/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 07:41:17,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 07:41:17,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 07:41:17,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 07:41:17,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 07:41:17,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 07:41:17,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 07:41:17,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 07:41:17,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 07:41:17,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 07:41:17,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 07:41:17,704 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 07:41:17,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 07:41:17,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 07:41:17,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 07:41:17,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 07:41:17,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 07:41:17,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 07:41:17,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 07:41:17,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 07:41:17,710 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 07:41:17,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 07:41:17,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 07:41:17,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 07:41:17,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 07:41:17,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 07:41:17,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 07:41:17,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 07:41:17,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 07:41:17,735 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 07:41:17,760 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 07:41:17,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 07:41:17,761 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 07:41:17,761 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 07:41:17,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 07:41:17,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 07:41:17,762 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 07:41:17,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 07:41:17,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 07:41:17,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 07:41:17,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 07:41:17,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 07:41:17,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 07:41:17,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 07:41:17,764 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 07:41:17,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 07:41:17,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 07:41:17,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 07:41:17,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 07:41:17,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 07:41:17,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 07:41:17,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 07:41:17,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 07:41:17,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 07:41:17,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 07:41:17,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 07:41:17,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 07:41:17,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 07:41:17,767 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 07:41:17,767 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 07:41:18,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 07:41:18,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 07:41:18,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 07:41:18,025 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 07:41:18,026 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 07:41:18,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2022-04-05 07:41:18,072 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e9a42a14/fd1e8ca20c8c427db9db63cf5737c4a4/FLAG554cfaaa5 [2022-04-05 07:41:18,446 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 07:41:18,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2022-04-05 07:41:18,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e9a42a14/fd1e8ca20c8c427db9db63cf5737c4a4/FLAG554cfaaa5 [2022-04-05 07:41:18,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e9a42a14/fd1e8ca20c8c427db9db63cf5737c4a4 [2022-04-05 07:41:18,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 07:41:18,842 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 07:41:18,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 07:41:18,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 07:41:18,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 07:41:18,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:41:18" (1/1) ... [2022-04-05 07:41:18,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b19b905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:41:18, skipping insertion in model container [2022-04-05 07:41:18,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:41:18" (1/1) ... [2022-04-05 07:41:18,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 07:41:18,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 07:41:19,015 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c[490,503] [2022-04-05 07:41:19,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 07:41:19,047 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 07:41:19,057 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c[490,503] [2022-04-05 07:41:19,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 07:41:19,074 INFO L208 MainTranslator]: Completed translation [2022-04-05 07:41:19,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:41:19 WrapperNode [2022-04-05 07:41:19,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 07:41:19,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 07:41:19,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 07:41:19,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 07:41:19,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:41:19" (1/1) ... [2022-04-05 07:41:19,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:41:19" (1/1) ... [2022-04-05 07:41:19,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:41:19" (1/1) ... [2022-04-05 07:41:19,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:41:19" (1/1) ... [2022-04-05 07:41:19,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:41:19" (1/1) ... [2022-04-05 07:41:19,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:41:19" (1/1) ... [2022-04-05 07:41:19,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:41:19" (1/1) ... [2022-04-05 07:41:19,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 07:41:19,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 07:41:19,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 07:41:19,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 07:41:19,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:41:19" (1/1) ... [2022-04-05 07:41:19,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 07:41:19,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:19,122 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) [2022-04-05 07:41:19,124 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 [2022-04-05 07:41:19,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 07:41:19,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 07:41:19,154 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 07:41:19,154 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 07:41:19,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 07:41:19,155 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 07:41:19,155 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 07:41:19,156 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 07:41:19,156 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 07:41:19,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 07:41:19,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 07:41:19,157 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 07:41:19,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 07:41:19,157 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 07:41:19,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 07:41:19,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 07:41:19,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 07:41:19,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 07:41:19,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 07:41:19,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 07:41:19,220 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 07:41:19,221 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 07:41:19,410 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 07:41:19,415 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 07:41:19,415 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-05 07:41:19,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:41:19 BoogieIcfgContainer [2022-04-05 07:41:19,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 07:41:19,417 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 07:41:19,417 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 07:41:19,418 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 07:41:19,420 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:41:19" (1/1) ... [2022-04-05 07:41:19,421 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 07:41:19,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:41:19 BasicIcfg [2022-04-05 07:41:19,438 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 07:41:19,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 07:41:19,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 07:41:19,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 07:41:19,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 07:41:18" (1/4) ... [2022-04-05 07:41:19,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c612f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:41:19, skipping insertion in model container [2022-04-05 07:41:19,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:41:19" (2/4) ... [2022-04-05 07:41:19,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c612f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:41:19, skipping insertion in model container [2022-04-05 07:41:19,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:41:19" (3/4) ... [2022-04-05 07:41:19,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c612f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 07:41:19, skipping insertion in model container [2022-04-05 07:41:19,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:41:19" (4/4) ... [2022-04-05 07:41:19,444 