/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/verifythis/duplets.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 21:42:19,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 21:42:19,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 21:42:19,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 21:42:19,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 21:42:19,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 21:42:19,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 21:42:19,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 21:42:19,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 21:42:19,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 21:42:19,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 21:42:19,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 21:42:19,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 21:42:19,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 21:42:19,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 21:42:19,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 21:42:19,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 21:42:19,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 21:42:19,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 21:42:19,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 21:42:19,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 21:42:19,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 21:42:19,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 21:42:19,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 21:42:19,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 21:42:19,827 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-14 21:42:19,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-14 21:42:19,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-14 21:42:19,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-14 21:42:19,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-14 21:42:19,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-14 21:42:19,829 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-14 21:42:19,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-14 21:42:19,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 21:42:19,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 21:42:19,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 21:42:19,835 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 21:42:19,849 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 21:42:19,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 21:42:19,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 21:42:19,851 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 21:42:19,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 21:42:19,851 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 21:42:19,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 21:42:19,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 21:42:19,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 21:42:19,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 21:42:19,851 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 21:42:19,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 21:42:19,851 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 21:42:19,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 21:42:19,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 21:42:19,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 21:42:19,852 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 21:42:19,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 21:42:19,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:42:19,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 21:42:19,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 21:42:19,853 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 21:42:19,853 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 21:42:20,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 21:42:20,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 21:42:20,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 21:42:20,058 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 21:42:20,058 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 21:42:20,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/duplets.c [2022-02-14 21:42:20,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7202c483f/87b79ad507b9443ab8102fae297f0e15/FLAGf4c3d0634 [2022-02-14 21:42:20,464 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 21:42:20,464 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c [2022-02-14 21:42:20,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7202c483f/87b79ad507b9443ab8102fae297f0e15/FLAGf4c3d0634 [2022-02-14 21:42:20,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7202c483f/87b79ad507b9443ab8102fae297f0e15 [2022-02-14 21:42:20,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 21:42:20,493 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 21:42:20,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 21:42:20,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 21:42:20,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 21:42:20,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:42:20" (1/1) ... [2022-02-14 21:42:20,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@210e17ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:20, skipping insertion in model container [2022-02-14 21:42:20,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:42:20" (1/1) ... [2022-02-14 21:42:20,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 21:42:20,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 21:42:20,620 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c[485,498] [2022-02-14 21:42:20,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:42:20,642 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 21:42:20,649 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c[485,498] [2022-02-14 21:42:20,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:42:20,666 INFO L208 MainTranslator]: Completed translation [2022-02-14 21:42:20,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:20 WrapperNode [2022-02-14 21:42:20,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 21:42:20,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 21:42:20,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 21:42:20,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 21:42:20,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:20" (1/1) ... [2022-02-14 21:42:20,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:20" (1/1) ... [2022-02-14 21:42:20,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:20" (1/1) ... [2022-02-14 21:42:20,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:20" (1/1) ... [2022-02-14 21:42:20,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:20" (1/1) ... [2022-02-14 21:42:20,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:20" (1/1) ... [2022-02-14 21:42:20,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:20" (1/1) ... [2022-02-14 21:42:20,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 21:42:20,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 21:42:20,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 21:42:20,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 21:42:20,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:20" (1/1) ... [2022-02-14 21:42:20,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:42:20,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:42:20,712 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) [2022-02-14 21:42:20,732 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 [2022-02-14 21:42:20,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 21:42:20,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 21:42:20,746 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 21:42:20,746 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 21:42:20,746 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 21:42:20,746 INFO L138 BoogieDeclarations]: Found implementation of procedure mkdup [2022-02-14 21:42:20,746 INFO L138 BoogieDeclarations]: Found implementation of procedure finddup [2022-02-14 21:42:20,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 21:42:20,747 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-02-14 21:42:20,747 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-02-14 21:42:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-02-14 21:42:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 21:42:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 21:42:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 21:42:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 21:42:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 21:42:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 21:42:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 21:42:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure mkdup [2022-02-14 21:42:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 21:42:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure finddup [2022-02-14 21:42:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 21:42:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 21:42:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-02-14 21:42:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-14 21:42:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-02-14 21:42:20,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 21:42:20,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 21:42:20,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 21:42:20,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 21:42:20,813 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 21:42:20,814 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 21:42:20,967 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 21:42:20,972 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 21:42:20,972 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 21:42:20,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:42:20 BoogieIcfgContainer [2022-02-14 21:42:20,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 21:42:20,974 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 21:42:20,974 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 21:42:20,974 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 21:42:20,976 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:42:20" (1/1) ... [2022-02-14 21:42:20,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:42:20 BasicIcfg [2022-02-14 21:42:20,998 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 21:42:20,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 21:42:20,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 21:42:21,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 21:42:21,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:42:20" (1/4) ... [2022-02-14 21:42:21,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0a2903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:42:21, skipping insertion in model container [2022-02-14 21:42:21,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:20" (2/4) ... [2022-02-14 21:42:21,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0a2903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:42:21, skipping insertion in model container [2022-02-14 21:42:21,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:42:20" (3/4) ... [2022-02-14 21:42:21,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0a2903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 09:42:21, skipping insertion in model container [2022-02-14 21:42:21,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:42:20" (4/4) ... [2022-02-14 21:42:21,003 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.cJordan [2022-02-14 21:42:21,006 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 21:42:21,006 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 21:42:21,032 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 21:42:21,036 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 [2022-02-14 21:42:21,036 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 21:42:21,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 21:42:21,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-14 21:42:21,049 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:21,050 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:21,050 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:21,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:21,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1613559281, now seen corresponding path program 1 times [2022-02-14 21:42:21,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:21,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000187458] [2022-02-14 21:42:21,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:21,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:42:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:42:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:42:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:42:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 21:42:21,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:21,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000187458] [2022-02-14 21:42:21,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000187458] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:42:21,325 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:42:21,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 21:42:21,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615262163] [2022-02-14 21:42:21,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:42:21,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 21:42:21,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:21,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 21:42:21,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 21:42:21,357 INFO L87 Difference]: Start difference. First operand has 59 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-14 21:42:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:21,494 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-02-14 21:42:21,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 21:42:21,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2022-02-14 21:42:21,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:21,507 INFO L225 Difference]: With dead ends: 61 [2022-02-14 21:42:21,507 INFO L226 Difference]: Without dead ends: 56 [2022-02-14 21:42:21,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 21:42:21,511 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 59 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:21,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 55 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:42:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-14 21:42:21,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-02-14 21:42:21,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 21:42:21,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-02-14 21:42:21,549 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 49 [2022-02-14 21:42:21,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:21,549 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-02-14 21:42:21,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-14 21:42:21,549 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-02-14 21:42:21,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-14 21:42:21,551 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:21,551 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:21,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 21:42:21,551 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:21,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:21,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1068751152, now seen corresponding path program 1 times [2022-02-14 21:42:21,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:21,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71406671] [2022-02-14 21:42:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:21,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:42:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:42:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:42:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:42:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 21:42:21,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:21,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71406671] [2022-02-14 21:42:21,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71406671] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:42:21,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247170171] [2022-02-14 21:42:21,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:21,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:42:21,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:42:21,733 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) [2022-02-14 21:42:21,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 21:42:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:21,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-14 21:42:21,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:42:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 21:42:21,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:42:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 21:42:22,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247170171] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:42:22,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:42:22,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 17 [2022-02-14 21:42:22,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701160086] [2022-02-14 21:42:22,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:42:22,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-14 