuted. 0 times theorem prover too weak. 4 trivial. 15 not checked. [2022-01-31 10:46:38,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344050738] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:46:38,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:46:38,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 54 [2022-01-31 10:46:38,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387801759] [2022-01-31 10:46:38,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:46:38,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 10:46:38,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:46:38,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 10:46:38,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2441, Unknown=34, NotChecked=202, Total=2862 [2022-01-31 10:46:38,056 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 54 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:46:40,405 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~N~0 |c_old(~N~0)|) (<= (+ 15 c_main_~j~0) 0) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= c_main_~i~0 6) (forall ((v_main_~i~0_153 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_153)) (forall ((v_ArrVal_398 Int) (v_ArrVal_395 Int) (v_main_~i~0_152 Int)) (or (<= (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_153) |c_main_~#a~0.offset|) v_ArrVal_395) (+ (* 4 v_main_~i~0_152) |c_main_~#a~0.offset|) v_ArrVal_398) (+ |c_main_~#a~0.offset| 24)) 0) (not (<= (+ v_main_~i~0_153 1) v_main_~i~0_152)))))) (<= 6 c_main_~i~0) (<= (+ (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* c_main_~i~0 4) |c_main_~#a~0.offset|)) 15) 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-01-31 10:46:42,460 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 7 c_main_~i~0) (<= (+ (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ |c_main_~#a~0.offset| 24)) 15) 0) (forall ((v_main_~i~0_152 Int)) (or (forall ((v_ArrVal_398 Int)) (<= (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_152) |c_main_~#a~0.offset|) v_ArrVal_398) (+ |c_main_~#a~0.offset| 24)) 0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_152)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-01-31 10:46:44,501 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ |c_main_~#a~0.offset| 24)) 15) 0) (<= 8 c_main_~i~0) (forall ((v_main_~i~0_152 Int)) (or (forall ((v_ArrVal_398 Int)) (<= (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_152) |c_main_~#a~0.offset|) v_ArrVal_398) (+ |c_main_~#a~0.offset| 24)) 0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_152)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-01-31 10:46:44,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:46:44,896 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2022-01-31 10:46:44,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 10:46:44,896 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 57 [2022-01-31 10:46:44,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:46:44,897 INFO L225 Difference]: With dead ends: 97 [2022-01-31 10:46:44,897 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 10:46:44,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 79 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=398, Invalid=5285, Unknown=37, NotChecked=760, Total=6480 [2022-01-31 10:46:44,899 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:46:44,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 214 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1126 Invalid, 0 Unknown, 271 Unchecked, 0.4s Time] [2022-01-31 10:46:44,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 10:46:44,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2022-01-31 10:46:44,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 74 states have internal predecessors, (78), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:46:44,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2022-01-31 10:46:44,901 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 57 [2022-01-31 10:46:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:46:44,901 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2022-01-31 10:46:44,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:46:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2022-01-31 10:46:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 10:46:44,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:46:44,903 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:46:44,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-31 10:46:45,104 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,SelfDestructingSolverStorable15 [2022-01-31 10:46:45,104 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:46:45,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:46:45,104 INFO L85 PathProgramCache]: Analyzing trace with hash -874026073, now seen corresponding path program 8 times [2022-01-31 10:46:45,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:46:45,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004169861] [2022-01-31 10:46:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:46:45,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:46:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:45,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:46:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:45,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 10:46:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:45,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 10:46:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:45,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 10:46:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 18 proven. 106 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:46:45,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:46:45,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004169861] [2022-01-31 10:46:45,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004169861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:46:45,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577719866] [2022-01-31 10:46:45,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:46:45,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:46:45,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:46:45,499 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 10:46:45,499 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 10:46:45,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:46:45,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:46:45,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-31 10:46:45,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:46:45,846 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 10:46:46,451 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-31 10:46:46,451 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 25 treesize of output 12 [2022-01-31 10:46:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 15 proven. 109 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:46:46,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:46:46,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577719866] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:46:46,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:46:46,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2022-01-31 10:46:46,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021997089] [2022-01-31 10:46:46,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:46:46,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 10:46:46,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:46:46,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 10:46:46,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2255, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 10:46:46,594 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 47 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 44 states have internal predecessors, (88), 8 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:46:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:46:47,006 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2022-01-31 10:46:47,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 10:46:47,007 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 44 states have internal predecessors, (88), 8 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 62 [2022-01-31 10:46:47,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:46:47,011 INFO L225 Difference]: With dead ends: 107 [2022-01-31 10:46:47,011 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 10:46:47,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=340, Invalid=4490, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 