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound1.cqvasr [2022-04-05 07:41:19,448 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 07:41:19,448 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 07:41:19,482 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 07:41:19,487 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-04-05 07:41:19,488 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 07:41:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 07:41:19,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 07:41:19,505 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:19,506 INFO L499 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] [2022-04-05 07:41:19,506 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:19,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:19,510 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-04-05 07:41:19,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:19,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727219794] [2022-04-05 07:41:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:19,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:19,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 07:41:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:19,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 07:41:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:19,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-05 07:41:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:19,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-05 07:41:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:19,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 07:41:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 07:41:19,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:41:19,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727219794] [2022-04-05 07:41:19,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727219794] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:41:19,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:41:19,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 07:41:19,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292413676] [2022-04-05 07:41:19,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:41:19,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 07:41:19,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:41:19,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 07:41:19,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:41:19,808 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:41:19,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:19,901 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-04-05 07:41:19,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 07:41:19,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-05 07:41:19,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:19,910 INFO L225 Difference]: With dead ends: 73 [2022-04-05 07:41:19,911 INFO L226 Difference]: Without dead ends: 35 [2022-04-05 07:41:19,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:41:19,919 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:19,921 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:41:19,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-05 07:41:19,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-05 07:41:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 07:41:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-04-05 07:41:19,965 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-04-05 07:41:19,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:19,965 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-04-05 07:41:19,965 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:41:19,966 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-04-05 07:41:19,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 07:41:19,967 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:19,967 INFO L499 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] [2022-04-05 07:41:19,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 07:41:19,968 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:19,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:19,969 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-04-05 07:41:19,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:19,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965330417] [2022-04-05 07:41:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:19,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:19,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:41:19,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596303504] [2022-04-05 07:41:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:19,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:19,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:19,990 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) [2022-04-05 07:41:19,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 07:41:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:20,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:41:20,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:41:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 07:41:20,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:41:20,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:41:20,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965330417] [2022-04-05 07:41:20,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:41:20,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596303504] [2022-04-05 07:41:20,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596303504] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:41:20,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:41:20,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 07:41:20,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609548368] [2022-04-05 07:41:20,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:41:20,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 07:41:20,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:41:20,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 07:41:20,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:41:20,221 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 07:41:20,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:20,322 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-04-05 07:41:20,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:41:20,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-04-05 07:41:20,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:20,324 INFO L225 Difference]: With dead ends: 54 [2022-04-05 07:41:20,324 INFO L226 Difference]: Without dead ends: 47 [2022-04-05 07:41:20,324 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 07:41:20,325 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:20,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 133 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:41:20,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-05 07:41:20,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-04-05 07:41:20,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 07:41:20,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-04-05 07:41:20,335 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-04-05 07:41:20,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:20,335 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-04-05 07:41:20,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 07:41:20,336 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-04-05 07:41:20,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 07:41:20,337 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:20,337 INFO L499 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] [2022-04-05 07:41:20,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 07:41:20,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:20,560 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:20,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:20,560 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-04-05 07:41:20,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:20,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190200611] [2022-04-05 07:41:20,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:20,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:20,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:41:20,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727603147] [2022-04-05 07:41:20,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:20,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:20,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:20,589 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) [2022-04-05 07:41:20,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 07:41:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:20,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-05 07:41:20,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:41:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 07:41:20,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:41:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 07:41:21,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:41:21,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190200611] [2022-04-05 07:41:21,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:41:21,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727603147] [2022-04-05 07:41:21,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727603147] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 07:41:21,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:41:21,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-04-05 07:41:21,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3859150] [2022-04-05 07:41:21,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:41:21,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 07:41:21,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:41:21,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 07:41:21,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:41:21,204 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 07:41:21,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:21,293 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-04-05 07:41:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 07:41:21,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-04-05 07:41:21,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:21,294 INFO L225 Difference]: With dead ends: 53 [2022-04-05 07:41:21,294 INFO L226 Difference]: Without dead ends: 51 [2022-04-05 07:41:21,295 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-04-05 07:41:21,296 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:21,296 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 196 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:41:21,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-05 07:41:21,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-05 