21:42:22,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:22,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-14 21:42:22,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-02-14 21:42:22,267 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 17 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-02-14 21:42:22,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:22,620 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-02-14 21:42:22,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-14 21:42:22,621 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 49 [2022-02-14 21:42:22,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:22,623 INFO L225 Difference]: With dead ends: 66 [2022-02-14 21:42:22,623 INFO L226 Difference]: Without dead ends: 63 [2022-02-14 21:42:22,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-02-14 21:42:22,625 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:22,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 52 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 21:42:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-14 21:42:22,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-02-14 21:42:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 21:42:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2022-02-14 21:42:22,640 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 49 [2022-02-14 21:42:22,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:22,641 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2022-02-14 21:42:22,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-02-14 21:42:22,641 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2022-02-14 21:42:22,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-14 21:42:22,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:22,642 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:22,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-14 21:42:22,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:42:22,854 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:22,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:22,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1304641222, now seen corresponding path program 1 times [2022-02-14 21:42:22,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:22,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272917651] [2022-02-14 21:42:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:22,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:22,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:22,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:22,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:22,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:42:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:22,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:42:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:22,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:22,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:42:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:22,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:42:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 21:42:22,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:22,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272917651] [2022-02-14 21:42:22,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272917651] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:42:22,957 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:42:22,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-14 21:42:22,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276342029] [2022-02-14 21:42:22,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:42:22,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 21:42:22,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:22,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 21:42:22,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-14 21:42:22,958 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-14 21:42:23,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:23,199 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2022-02-14 21:42:23,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 21:42:23,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 50 [2022-02-14 21:42:23,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:23,201 INFO L225 Difference]: With dead ends: 73 [2022-02-14 21:42:23,201 INFO L226 Difference]: Without dead ends: 73 [2022-02-14 21:42:23,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-02-14 21:42:23,202 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:23,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 57 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 21:42:23,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-14 21:42:23,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2022-02-14 21:42:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-02-14 21:42:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-02-14 21:42:23,207 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 50 [2022-02-14 21:42:23,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:23,207 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-02-14 21:42:23,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-14 21:42:23,208 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-02-14 21:42:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-14 21:42:23,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:23,211 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:23,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-14 21:42:23,212 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:23,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:23,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1610834198, now seen corresponding path program 1 times [2022-02-14 21:42:23,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:23,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809242235] [2022-02-14 21:42:23,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:23,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:23,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:23,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:23,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:23,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:42:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:23,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:42:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:23,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:23,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:42:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:23,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:42:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 21:42:23,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:23,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809242235] [2022-02-14 21:42:23,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809242235] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:42:23,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843620951] [2022-02-14 21:42:23,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:23,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:42:23,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:42:23,568 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) [2022-02-14 21:42:23,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 21:42:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:23,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-14 21:42:23,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:42:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 21:42:23,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:42:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 21:42:24,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843620951] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 21:42:24,262 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:42:24,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15, 12] total 25 [2022-02-14 21:42:24,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262920580] [2022-02-14 21:42:24,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:42:24,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 21:42:24,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:24,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 21:42:24,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-14 21:42:24,263 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-02-14 21:42:24,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:24,366 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2022-02-14 21:42:24,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 21:42:24,367 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 52 [2022-02-14 21:42:24,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:24,368 INFO L225 Difference]: With dead ends: 80 [2022-02-14 21:42:24,368 INFO L226 Difference]: Without dead ends: 70 [2022-02-14 21:42:24,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-02-14 21:42:24,369 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 42 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:24,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 412 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:42:24,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-14 21:42:24,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-02-14 21:42:24,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-02-14 21:42:24,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-02-14 21:42:24,373 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 52 [2022-02-14 21:42:24,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:24,373 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-02-14 21:42:24,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-02-14 21:42:24,373 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-02-14 21:42:24,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-14 21:42:24,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:24,374 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:24,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-14 21:42:24,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-14 21:42:24,583 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:24,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:24,584 INFO L85 PathProgramCache]: Analyzing trace with hash -58927682, now seen corresponding path program 1 times [2022-02-14 21:42:24,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:24,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463731027] [2022-02-14 21:42:24,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:24,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:24,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:24,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:24,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:24,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:42:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:24,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:42:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:24,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:24,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:42:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:24,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:42:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 21:42:24,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:24,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463731027] [2022-02-14 21:42:24,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463731027] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:42:24,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017254360] [2022-02-14 21:42:24,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:24,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:42:24,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:42:24,652 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) [2022-02-14 21:42:24,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 21:42:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:24,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-14 21:42:24,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:42:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 21:42:24,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:42:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 21:42:24,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017254360] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:42:24,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:42:24,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 7 [2022-02-14 21:42:24,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829507628] [2022-02-14 21:42:24,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:42:24,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 21:42:24,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:24,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 21:42:24,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-14 21:42:24,861 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-14 21:42:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:25,006 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2022-02-14 21:42:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 21:42:25,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 55 [2022-02-14 21:42:25,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:25,007 INFO L225 Difference]: With dead ends: 67 [2022-02-14 21:42:25,007 INFO L226 Difference]: Without dead ends: 67 [2022-02-14 21:42:25,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-02-14 21:42:25,008 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 66 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:25,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 51 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:42:25,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-14 21:42:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-02-14 21:42:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 45 states have internal predecessors, (50), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-02-14 21:42:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-02-14 21:42:25,012 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 55 [2022-02-14 21:42:25,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:25,012 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-02-14 21:42:25,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-14 21:42:25,012 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-02-14 21:42:25,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-14 21:42:25,012 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:25,013 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:25,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 21:42:25,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:42:25,228 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:25,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:25,228 INFO L85 PathProgramCache]: Analyzing trace with hash 925124550, now seen corresponding path program 1 times [2022-02-14 21:42:25,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:25,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244240781] [2022-02-14 21:42:25,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:25,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:42:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:42:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:42:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:42:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 21:42:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 21:42:25,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:25,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244240781] [2022-02-14 21:42:25,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244240781] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:42:25,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220146718] [2022-02-14 21:42:25,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:25,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:42:25,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:42:25,488 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) [2022-02-14 21:42:25,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 21:42:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-14 21:42:25,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:42:25,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-02-14 21:42:25,712 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-02-14 21:42:25,720 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-02-14 21:42:25,720 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 16 treesize of output 22 [2022-02-14 21:42:25,725 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 7 treesize of output 5 [2022-02-14 21:42:25,800 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 17 treesize of output 9 [2022-02-14 21:42:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 21:42:25,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 21:42:25,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220146718] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:42:25,839 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 21:42:25,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 25 [2022-02-14 21:42:25,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492695268] [2022-02-14 21:42:25,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:42:25,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 21:42:25,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:25,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 