10:46:47,012 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:46:47,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 391 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 962 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-01-31 10:46:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 10:46:47,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-01-31 10:46:47,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.078125) internal successors, (69), 65 states have internal predecessors, (69), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 10:46:47,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-01-31 10:46:47,031 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 62 [2022-01-31 10:46:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:46:47,031 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-01-31 10:46:47,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 44 states have internal predecessors, (88), 8 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:46:47,031 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-01-31 10:46:47,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 10:46:47,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:46:47,033 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:46:47,049 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 10:46:47,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:46:47,233 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:46:47,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:46:47,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1858373440, now seen corresponding path program 9 times [2022-01-31 10:46:47,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:46:47,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167789882] [2022-01-31 10:46:47,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:46:47,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:46:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:47,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:46:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:47,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 10:46:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:47,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 10:46:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:47,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 10:46:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:46:47,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:46:47,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167789882] [2022-01-31 10:46:47,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167789882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:46:47,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346305853] [2022-01-31 10:46:47,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:46:47,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:46:47,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:46:47,578 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 10:46:47,579 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 10:46:47,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-31 10:46:47,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:46:47,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-31 10:46:47,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:46:47,777 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 10:46:47,815 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 10:46:47,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 10:47:10,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-01-31 10:47:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:47:10,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:47:15,061 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_178 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_178)) (forall ((v_ArrVal_479 Int)) (<= (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_178) |c_main_~#a~0.offset|) v_ArrVal_479) (+ 28 |c_main_~#a~0.offset|)) 0)))) is different from false [2022-01-31 10:47:15,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 21 [2022-01-31 10:47:15,071 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 186 treesize of output 178 [2022-01-31 10:47:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 12 trivial. 8 not checked. [2022-01-31 10:47:15,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346305853] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:47:15,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:47:15,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 26] total 58 [2022-01-31 10:47:15,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400203518] [2022-01-31 10:47:15,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:47:15,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 10:47:15,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:47:15,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 10:47:15,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2995, Unknown=6, NotChecked=110, Total=3306 [2022-01-31 10:47:15,635 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 58 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 states have internal predecessors, (113), 12 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:47:18,183 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 7 c_main_~i~0) (<= c_main_~i~0 7) (forall ((v_main_~i~0_178 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_178)) (forall ((v_ArrVal_479 Int)) (<= (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_178) |c_main_~#a~0.offset|) v_ArrVal_479) (+ 28 |c_main_~#a~0.offset|)) 0)))) (<= (+ 21 c_main_~j~0) 0) (<= (+ (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* c_main_~i~0 4) |c_main_~#a~0.offset|)) 21) 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-01-31 10:47:18,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:47:18,801 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2022-01-31 10:47:18,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 10:47:18,801 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 states have internal predecessors, (113), 12 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 65 [2022-01-31 10:47:18,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:47:18,802 INFO L225 Difference]: With dead ends: 113 [2022-01-31 10:47:18,802 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 10:47:18,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 97 SyntacticMatches, 11 SemanticMatches, 83 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=408, Invalid=6399, Unknown=7, NotChecked=326, Total=7140 [2022-01-31 10:47:18,803 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 74 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 10:47:18,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 266 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1620 Invalid, 0 Unknown, 185 Unchecked, 0.6s Time] [2022-01-31 10:47:18,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 10:47:18,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 85. [2022-01-31 10:47:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 72 states have internal predecessors, (76), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 10:47:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-01-31 10:47:18,805 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 65 [2022-01-31 10:47:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:47:18,805 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-01-31 10:47:18,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 states have internal predecessors, (113), 12 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:47:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-01-31 10:47:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 10:47:18,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:47:18,806 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:47:18,830 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 10:47:19,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 10:47:19,015 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:47:19,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:47:19,016 INFO L85 PathProgramCache]: Analyzing trace with hash 257104135, now seen corresponding path program 10 times [2022-01-31 10:47:19,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:47:19,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454748485] [2022-01-31 10:47:19,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:47:19,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:47:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:47:19,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:47:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:47:19,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 10:47:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:47:19,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 10:47:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:47:19,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 10:47:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:47:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 6 proven. 