07:41:21,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 07:41:21,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-04-05 07:41:21,306 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-04-05 07:41:21,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:21,306 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-04-05 07:41:21,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 07:41:21,307 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-04-05 07:41:21,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 07:41:21,307 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:21,308 INFO L499 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] [2022-04-05 07:41:21,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 07:41:21,532 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 07:41:21,533 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:21,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:21,533 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-04-05 07:41:21,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:21,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817177220] [2022-04-05 07:41:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:21,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:21,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:41:21,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479743953] [2022-04-05 07:41:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:21,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:21,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:21,568 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) [2022-04-05 07:41:21,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 07:41:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:21,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 07:41:21,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:41:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 07:41:21,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:41:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 07:41:21,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:41:21,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817177220] [2022-04-05 07:41:21,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:41:21,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479743953] [2022-04-05 07:41:21,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479743953] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:41:21,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:41:21,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-05 07:41:21,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327106564] [2022-04-05 07:41:21,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:41:21,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 07:41:21,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:41:21,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 07:41:21,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-05 07:41:21,818 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:41:22,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:22,042 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-04-05 07:41:22,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 07:41:22,043 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-05 07:41:22,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:22,044 INFO L225 Difference]: With dead ends: 103 [2022-04-05 07:41:22,044 INFO L226 Difference]: Without dead ends: 96 [2022-04-05 07:41:22,044 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:41:22,045 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 55 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:22,046 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 275 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 07:41:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-05 07:41:22,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-04-05 07:41:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-05 07:41:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-04-05 07:41:22,063 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-04-05 07:41:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:22,064 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-04-05 07:41:22,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:41:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-04-05 07:41:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 07:41:22,065 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:22,065 INFO L499 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] [2022-04-05 07:41:22,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 07:41:22,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:22,280 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:22,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:22,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-04-05 07:41:22,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:22,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897945015] [2022-04-05 07:41:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:22,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:22,293 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:41:22,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088413896] [2022-04-05 07:41:22,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:22,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:22,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:22,297 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) [2022-04-05 07:41:22,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 07:41:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:22,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-05 07:41:22,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:41:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 07:41:22,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:41:22,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:41:22,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897945015] [2022-04-05 07:41:22,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:41:22,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088413896] [2022-04-05 07:41:22,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088413896] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 07:41:22,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:41:22,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-05 07:41:22,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131526834] [2022-04-05 07:41:22,660 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 07:41:22,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 07:41:22,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:41:22,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 07:41:22,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:41:22,661 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 07:41:22,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:22,763 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-04-05 07:41:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 07:41:22,764 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-04-05 07:41:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:22,769 INFO L225 Difference]: With dead ends: 79 [2022-04-05 07:41:22,769 INFO L226 Difference]: Without dead ends: 77 [2022-04-05 07:41:22,770 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-05 07:41:22,771 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 36 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:22,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 177 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:41:22,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-05 07:41:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-04-05 07:41:22,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-05 07:41:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-04-05 07:41:22,786 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-04-05 07:41:22,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:22,787 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-04-05 07:41:22,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 07:41:22,787 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-04-05 07:41:22,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 07:41:22,788 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:22,788 INFO L499 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] [2022-04-05 07:41:22,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 07:41:23,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:23,003 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:23,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:23,004 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-04-05 07:41:23,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:23,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986628839] [2022-04-05 07:41:23,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:23,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:23,016 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:41:23,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285071414] [2022-04-05 07:41:23,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:23,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:23,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:23,017 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) [2022-04-05 07:41:23,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 07:41:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:23,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-05 07:41:23,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:41:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 07:41:23,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:41:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 07:41:23,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:41:23,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986628839] [2022-04-05 07:41:23,450 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:41:23,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285071414] [2022-04-05 07:41:23,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285071414] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:41:23,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:41:23,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2022-04-05 07:41:23,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515714272] [2022-04-05 07:41:23,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:41:23,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-05 07:41:23,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:41:23,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-05 07:41:23,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-04-05 07:41:23,453 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 15 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-05 