21:42:25,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2022-02-14 21:42:25,840 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-14 21:42:26,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:26,021 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2022-02-14 21:42:26,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 21:42:26,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2022-02-14 21:42:26,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:26,022 INFO L225 Difference]: With dead ends: 83 [2022-02-14 21:42:26,022 INFO L226 Difference]: Without dead ends: 83 [2022-02-14 21:42:26,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-02-14 21:42:26,023 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 50 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:26,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 441 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:42:26,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-14 21:42:26,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2022-02-14 21:42:26,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 50 states have internal predecessors, (56), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-02-14 21:42:26,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2022-02-14 21:42:26,027 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 57 [2022-02-14 21:42:26,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:26,027 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2022-02-14 21:42:26,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-14 21:42:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2022-02-14 21:42:26,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-14 21:42:26,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:26,028 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:26,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 21:42:26,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:42:26,244 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:26,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:26,245 INFO L85 PathProgramCache]: Analyzing trace with hash 926048071, now seen corresponding path program 1 times [2022-02-14 21:42:26,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:26,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957777796] [2022-02-14 21:42:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:26,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:26,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:26,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:26,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:26,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:42:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:26,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:42:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:26,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:26,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:42:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:26,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:42:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:26,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 21:42:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 21:42:26,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:26,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957777796] [2022-02-14 21:42:26,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957777796] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:42:26,373 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:42:26,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-14 21:42:26,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313249746] [2022-02-14 21:42:26,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:42:26,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-14 21:42:26,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:26,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-14 21:42:26,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-02-14 21:42:26,375 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-14 21:42:26,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:26,726 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2022-02-14 21:42:26,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 21:42:26,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2022-02-14 21:42:26,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:26,727 INFO L225 Difference]: With dead ends: 92 [2022-02-14 21:42:26,727 INFO L226 Difference]: Without dead ends: 92 [2022-02-14 21:42:26,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-02-14 21:42:26,728 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 111 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:26,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 56 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 21:42:26,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-14 21:42:26,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2022-02-14 21:42:26,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 57 states have internal predecessors, (65), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) [2022-02-14 21:42:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2022-02-14 21:42:26,733 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 57 [2022-02-14 21:42:26,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:26,733 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2022-02-14 21:42:26,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-14 21:42:26,733 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2022-02-14 21:42:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-14 21:42:26,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:26,734 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:26,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-14 21:42:26,734 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:26,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:26,734 INFO L85 PathProgramCache]: Analyzing trace with hash -984079512, now seen corresponding path program 2 times [2022-02-14 21:42:26,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:26,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190717021] [2022-02-14 21:42:26,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:26,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:26,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:26,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:26,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:26,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:42:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:27,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:42:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:27,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:27,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:42:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:27,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:42:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-02-14 21:42:27,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:27,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190717021] [2022-02-14 21:42:27,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190717021] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:42:27,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148071296] [2022-02-14 21:42:27,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 21:42:27,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:42:27,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:42:27,375 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) [2022-02-14 21:42:27,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 21:42:27,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 21:42:27,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:42:27,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 54 conjunts are in the unsatisfiable core [2022-02-14 21:42:27,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:42:27,673 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-02-14 21:42:27,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-02-14 21:42:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-02-14 21:42:38,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:42:38,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148071296] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:42:38,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:42:38,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 33 [2022-02-14 21:42:38,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237459151] [2022-02-14 21:42:38,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:42:38,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-14 21:42:38,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:38,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-14 21:42:38,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1025, Unknown=5, NotChecked=0, Total=1122 [2022-02-14 21:42:38,542 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 33 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 12 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-02-14 21:42:41,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:41,514 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2022-02-14 21:42:41,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-14 21:42:41,514 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 12 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) Word has length 58 [2022-02-14 21:42:41,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:41,515 INFO L225 Difference]: With dead ends: 99 [2022-02-14 21:42:41,515 INFO L226 Difference]: Without dead ends: 96 [2022-02-14 21:42:41,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=258, Invalid=2707, Unknown=5, NotChecked=0, Total=2970 [2022-02-14 21:42:41,516 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 61 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:41,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 245 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 911 Invalid, 0 Unknown, 378 Unchecked, 0.4s Time] [2022-02-14 21:42:41,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-14 21:42:41,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2022-02-14 21:42:41,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 63 states have internal predecessors, (74), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) [2022-02-14 21:42:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2022-02-14 21:42:41,529 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 58 [2022-02-14 21:42:41,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:41,529 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2022-02-14 21:42:41,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 12 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-02-14 21:42:41,530 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2022-02-14 21:42:41,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-14 21:42:41,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:41,530 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:41,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 21:42:41,735 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 [2022-02-14 21:42:41,735 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:41,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1828813328, now seen corresponding path program 3 times [2022-02-14 21:42:41,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:41,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771823419] [2022-02-14 21:42:41,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:41,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:41,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:41,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:41,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:41,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:42:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:41,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:42:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:41,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:41,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:42:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:41,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:42:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 21:42:41,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:41,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771823419] [2022-02-14 21:42:41,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771823419] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:42:41,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532464914] [2022-02-14 21:42:41,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 21:42:41,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:42:41,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:42:41,815 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) [2022-02-14 21:42:41,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 21:42:41,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-14 21:42:41,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:42:41,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-14 21:42:41,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:42:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 21:42:41,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:42:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 21:42:42,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532464914] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:42:42,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:42:42,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 10 [2022-02-14 21:42:42,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502827231] [2022-02-14 21:42:42,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:42:42,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 21:42:42,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:42,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 21:42:42,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-14 21:42:42,057 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-14 21:42:42,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:42,325 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2022-02-14 21:42:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 21:42:42,326 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 61 [2022-02-14 21:42:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:42,326 INFO L225 Difference]: With dead ends: 101 [2022-02-14 21:42:42,326 INFO L226 Difference]: Without dead ends: 101 [2022-02-14 21:42:42,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-02-14 21:42:42,327 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 71 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:42,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 57 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 21:42:42,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-14 21:42:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2022-02-14 21:42:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 69 states have internal predecessors, (82), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) [2022-02-14 21:42:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2022-02-14 21:42:42,334 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 61 [2022-02-14 21:42:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:42,335 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2022-02-14 21:42:42,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-14 21:42:42,335 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2022-02-14 21:42:42,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-14 21:42:42,335 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:42,335 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:42,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 21:42:42,547 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 [2022-02-14 21:42:42,547 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:42,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:42,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1290066965, now seen corresponding path program 1 times [2022-02-14 21:42:42,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:42,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533720469] [2022-02-14 21:42:42,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:42,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:42,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:42,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:42,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:42,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:42:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:42,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:42:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:42,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:42,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:42:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:42,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:42:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:42,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 21:42:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:42,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 21:42:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-14 21:42:42,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:42,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533720469] [2022-02-14 21:42:42,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533720469] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:42:42,684 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:42:42,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-14 