173 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:47:19,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:47:19,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454748485] [2022-01-31 10:47:19,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454748485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:47:19,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782488824] [2022-01-31 10:47:19,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:47:19,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:47:19,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:47:19,454 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 10:47:19,455 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 10:47:19,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:47:19,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:47:19,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-31 10:47:19,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:47:19,655 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 10:47:19,687 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:47:19,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-31 10:47:19,719 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:47:19,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-31 10:47:41,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-01-31 10:47:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 2 proven. 177 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:47:41,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:47:45,639 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_197 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_197)) (forall ((v_ArrVal_530 Int)) (<= (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_197) |c_main_~#a~0.offset|) v_ArrVal_530) (+ 28 |c_main_~#a~0.offset|)) 0)))) is different from false [2022-01-31 10:47:57,311 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_198 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_198)) (forall ((v_ArrVal_530 Int) (v_main_~i~0_197 Int) (v_ArrVal_527 Int)) (or (not (<= (+ v_main_~i~0_198 1) v_main_~i~0_197)) (<= (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_198) |c_main_~#a~0.offset|) v_ArrVal_527) (+ (* 4 v_main_~i~0_197) |c_main_~#a~0.offset|) v_ArrVal_530) (+ 28 |c_main_~#a~0.offset|)) 0))))) is different from false [2022-01-31 10:47:57,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 28 [2022-01-31 10:47:57,323 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 386 treesize of output 378 [2022-01-31 10:47:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 12 trivial. 17 not checked. [2022-01-31 10:47:57,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782488824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:47:57,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:47:57,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 61 [2022-01-31 10:47:57,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712266289] [2022-01-31 10:47:57,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:47:57,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 10:47:57,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:47:57,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 10:47:57,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=3197, Unknown=22, NotChecked=230, Total=3660 [2022-01-31 10:47:57,958 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 61 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 12 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:48:00,493 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 7 c_main_~i~0) (<= c_main_~i~0 7) (forall ((v_main_~i~0_198 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_198)) (forall ((v_ArrVal_530 Int) (v_main_~i~0_197 Int) (v_ArrVal_527 Int)) (or (not (<= (+ v_main_~i~0_198 1) v_main_~i~0_197)) (<= (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_198) |c_main_~#a~0.offset|) v_ArrVal_527) (+ (* 4 v_main_~i~0_197) |c_main_~#a~0.offset|) v_ArrVal_530) (+ 28 |c_main_~#a~0.offset|)) 0))))) (<= (+ 21 c_main_~j~0) 0) (<= (+ (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* c_main_~i~0 4) |c_main_~#a~0.offset|)) 21) 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-01-31 10:48:02,534 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (forall ((v_main_~i~0_197 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_197)) (forall ((v_ArrVal_530 Int)) (<= (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_197) |c_main_~#a~0.offset|) v_ArrVal_530) (+ 28 |c_main_~#a~0.offset|)) 0)))) (<= 8 c_main_~i~0) (<= (+ 21 (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ 28 |c_main_~#a~0.offset|))) 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-01-31 10:48:02,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:48:02,984 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2022-01-31 10:48:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 10:48:02,984 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 12 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 68 [2022-01-31 10:48:02,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:48:02,987 INFO L225 Difference]: With dead ends: 109 [2022-01-31 10:48:02,987 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 10:48:02,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 107 SyntacticMatches, 11 SemanticMatches, 87 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 42.7s TimeCoverageRelationStatistics Valid=444, Invalid=6688, Unknown=24, NotChecked=676, Total=7832 [2022-01-31 10:48:02,989 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 111 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:48:02,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 225 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1245 Invalid, 0 Unknown, 240 Unchecked, 0.4s Time] [2022-01-31 10:48:02,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 10:48:03,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2022-01-31 10:48:03,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 83 states have internal predecessors, (86), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:48:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 105 transitions. [2022-01-31 10:48:03,002 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 105 transitions. Word has length 68 [2022-01-31 10:48:03,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:48:03,003 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 105 transitions. [2022-01-31 10:48:03,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 12 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:48:03,003 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 105 transitions. [2022-01-31 10:48:03,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 10:48:03,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:48:03,003 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:48:03,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-31 10:48:03,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:48:03,219 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:48:03,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:48:03,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1088510517, now seen corresponding path program 11 times [2022-01-31 10:48:03,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:48:03,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259163569] [2022-01-31 10:48:03,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:48:03,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:48:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:03,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:48:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:03,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 10:48:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:03,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 10:48:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:03,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 10:48:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:03,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 10:48:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 32 proven. 