21:42:42,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245990365] [2022-02-14 21:42:42,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:42:42,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 21:42:42,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:42,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 21:42:42,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-02-14 21:42:42,686 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-14 21:42:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:43,010 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2022-02-14 21:42:43,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 21:42:43,010 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 64 [2022-02-14 21:42:43,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:43,011 INFO L225 Difference]: With dead ends: 109 [2022-02-14 21:42:43,011 INFO L226 Difference]: Without dead ends: 109 [2022-02-14 21:42:43,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-14 21:42:43,012 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 82 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:43,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 56 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 21:42:43,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-14 21:42:43,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2022-02-14 21:42:43,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 75 states have internal predecessors, (88), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-02-14 21:42:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2022-02-14 21:42:43,016 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 64 [2022-02-14 21:42:43,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:43,016 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2022-02-14 21:42:43,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-14 21:42:43,016 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2022-02-14 21:42:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-14 21:42:43,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:43,017 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:43,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-14 21:42:43,017 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:43,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:43,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1289143444, now seen corresponding path program 1 times [2022-02-14 21:42:43,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:43,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955437429] [2022-02-14 21:42:43,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:43,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:42:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:42:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:42:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:42:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 21:42:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 21:42:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-14 21:42:43,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:43,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955437429] [2022-02-14 21:42:43,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955437429] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:42:43,111 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:42:43,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-14 21:42:43,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139033558] [2022-02-14 21:42:43,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:42:43,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 21:42:43,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:43,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 21:42:43,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-14 21:42:43,113 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-14 21:42:43,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:43,366 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2022-02-14 21:42:43,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 21:42:43,366 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 64 [2022-02-14 21:42:43,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:43,367 INFO L225 Difference]: With dead ends: 107 [2022-02-14 21:42:43,367 INFO L226 Difference]: Without dead ends: 107 [2022-02-14 21:42:43,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-02-14 21:42:43,367 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 77 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:43,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 50 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 21:42:43,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-14 21:42:43,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-02-14 21:42:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 75 states have internal predecessors, (87), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-02-14 21:42:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 125 transitions. [2022-02-14 21:42:43,371 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 125 transitions. Word has length 64 [2022-02-14 21:42:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:43,371 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 125 transitions. [2022-02-14 21:42:43,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-14 21:42:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 125 transitions. [2022-02-14 21:42:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-14 21:42:43,371 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:43,371 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:43,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-14 21:42:43,372 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:43,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:43,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1636548555, now seen corresponding path program 1 times [2022-02-14 21:42:43,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:43,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751776722] [2022-02-14 21:42:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:43,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:42:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:42:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:42:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:42:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-14 21:42:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,430 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 21:42:43,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:43,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751776722] [2022-02-14 21:42:43,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751776722] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:42:43,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248196293] [2022-02-14 21:42:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:43,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:42:43,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:42:43,432 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) [2022-02-14 21:42:43,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 21:42:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:43,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-14 21:42:43,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:42:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-14 21:42:43,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:42:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 21:42:43,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248196293] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:42:43,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:42:43,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 9 [2022-02-14 21:42:43,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860079907] [2022-02-14 21:42:43,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:42:43,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 21:42:43,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:43,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 21:42:43,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-14 21:42:43,671 INFO L87 Difference]: Start difference. First operand 103 states and 125 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-14 21:42:43,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:43,893 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2022-02-14 21:42:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-14 21:42:43,896 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 63 [2022-02-14 21:42:43,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:43,897 INFO L225 Difference]: With dead ends: 116 [2022-02-14 21:42:43,897 INFO L226 Difference]: Without dead ends: 112 [2022-02-14 21:42:43,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-02-14 21:42:43,897 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 89 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:43,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 54 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 21:42:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-14 21:42:43,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2022-02-14 21:42:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.173913043478261) internal successors, (81), 72 states have internal predecessors, (81), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-02-14 21:42:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2022-02-14 21:42:43,901 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 63 [2022-02-14 21:42:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:43,901 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2022-02-14 21:42:43,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-14 21:42:43,901 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2022-02-14 21:42:43,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-14 21:42:43,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:43,902 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:43,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 21:42:44,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:42:44,118 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:44,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:44,119 INFO L85 PathProgramCache]: Analyzing trace with hash 937349773, now seen corresponding path program 2 times [2022-02-14 21:42:44,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:44,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962577487] [2022-02-14 21:42:44,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:44,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:42:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:42:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:42:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:42:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 21:42:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-02-14 21:42:44,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:44,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962577487] [2022-02-14 21:42:44,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962577487] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:42:44,275 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:42:44,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-14 21:42:44,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589000355] [2022-02-14 21:42:44,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:42:44,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 21:42:44,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:44,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 21:42:44,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-02-14 21:42:44,276 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-14 21:42:44,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:44,681 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2022-02-14 21:42:44,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-14 21:42:44,682 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-02-14 21:42:44,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:44,682 INFO L225 Difference]: With dead ends: 108 [2022-02-14 21:42:44,682 INFO L226 Difference]: Without dead ends: 108 [2022-02-14 21:42:44,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-02-14 21:42:44,683 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 85 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:44,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 65 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 21:42:44,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-14 21:42:44,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 90. [2022-02-14 21:42:44,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 64 states have internal predecessors, (71), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-02-14 21:42:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2022-02-14 21:42:44,686 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 66 [2022-02-14 21:42:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:44,686 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2022-02-14 21:42:44,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-14 21:42:44,686 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2022-02-14 21:42:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-14 21:42:44,687 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:44,687 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:44,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-14 21:42:44,687 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:44,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:44,687 INFO L85 PathProgramCache]: Analyzing trace with hash -455253687, now seen corresponding path program 1 times [2022-02-14 21:42:44,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:44,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787952856] [2022-02-14 21:42:44,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:44,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:42:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:42:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:42:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:42:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 21:42:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 21:42:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-14 21:42:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-02-14 21:42:44,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:44,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787952856] [2022-02-14 21:42:44,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787952856] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:42:44,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567334621] [2022-02-14 21:42:44,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:44,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:42:44,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:42:44,894 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) [2022-02-14 21:42:44,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 21:42:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:44,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-14 21:42:44,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:42:45,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-02-14 21:42:45,097 INFO L353 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-02-14 21:42:45,097 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-02-14 21:42:45,132 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-02-14 21:42:45,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 72 [2022-02-14 21:42:45,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-02-14 21:42:45,150 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 8 treesize of output 6 [2022-02-14 21:42:45,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 21:42:45,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-02-14 21:42:45,186 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 5 treesize of output 3 [2022-02-14 21:42:45,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-02-14 21:42:45,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 36 treesize of output 32 [2022-02-14 21:42:45,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-02-14 21:42:45,544 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-02-14 21:42:45,545 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 29 treesize of output 17 [2022-02-14 21:42:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-14 21:42:45,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:42:45,700 INFO L353 Elim1Store]: treesize reduction 28, result has 33.3 percent of original size [2022-02-14 21:42:45,700 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 52 [2022-02-14 21:42:45,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-14 21:42:45,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 38 treesize of output 42 [2022-02-14 21:42:45,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-14 21:42:45,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 47 [2022-02-14 21:42:45,712 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 67 treesize of output 55 [2022-02-14 21:42:45,716 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-02-14 21:42:45,716 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 13 treesize of output 9 [2022-02-14 21:42:45,719 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 6 treesize of output 4 [2022-02-14 21:42:45,763 INFO L353 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2022-02-14 21:42:45,763 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 94 treesize of output 87 [2022-02-14 21:42:45,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-14 21:42:45,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 215 [2022-02-14 21:42:45,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-14 21:42:45,803 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 219 treesize of output 216 [2022-02-14 21:42:45,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-14 21:42:45,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 23 treesize of output 23 [2022-02-14 21:42:45,837 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 6 treesize of output 4 [2022-02-14 21:42:45,875 INFO L353 Elim1Store]: treesize reduction 5, result has 16.7 percent of original size [2022-02-14 21:42:45,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 19 treesize of output 1 [2022-02-14 21:42:45,902 INFO L353 Elim1Store]: treesize reduction 5, result has 16.7 percent of original size [2022-02-14 21:42:45,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 26 treesize of output 1 [2022-02-14 21:42:46,116 INFO L353 Elim1Store]: treesize reduction 20, result has 64.9 percent of original size [2022-02-14 21:42:46,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 144 treesize of output 166 [2022-02-14 21:42:46,306 INFO L353 Elim1Store]: treesize reduction 20, result has 64.9 percent of original size [2022-02-14 21:42:46,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 137 treesize of output 162 [2022-02-14 21:42:46,451 INFO L353 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2022-02-14 21:42:46,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 144 treesize of output 1 [2022-02-14 21:42:46,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-14 21:42:46,588 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 76 treesize of output 78 [2022-02-14 21:42:46,657 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 6 treesize of output 4 [2022-02-14 21:42:46,678 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 8 treesize of output 6 [2022-02-14 21:42:46,783 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 24 treesize of output 22 [2022-02-14 21:42:46,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-14 21:42:46,789 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 33 treesize of output 35 [2022-02-14 21:42:46,830 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 6 treesize of output 4 [2022-02-14 21:42:46,836 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 6 treesize of output 4 [2022-02-14 21:42:46,843 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 6 treesize of output 4 [2022-02-14 21:42:46,848 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 6 treesize of output 4 [2022-02-14 21:42:46,853 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 6 treesize of output 4 [2022-02-14 21:42:46,862 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 6 treesize of output 4 [2022-02-14 21:42:46,871 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 20 treesize of output 18 [2022-02-14 21:42:46,883 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-02-14 21:42:46,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 21:42:46,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 21:42:46,891 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-14 21:42:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-14 21:42:47,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567334621] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 21:42:47,093 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:42:47,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16, 11] total 27 [2022-02-14 21:42:47,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827768636] [2022-02-14 21:42:47,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:42:47,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 21:42:47,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:47,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 21:42:47,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-02-14 21:42:47,094 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-02-14 21:42:47,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:47,236 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2022-02-14 21:42:47,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 21:42:47,237 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2022-02-14 21:42:47,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:47,237 INFO L225 Difference]: With dead ends: 108 [2022-02-14 21:42:47,237 INFO L226 Difference]: Without dead ends: 108 [2022-02-14 21:42:47,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 143 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-02-14 21:42:47,238 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 36 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:47,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 465 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:42:47,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-14 21:42:47,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-02-14 21:42:47,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 72 states have (on average 1.125) internal successors, (81), 75 states have internal predecessors, (81), 21 states have call successors, (21), 11 states have call predecessors, (21), 12 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-02-14 21:42:47,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2022-02-14 21:42:47,241 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 70 [2022-02-14 21:42:47,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:47,241 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2022-02-14 21:42:47,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-02-14 21:42:47,241 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2022-02-14 21:42:47,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-14 21:42:47,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:47,242 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:47,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 21:42:47,451 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,SelfDestructingSolverStorable13 [2022-02-14 21:42:47,452 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:47,452 INFO L85 PathProgramCache]: Analyzing trace with hash -633726750, now seen corresponding path program 4 times [2022-02-14 21:42:47,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:47,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643240849] [2022-02-14 21:42:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:47,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:47,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:47,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:47,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:47,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:42:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:48,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:42:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:48,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:48,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:42:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:48,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:42:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-02-14 21:42:50,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:50,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643240849] [2022-02-14 21:42:50,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643240849] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:42:50,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628818376] [2022-02-14 21:42:50,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 21:42:50,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:42:50,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:42:50,541 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) [2022-02-14 21:42:50,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 21:42:50,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 21:42:50,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:42:50,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 77 conjunts are in the unsatisfiable core [2022-02-14 21:42:50,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:42:50,633 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 7 treesize of output 6 [2022-02-14 21:43:02,473 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 0 case distinctions, treesize of input 29 treesize of output 24 [2022-02-14 21:43:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-02-14 21:43:14,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:43:14,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628818376] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:43:14,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:43:14,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 46 [2022-02-14 21:43:14,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975050126] [2022-02-14 21:43:14,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:43:14,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-14 21:43:14,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:43:14,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-14 21:43:14,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1957, Unknown=13, NotChecked=0, Total=2162 [2022-02-14 21:43:14,209 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand has 46 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 39 states have internal predecessors, (68), 9 states have call successors, (16), 4 states have call predecessors, (16), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-02-14 21:43:34,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:43:34,812 INFO L93 Difference]: Finished difference Result 149 states and 176 transitions. [2022-02-14 21:43:34,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-14 21:43:34,813 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 39 states have internal predecessors, (68), 9 states have call successors, (16), 4 states have call predecessors, (16), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) Word has length 67 [2022-02-14 21:43:34,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:43:34,814 INFO L225 Difference]: With dead ends: 149 [2022-02-14 21:43:34,814 INFO L226 Difference]: Without dead ends: 133 [2022-02-14 21:43:34,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1715 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=550, Invalid=5745, Unknown=25, NotChecked=0, Total=6320 [2022-02-14 21:43:34,815 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 148 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-14 21:43:34,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 224 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1646 Invalid, 0 Unknown, 190 Unchecked, 1.3s Time] [2022-02-14 21:43:34,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-02-14 21:43:34,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2022-02-14 21:43:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 84 states have internal predecessors, (93), 21 states have call successors, (21), 11 states have call predecessors, (21), 12 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-02-14 21:43:34,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2022-02-14 21:43:34,819 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 67 [2022-02-14 21:43:34,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:43:34,820 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2022-02-14 21:43:34,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 39 states have internal predecessors, (68), 9 states have call successors, (16), 4 states have call predecessors, (16), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-02-14 21:43:34,820 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2022-02-14 21:43:34,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-14 21:43:34,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:43:34,820 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:43:34,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-02-14 21:43:35,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-14 21:43:35,035 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:43:35,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:43:35,036 INFO L85 PathProgramCache]: Analyzing trace with hash -516817935, now seen corresponding path program 1 times [2022-02-14 21:43:35,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:43:35,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821769680] [2022-02-14 21:43:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:43:35,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:43:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:35,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:43:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:35,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:43:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:35,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:43:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:35,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:43:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:35,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:43:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:35,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:43:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:35,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:43:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:35,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:43:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:35,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 21:43:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:35,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-14 21:43:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:35,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 21:43:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-02-14 21:43:35,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:43:35,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821769680] [2022-02-14 21:43:35,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821769680] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:43:35,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380342519] [2022-02-14 21:43:35,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:43:35,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:43:35,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:43:35,288 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) [2022-02-14 21:43:35,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-14 21:43:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:35,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-14 21:43:35,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:43:35,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-02-14 21:43:35,555 INFO L353 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-02-14 21:43:35,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2022-02-14 21:43:35,881 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-02-14 21:43:35,881 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 29 treesize of output 17 [2022-02-14 21:43:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-14 21:43:35,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:43:36,104 INFO L353 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-02-14 21:43:36,104 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 670 treesize of output 606 [2022-02-14 21:43:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-14 21:43:36,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380342519] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:43:36,581 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:43:36,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 11] total 31 [2022-02-14 21:43:36,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677254226] [2022-02-14 21:43:36,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:43:36,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-14 21:43:36,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:43:36,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-14 21:43:36,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-02-14 21:43:36,582 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand has 31 states, 25 states have (on average 2.92) internal successors, (73), 27 states have internal predecessors, (73), 10 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (18), 5 states have call predecessors, (18), 8 states have call successors, (18) [2022-02-14 21:43:38,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:43:38,191 INFO L93 Difference]: Finished difference Result 179 states and 209 transitions. [2022-02-14 21:43:38,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-14 21:43:38,192 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 2.92) internal successors, (73), 27 states have internal predecessors, (73), 10 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (18), 5 states have call predecessors, (18), 8 states have call successors, (18) Word has length 73 [2022-02-14 21:43:38,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:43:38,193 INFO L225 Difference]: With dead ends: 179 [2022-02-14 21:43:38,193 INFO L226 Difference]: Without dead ends: 179 [2022-02-14 21:43:38,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 150 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=430, Invalid=3230, Unknown=0, NotChecked=0, Total=3660 [2022-02-14 21:43:38,195 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 199 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-14 21:43:38,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 84 