134 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:48:03,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:48:03,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259163569] [2022-01-31 10:48:03,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259163569] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:48:03,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816003165] [2022-01-31 10:48:03,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:48:03,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:48:03,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:48:03,772 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 10:48:03,799 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 10:48:03,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-31 10:48:03,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:48:03,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-31 10:48:03,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:48:04,345 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 10:48:12,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-01-31 10:48:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:48:12,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:48:15,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-01-31 10:48:15,267 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 32 treesize of output 28 [2022-01-31 10:48:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 158 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:48:15,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816003165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:48:15,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:48:15,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 27] total 77 [2022-01-31 10:48:15,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411583747] [2022-01-31 10:48:15,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:48:15,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 10:48:15,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:48:15,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 10:48:15,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=5548, Unknown=2, NotChecked=0, Total=5852 [2022-01-31 10:48:15,970 INFO L87 Difference]: Start difference. First operand 99 states and 105 transitions. Second operand has 77 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 15 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 10:48:17,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:48:17,389 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2022-01-31 10:48:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 10:48:17,389 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 15 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 73 [2022-01-31 10:48:17,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:48:17,390 INFO L225 Difference]: With dead ends: 129 [2022-01-31 10:48:17,390 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 10:48:17,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 113 SyntacticMatches, 15 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3275 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=675, Invalid=11755, Unknown=2, NotChecked=0, Total=12432 [2022-01-31 10:48:17,391 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 92 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 619 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:48:17,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 410 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1796 Invalid, 0 Unknown, 619 Unchecked, 0.5s Time] [2022-01-31 10:48:17,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 10:48:17,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-01-31 10:48:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 10:48:17,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-01-31 10:48:17,393 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 73 [2022-01-31 10:48:17,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:48:17,394 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-01-31 10:48:17,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 74 states have internal predecessors, (146), 15 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 10:48:17,394 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-01-31 10:48:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 10:48:17,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:48:17,394 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:48:17,413 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 10:48:17,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:48:17,595 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:48:17,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:48:17,595 INFO L85 PathProgramCache]: Analyzing trace with hash 2004956412, now seen corresponding path program 12 times [2022-01-31 10:48:17,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:48:17,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513331546] [2022-01-31 10:48:17,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:48:17,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:48:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:18,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:48:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:18,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 10:48:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:18,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 10:48:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:18,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 10:48:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:18,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 10:48:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 8 proven. 187 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:48:18,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:48:18,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513331546] [2022-01-31 10:48:18,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513331546] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:48:18,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028967821] [2022-01-31 10:48:18,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:48:18,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:48:18,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:48:18,032 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 10:48:18,036 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 10:48:18,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-31 10:48:18,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:48:18,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 60 conjunts are in the unsatisfiable core [2022-01-31 10:48:18,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:48:18,300 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 10:48:18,369 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:48:18,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-01-31 10:48:18,439 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:48:18,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-01-31 10:48:18,511 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:48:18,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-01-31 10:48:18,585 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:48:18,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-01-31 10:48:18,669 INFO L353 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2022-01-31 10:48:18,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-31 10:48:29,662 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 10:48:29,662 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 36 treesize of output 12 [2022-01-31 10:48:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 3 proven. 204 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:48:29,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:49:53,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 113 treesize of output 109 [2022-01-31 10:49:53,411 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 10:49:53,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 28249429 treesize of output 28183885 [2022-01-31 10:50:43,724 WARN L228 SmtUtils]: Spent 50.31s on a formula simplification that was a NOOP. DAG size: 1283 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)