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1664 Invalid, 0 Unknown, 127 Unchecked, 0.8s Time] [2022-02-14 21:43:38,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-14 21:43:38,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2022-02-14 21:43:38,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 102 states have internal predecessors, (112), 24 states have call successors, (24), 14 states have call predecessors, (24), 16 states have return successors, (25), 22 states have call predecessors, (25), 22 states have call successors, (25) [2022-02-14 21:43:38,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2022-02-14 21:43:38,199 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 73 [2022-02-14 21:43:38,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:43:38,202 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2022-02-14 21:43:38,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 2.92) internal successors, (73), 27 states have internal predecessors, (73), 10 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (18), 5 states have call predecessors, (18), 8 states have call successors, (18) [2022-02-14 21:43:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2022-02-14 21:43:38,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-14 21:43:38,203 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:43:38,204 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:43:38,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-02-14 21:43:38,419 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,SelfDestructingSolverStorable15 [2022-02-14 21:43:38,419 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:43:38,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:43:38,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2020932442, now seen corresponding path program 1 times [2022-02-14 21:43:38,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:43:38,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637610240] [2022-02-14 21:43:38,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:43:38,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:43:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:38,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:43:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:38,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:43:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:38,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:43:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:38,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:43:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:38,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:43:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:38,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:43:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:38,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:43:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:38,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:43:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:38,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-14 21:43:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:38,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 21:43:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:38,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-14 21:43:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:38,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-02-14 21:43:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-02-14 21:43:38,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:43:38,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637610240] [2022-02-14 21:43:38,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637610240] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:43:38,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787914356] [2022-02-14 21:43:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:43:38,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:43:38,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:43:38,822 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) [2022-02-14 21:43:38,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-14 21:43:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:43:38,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 118 conjunts are in the unsatisfiable core [2022-02-14 21:43:38,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:43:38,929 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 7 treesize of output 6 [2022-02-14 21:43:38,995 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 6 treesize of output 4 [2022-02-14 21:43:41,196 WARN L860 $PredicateComparison]: unable to prove that (exists ((mkdup_~j~0 Int) (mkdup_~x~0 Int) (mkdup_~i~0 Int)) (and (<= 0 mkdup_~j~0) (not (= mkdup_~j~0 mkdup_~i~0)) (= (store |c_old(#memory_int)| |c_mkdup_#in~a.base| (store (store (select |c_old(#memory_int)| |c_mkdup_#in~a.base|) (+ |c_mkdup_#in~a.offset| (* mkdup_~i~0 4)) mkdup_~x~0) (+ (* mkdup_~j~0 4) |c_mkdup_#in~a.offset|) mkdup_~x~0)) |c_#memory_int|) (<= 0 mkdup_~i~0))) is different from true [2022-02-14 21:43:41,234 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 0 case distinctions, treesize of input 29 treesize of output 24 [2022-02-14 21:43:45,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-02-14 21:43:47,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 21:43:47,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 52 [2022-02-14 21:43:47,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 21:43:47,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 21:43:47,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 52 [2022-02-14 21:43:47,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-02-14 21:43:47,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-02-14 21:44:47,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 21:44:47,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 21:44:47,186 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-02-14 21:44:47,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 47 [2022-02-14 21:44:47,191 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 26 treesize of output 22 [2022-02-14 21:44:47,194 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 26 treesize of output 22 [2022-02-14 21:44:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-02-14 21:44:47,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:45:02,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-14 21:45:02,380 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 6 treesize of output 4 [2022-02-14 21:45:09,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787914356] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:45:09,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:45:09,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 39 [2022-02-14 21:45:09,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473993997] [2022-02-14 21:45:09,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:45:09,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-14 21:45:09,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:45:09,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-14 21:45:09,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2168, Unknown=14, NotChecked=94, Total=2450 [2022-02-14 21:45:09,003 INFO L87 Difference]: Start difference. First operand 139 states and 161 transitions. Second operand has 39 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 13 states have call successors, (26), 6 states have call predecessors, (26), 8 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2022-02-14 21:46:07,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:46:07,615 INFO L93 Difference]: Finished difference Result 187 states and 214 transitions. [2022-02-14 21:46:07,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-14 21:46:07,615 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 13 states have call successors, (26), 6 states have call predecessors, (26), 8 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) Word has length 76 [2022-02-14 21:46:07,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:46:07,616 INFO L225 Difference]: With dead ends: 187 [2022-02-14 21:46:07,616 INFO L226 Difference]: Without dead ends: 119 [2022-02-14 21:46:07,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 145.0s TimeCoverageRelationStatistics Valid=393, Invalid=4971, Unknown=42, NotChecked=144, Total=5550 [2022-02-14 21:46:07,617 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 91 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 21:46:07,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 215 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1419 Invalid, 0 Unknown, 234 Unchecked, 0.7s Time] [2022-02-14 21:46:07,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-14 21:46:07,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-02-14 21:46:07,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 85 states have internal predecessors, (93), 21 states have call successors, (21), 11 states have call predecessors, (21), 12 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-02-14 21:46:07,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2022-02-14 21:46:07,621 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 76 [2022-02-14 21:46:07,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:46:07,621 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2022-02-14 21:46:07,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 13 states have call successors, (26), 6 states have call predecessors, (26), 8 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2022-02-14 21:46:07,621 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2022-02-14 21:46:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-14 21:46:07,622 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:46:07,622 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:46:07,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-14 21:46:07,822 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,SelfDestructingSolverStorable16 [2022-02-14 21:46:07,822 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:46:07,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:46:07,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1723575464, now seen corresponding path program 5 times [2022-02-14 21:46:07,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:46:07,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196269234] [2022-02-14 21:46:07,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:46:07,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:46:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:07,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:46:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:07,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:46:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:07,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:46:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:07,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:46:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:07,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:46:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:07,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:46:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:07,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:46:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:07,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:46:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 43 proven. 15 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-02-14 21:46:07,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:46:07,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196269234] [2022-02-14 21:46:07,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196269234] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:46:07,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666810266] [2022-02-14 21:46:07,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 21:46:07,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:46:07,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:46:07,916 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) [2022-02-14 21:46:07,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-14 21:46:07,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-14 21:46:07,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:46:07,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-14 21:46:07,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:46:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 43 proven. 15 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-02-14 21:46:08,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:46:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 43 proven. 15 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-02-14 21:46:08,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666810266] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:46:08,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:46:08,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 11 [2022-02-14 21:46:08,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654585181] [2022-02-14 21:46:08,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:46:08,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 21:46:08,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:46:08,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 21:46:08,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-02-14 21:46:08,214 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-14 21:46:08,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:46:08,557 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2022-02-14 21:46:08,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-14 21:46:08,557 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 76 [2022-02-14 21:46:08,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:46:08,558 INFO L225 Difference]: With dead ends: 143 [2022-02-14 21:46:08,558 INFO L226 Difference]: Without dead ends: 141 [2022-02-14 21:46:08,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2022-02-14 21:46:08,559 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 110 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 21:46:08,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 57 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 21:46:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-02-14 21:46:08,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 131. [2022-02-14 21:46:08,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 100 states have internal predecessors, (111), 21 states have call successors, (21), 11 states have call predecessors, (21), 12 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-02-14 21:46:08,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2022-02-14 21:46:08,562 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 76 [2022-02-14 21:46:08,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:46:08,563 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2022-02-14 21:46:08,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-14 21:46:08,563 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2022-02-14 21:46:08,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-14 21:46:08,563 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:46:08,563 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:46:08,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-14 21:46:08,780 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,SelfDestructingSolverStorable17 [2022-02-14 21:46:08,780 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:46:08,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:46:08,781 INFO L85 PathProgramCache]: Analyzing trace with hash 181119312, now seen corresponding path program 6 times [2022-02-14 21:46:08,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:46:08,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349249979] [2022-02-14 21:46:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:46:08,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:46:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:08,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:46:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:08,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:46:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:08,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:46:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:08,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:46:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:09,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:46:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:09,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:46:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:09,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:46:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:09,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:46:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:46:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 14 proven. 83 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-02-14 21:46:14,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:46:14,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349249979] [2022-02-14 21:46:14,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349249979] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:46:14,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370236422] [2022-02-14 21:46:14,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 21:46:14,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:46:14,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:46:14,159 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) [2022-02-14 21:46:14,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-14 21:46:14,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-14 21:46:14,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:46:14,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 101 conjunts are in the unsatisfiable core [2022-02-14 21:46:14,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:46:14,317 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 7 treesize of output 6 [2022-02-14 21:46:16,629 WARN L860 $PredicateComparison]: unable to prove that (exists ((mkdup_~j~0 Int) (mkdup_~x~0 Int) (mkdup_~i~0 Int)) (and (< mkdup_~j~0 |c_mkdup_#in~n|) (<= 0 mkdup_~j~0) (not (= mkdup_~j~0 mkdup_~i~0)) (= (store |c_old(#memory_int)| |c_mkdup_#in~a.base| (store (store (select |c_old(#memory_int)| |c_mkdup_#in~a.base|) (+ |c_mkdup_#in~a.offset| (* mkdup_~i~0 4)) mkdup_~x~0) (+ (* mkdup_~j~0 4) |c_mkdup_#in~a.offset|) mkdup_~x~0)) |c_#memory_int|) (< mkdup_~i~0 |c_mkdup_#in~n|) (<= 0 mkdup_~i~0))) is different from true [2022-02-14 21:46:16,674 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 0 case distinctions, treesize of input 29 treesize of output 24 [2022-02-14 21:46:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 81 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-02-14 21:46:22,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:46:23,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370236422] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:46:23,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:46:23,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 38] total 67 [2022-02-14 21:46:23,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420375872] [2022-02-14 21:46:23,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:46:23,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-14 21:46:23,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:46:23,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-14 21:46:23,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=4117, Unknown=4, NotChecked=130, Total=4556 [2022-02-14 21:46:23,408 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand has 67 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 59 states have internal predecessors, (94), 11 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2022-02-14 21:48:28,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:48:28,312 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2022-02-14 21:48:28,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-14 21:48:28,313 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 59 states have internal predecessors, (94), 11 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) Word has length 79 [2022-02-14 21:48:28,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:48:28,313 INFO L225 Difference]: With dead ends: 149 [2022-02-14 21:48:28,313 INFO L226 Difference]: Without dead ends: 133 [2022-02-14 21:48:28,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5231 ImplicationChecksByTransitivity, 133.2s TimeCoverageRelationStatistics Valid=1032, Invalid=16215, Unknown=49, NotChecked=260, Total=17556 [2022-02-14 21:48:28,317 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 54 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 2263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 742 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-14 21:48:28,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 233 Invalid, 2263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1462 Invalid, 0 Unknown, 742 Unchecked, 1.5s Time] [2022-02-14 21:48:28,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-02-14 21:48:28,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2022-02-14 21:48:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 97 states have internal predecessors, (107), 21 states have call successors, (21), 11 states have call predecessors, (21), 12 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-02-14 21:48:28,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 149 transitions. [2022-02-14 21:48:28,320 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 149 transitions. Word has length 79 [2022-02-14 21:48:28,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:48:28,320 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 149 transitions. [2022-02-14 21:48:28,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 59 states have internal predecessors, (94), 11 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2022-02-14 21:48:28,320 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 149 transitions. [2022-02-14 21:48:28,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-14 21:48:28,321 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:48:28,321 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:48:28,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-02-14 21:48:28,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:28,534 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:48:28,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:48:28,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1729343584, now seen corresponding path program 1 times [2022-02-14 21:48:28,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:48:28,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080399776] [2022-02-14 21:48:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:28,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:48:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:28,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:48:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:28,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:48:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:28,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:48:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:28,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:48:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:28,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:48:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:28,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:48:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:28,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:48:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:28,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:48:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:28,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 21:48:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:28,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-14 21:48:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:28,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-14 21:48:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:28,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-14 21:48:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-02-14 21:48:28,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:48:28,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080399776] [2022-02-14 21:48:28,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080399776] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:48:28,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832670235] [2022-02-14 21:48:28,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:28,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:28,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:48:28,877 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) [2022-02-14 21:48:28,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-14 21:48:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:28,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 86 conjunts are in the unsatisfiable core [2022-02-14 21:48:28,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:48:28,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-02-14 21:48:29,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-02-14 21:48:29,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 21:48:29,223 INFO L353 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-02-14 21:48:29,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 18 [2022-02-14 21:48:29,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 21:48:29,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 21:48:29,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 39 [2022-02-14 21:48:29,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 21:48:29,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 36 [2022-02-14 21:48:29,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-02-14 21:48:29,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-02-14 21:48:34,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 21:48:34,636 INFO L353 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-02-14 21:48:34,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 36 [2022-02-14 21:48:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-02-14 21:48:34,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:48:34,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832670235] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:48:34,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:48:34,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2022-02-14 21:48:34,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565130845] [2022-02-14 21:48:34,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:48:34,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-14 21:48:34,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:48:34,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-14 21:48:34,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=841, Unknown=1, NotChecked=0, Total=930 [2022-02-14 21:48:34,939 INFO L87 Difference]: Start difference. First operand 128 states and 149 transitions. Second operand has 29 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 10 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) [2022-02-14 21:48:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:48:39,430 INFO L93 Difference]: Finished difference Result 180 states and 205 transitions. [2022-02-14 21:48:39,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-14 21:48:39,431 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 10 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) Word has length 85 [2022-02-14 21:48:39,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:48:39,431 INFO L225 Difference]: With dead ends: 180 [2022-02-14 21:48:39,431 INFO L226 Difference]: Without dead ends: 121 [2022-02-14 21:48:39,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 115 SyntacticMatches, 12 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=320, Invalid=3100, Unknown=2, NotChecked=0, Total=3422 [2022-02-14 21:48:39,432 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 138 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 21:48:39,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 196 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 882 Invalid, 0 Unknown, 226 Unchecked, 0.5s Time] [2022-02-14 21:48:39,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-14 21:48:39,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2022-02-14 21:48:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 86 states have internal predecessors, (92), 18 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) [2022-02-14 21:48:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2022-02-14 21:48:39,435 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 85 [2022-02-14 21:48:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:48:39,436 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2022-02-14 21:48:39,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 10 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) [2022-02-14 21:48:39,436 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2022-02-14 21:48:39,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-14 21:48:39,436 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:48:39,436 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:48:39,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-14 21:48:39,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:39,649 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:48:39,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:48:39,650 INFO L85 PathProgramCache]: Analyzing trace with hash 74091419, now seen corresponding path program 1 times [2022-02-14 21:48:39,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:48:39,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694346095] [2022-02-14 21:48:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:39,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:48:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:39,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:48:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:39,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:48:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:39,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:48:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:39,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:48:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:39,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:48:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:39,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:48:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:39,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:48:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:39,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:48:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:39,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-14 21:48:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:39,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 21:48:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:39,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-02-14 21:48:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-14 21:48:39,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:48:39,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694346095] [2022-02-14 21:48:39,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694346095] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:48:39,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323153982] [2022-02-14 21:48:39,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:39,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:39,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:48:39,767 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) [2022-02-14 21:48:39,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-14 21:48:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:39,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 21:48:39,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:48:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-02-14 21:48:39,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:48:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-14 21:48:40,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323153982] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:48:40,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:48:40,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 13 [2022-02-14 21:48:40,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903194272] [2022-02-14 21:48:40,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:48:40,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-14 21:48:40,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:48:40,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-14 21:48:40,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-02-14 21:48:40,091 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-14 21:48:40,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:48:40,462 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2022-02-14 21:48:40,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-14 21:48:40,463 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 88 [2022-02-14 21:48:40,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:48:40,464 INFO L225 Difference]: With dead ends: 143 [2022-02-14 21:48:40,464 INFO L226 Difference]: Without dead ends: 134 [2022-02-14 21:48:40,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2022-02-14 21:48:40,464 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 119 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 21:48:40,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 56 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 21:48:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-14 21:48:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 126. [2022-02-14 21:48:40,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 98 states have internal predecessors, (106), 18 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) [2022-02-14 21:48:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 140 transitions. [2022-02-14 21:48:40,467 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 140 transitions. Word has length 88 [2022-02-14 21:48:40,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:48:40,467 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 140 transitions. [2022-02-14 21:48:40,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-14 21:48:40,468 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 140 transitions. [2022-02-14 21:48:40,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-14 21:48:40,468 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:48:40,468 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:48:40,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-14 21:48:40,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:40,679 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:48:40,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:48:40,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1973629885, now seen corresponding path program 2 times [2022-02-14 21:48:40,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:48:40,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117136961] [2022-02-14 21:48:40,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:48:40,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:48:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:40,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:48:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:40,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:48:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:40,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:48:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:40,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:48:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:41,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:48:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:41,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:48:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:41,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:48:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:41,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:48:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:48,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-02-14 21:48:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:48,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-14 21:48:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:48,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-14 21:48:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:48:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 19 proven. 60 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-14 21:48:48,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:48:48,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117136961] [2022-02-14 21:48:48,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117136961] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:48:48,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324942040] [2022-02-14 21:48:48,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 21:48:48,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:48:48,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:48:48,659 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) [2022-02-14 21:48:48,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-14 21:48:48,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 21:48:48,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:48:48,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 101 conjunts are in the unsatisfiable core [2022-02-14 21:48:48,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:48:48,785 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 7 treesize of output 6 [2022-02-14 21:48:51,010 WARN L860 $PredicateComparison]: unable to prove that (exists ((mkdup_~j~0 Int) (mkdup_~x~0 Int) (mkdup_~i~0 Int)) (and (not (= mkdup_~j~0 mkdup_~i~0)) (= (store |c_old(#memory_int)| |c_mkdup_#in~a.base| (store (store (select |c_old(#memory_int)| |c_mkdup_#in~a.base|) (+ |c_mkdup_#in~a.offset| (* mkdup_~i~0 4)) mkdup_~x~0) (+ (* mkdup_~j~0 4) |c_mkdup_#in~a.offset|) mkdup_~x~0)) |c_#memory_int|) (< mkdup_~i~0 |c_mkdup_#in~n|) (<= 0 mkdup_~i~0))) is different from true [2022-02-14 21:48:51,036 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 0 case distinctions, treesize of input 29 treesize of output 24 [2022-02-14 21:48:53,064 WARN L860 $PredicateComparison]: unable to prove that (exists ((mkdup_~j~0 Int) (mkdup_~x~0 Int) (mkdup_~i~0 Int)) (and (< mkdup_~i~0 c_main_~n~0) (not (= mkdup_~j~0 mkdup_~i~0)) (<= 0 mkdup_~i~0) (= (store (store ((as const (Array Int Int)) 0) (+ c_main_~a~0.offset (* mkdup_~i~0 4)) mkdup_~x~0) (+ (* mkdup_~j~0 4) c_main_~a~0.offset) mkdup_~x~0) (select |c_#memory_int| c_main_~a~0.base)))) is different from true [2022-02-14 21:48:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 9 proven. 68 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-02-14 21:48:56,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:48:57,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324942040] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:48:57,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:48:57,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 38] total 64 [2022-02-14 21:48:57,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503817177] [2022-02-14 21:48:57,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 21:48:57,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-14 21:48:57,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:48:57,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-14 21:48:57,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=3519, Unknown=2, NotChecked=246, Total=4160 [2022-02-14 21:48:57,134 INFO L87 Difference]: Start difference. First operand 126 states and 140 transitions. Second operand has 64 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 58 states have internal predecessors, (89), 8 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-02-14 21:49:24,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:49:24,143 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2022-02-14 21:49:24,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-14 21:49:24,145 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 58 states have internal predecessors, (89), 8 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) Word has length 91 [2022-02-14 21:49:24,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:49:24,146 INFO L225 Difference]: With dead ends: 122 [2022-02-14 21:49:24,146 INFO L226 Difference]: Without dead ends: 118 [2022-02-14 21:49:24,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 4116 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=1168, Invalid=12171, Unknown=9, NotChecked=458, Total=13806 [2022-02-14 21:49:24,147 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 184 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 2356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-14 21:49:24,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 102 Invalid, 2356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1847 Invalid, 0 Unknown, 318 Unchecked, 2.4s Time] [2022-02-14 21:49:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-02-14 21:49:24,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 102. [2022-02-14 21:49:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.1) internal successors, (88), 81 states have internal predecessors, (88), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 21:49:24,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2022-02-14 21:49:24,149 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 91 [2022-02-14 21:49:24,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:49:24,150 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2022-02-14 21:49:24,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 58 states have internal predecessors, (89), 8 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-02-14 21:49:24,150 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2022-02-14 21:49:24,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-14 21:49:24,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:49:24,150 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:49:24,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-14 21:49:24,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-02-14 21:49:24,366 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:49:24,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:49:24,366 INFO L85 PathProgramCache]: Analyzing trace with hash -507134286, now seen corresponding path program 7 times [2022-02-14 21:49:24,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:49:24,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643211151] [2022-02-14 21:49:24,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:49:24,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:49:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:49:24,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:49:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:49:24,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:49:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:49:24,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:49:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:49:24,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 21:49:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:49:24,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-14 21:49:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:49:24,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:49:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:49:24,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 21:49:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:49:24,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-14 21:49:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:49:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 107 proven. 22 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-02-14 21:49:24,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:49:24,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643211151] [2022-02-14 21:49:24,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643211151] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:49:24,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905485201] [2022-02-14 21:49:24,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 21:49:24,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:49:24,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:49:24,484 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) [2022-02-14 21:49:24,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-14 21:49:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:49:24,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 21:49:24,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:49:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 51 proven. 89 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-02-14 21:49:24,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:49:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 51 proven. 89 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-02-14 21:49:24,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905485201] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:49:24,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:49:24,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2022-02-14 21:49:24,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770538300] [2022-02-14 21:49:24,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:49:24,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-14 21:49:24,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:49:24,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-14 21:49:24,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-02-14 21:49:24,851 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 11 states have internal predecessors, (62), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-14 21:49:25,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:49:25,152 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-02-14 21:49:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-14 21:49:25,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 11 states have internal predecessors, (62), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 88 [2022-02-14 21:49:25,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:49:25,153 INFO L225 Difference]: With dead ends: 73 [2022-02-14 21:49:25,153 INFO L226 Difference]: Without dead ends: 0 [2022-02-14 21:49:25,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2022-02-14 21:49:25,153 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 43 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:49:25,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:49:25,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-14 21:49:25,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-14 21:49:25,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-14 21:49:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-14 21:49:25,154 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 88 [2022-02-14 21:49:25,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:49:25,154 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-14 21:49:25,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 11 states have internal predecessors, (62), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-14 21:49:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-14 21:49:25,154 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-14 21:49:25,156 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 21:49:25,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-14 21:49:25,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:49:25,366 INFO L732 BasicCegarLoop]: Path program histogram: [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:49:25,367 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 21:49:25,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 09:49:25 BasicIcfg [2022-02-14 21:49:25,368 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 21:49:25,368 INFO L158 Benchmark]: Toolchain (without parser) took 424875.73ms. Allocated memory was 181.4MB in the beginning and 272.6MB in the end (delta: 91.2MB). Free memory was 132.8MB in the beginning and 140.4MB in the end (delta: -7.6MB). Peak memory consumption was 84.3MB. Max. memory is 8.0GB. [2022-02-14 21:49:25,369 INFO L158 Benchmark]: CDTParser took 0.47ms. Allocated memory is still 181.4MB. Free memory was 149.3MB in the beginning and 149.2MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 21:49:25,369 INFO L158 Benchmark]: CACSL2BoogieTranslator took 171.84ms. Allocated memory is still 181.4MB. Free memory was 132.5MB in the beginning and 157.6MB in the end (delta: -25.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-14 21:49:25,369 INFO L158 Benchmark]: Boogie Preprocessor took 23.40ms. Allocated memory is still 181.4MB. Free memory was 157.6MB in the beginning and 156.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-14 21:49:25,369 INFO L158 Benchmark]: RCFGBuilder took 282.28ms. Allocated memory is still 181.4MB. Free memory was 156.0MB in the beginning and 141.9MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-02-14 21:49:25,369 INFO L158 Benchmark]: IcfgTransformer took 24.25ms. Allocated memory is still 181.4MB. Free memory was 141.9MB in the beginning and 139.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-14 21:49:25,369 INFO L158 Benchmark]: TraceAbstraction took 424369.56ms. Allocated memory was 181.4MB in the beginning and 272.6MB in the end (delta: 91.2MB). Free memory was 139.8MB in the beginning and 140.4MB in the end (delta: -658.2kB). Peak memory consumption was 92.1MB. Max. memory is 8.0GB. [2022-02-14 21:49:25,370 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47ms. Allocated memory is still 181.4MB. Free memory was 149.3MB in the beginning and 149.2MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 171.84ms. Allocated memory is still 181.4MB. Free memory was 132.5MB in the beginning and 157.6MB in the end (delta: -25.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.40ms. Allocated memory is still 181.4MB. Free memory was 157.6MB in the beginning and 156.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 282.28ms. Allocated memory is still 181.4MB. Free memory was 156.0MB in the beginning and 141.9MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * IcfgTransformer took 24.25ms. Allocated memory is still 181.4MB. Free memory was 141.9MB in the beginning and 139.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 424369.56ms. Allocated memory was 181.4MB in the beginning and 272.6MB in the end (delta: 91.2MB). Free memory was 139.8MB in the beginning and 140.4MB in the end (delta: -658.2kB). Peak memory consumption was 92.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 10]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 424.3s, OverallIterations: 23, TraceHistogramMax: 8, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 244.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2216 SdHoareTripleChecker+Valid, 10.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2101 mSDsluCounter, 3319 SdHoareTripleChecker+Invalid, 8.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2215 IncrementalHoareTripleChecker+Unchecked, 2249 mSDsCounter, 1603 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15093 IncrementalHoareTripleChecker+Invalid, 18911 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1603 mSolverCounterUnsat, 1070 mSDtfsCounter, 15093 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3108 GetRequests, 2178 SyntacticMatches, 50 SemanticMatches, 880 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 15742 ImplicationChecksByTransitivity, 381.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred in iteration=16, InterpolantAutomatonStates: 511, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 23 MinimizatonAttempts, 206 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 174.2s InterpolantComputationTime, 2726 NumberOfCodeBlocks, 2694 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 3351 ConstructedInterpolants, 160 QuantifiedInterpolants, 37741 SizeOfPredicates, 212 NumberOfNonLiveVariables, 4622 ConjunctsInSsa, 737 ConjunctsInUnsatCore, 50 InterpolantComputations, 9 PerfectInterpolantSequences, 2040/2875 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-14 21:49:25,575 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-02-14 21:49:25,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...