07:41:23,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:23,683 INFO L93 Difference]: Finished difference Result 102 states and 136 transitions. [2022-04-05 07:41:23,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 07:41:23,683 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 42 [2022-04-05 07:41:23,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:23,684 INFO L225 Difference]: With dead ends: 102 [2022-04-05 07:41:23,684 INFO L226 Difference]: Without dead ends: 64 [2022-04-05 07:41:23,685 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-04-05 07:41:23,686 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 61 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:23,687 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 209 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:41:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-05 07:41:23,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-04-05 07:41:23,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 07:41:23,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-04-05 07:41:23,704 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 42 [2022-04-05 07:41:23,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:23,704 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-04-05 07:41:23,704 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-05 07:41:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-04-05 07:41:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 07:41:23,712 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:23,712 INFO L499 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] [2022-04-05 07:41:23,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 07:41:23,929 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:23,930 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:23,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:23,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-04-05 07:41:23,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:23,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804479802] [2022-04-05 07:41:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:23,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:23,942 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:41:23,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485735227] [2022-04-05 07:41:23,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:23,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:23,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:23,953 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) [2022-04-05 07:41:23,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 07:41:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:23,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:41:23,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:41:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-05 07:41:24,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:41:24,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:41:24,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804479802] [2022-04-05 07:41:24,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:41:24,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485735227] [2022-04-05 07:41:24,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485735227] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:41:24,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:41:24,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:41:24,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489195673] [2022-04-05 07:41:24,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:41:24,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:41:24,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:41:24,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:41:24,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:41:24,089 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 07:41:24,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:24,134 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-04-05 07:41:24,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:41:24,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-04-05 07:41:24,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:24,135 INFO L225 Difference]: With dead ends: 79 [2022-04-05 07:41:24,135 INFO L226 Difference]: Without dead ends: 77 [2022-04-05 07:41:24,136 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:41:24,138 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:24,138 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 152 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:41:24,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-05 07:41:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2022-04-05 07:41:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 07:41:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2022-04-05 07:41:24,153 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 47 [2022-04-05 07:41:24,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:24,153 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2022-04-05 07:41:24,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 07:41:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2022-04-05 07:41:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-05 07:41:24,154 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:24,154 INFO L499 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] [2022-04-05 07:41:24,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 07:41:24,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:24,372 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:24,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:24,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-04-05 07:41:24,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:24,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009628637] [2022-04-05 07:41:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:24,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:24,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:41:24,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766902079] [2022-04-05 07:41:24,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:24,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:24,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:24,390 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) [2022-04-05 07:41:24,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 07:41:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:24,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-05 07:41:24,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:41:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-05 07:41:24,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:41:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-05 07:41:24,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:41:24,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009628637] [2022-04-05 07:41:24,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:41:24,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766902079] [2022-04-05 07:41:24,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766902079] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 07:41:24,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:41:24,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-04-05 07:41:24,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184155588] [2022-04-05 07:41:24,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:41:24,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:41:24,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:41:24,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:41:24,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:41:24,755 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-05 07:41:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:24,863 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2022-04-05 07:41:24,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:41:24,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-04-05 07:41:24,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:24,868 INFO L225 Difference]: With dead ends: 81 [2022-04-05 07:41:24,868 INFO L226 Difference]: Without dead ends: 79 [2022-04-05 07:41:24,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-05 07:41:24,869 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:24,869 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 133 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:41:24,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-05 07:41:24,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-04-05 07:41:24,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 07:41:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2022-04-05 07:41:24,881 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 52 [2022-04-05 07:41:24,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:24,881 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2022-04-05 07:41:24,881 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-05 07:41:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2022-04-05 07:41:24,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-05 07:41:24,882 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:24,882 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:41:24,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 07:41:25,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:25,091 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:25,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:25,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-04-05 07:41:25,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:25,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590220990] [2022-04-05 07:41:25,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:25,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:25,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:41:25,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568107417] [2022-04-05 07:41:25,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:25,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:25,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:25,104 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) [2022-04-05 07:41:25,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 07:41:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:25,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-05 07:41:25,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:41:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 07:41:25,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:41:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 07:41:26,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:41:26,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590220990] [2022-04-05 07:41:26,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:41:26,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568107417] [2022-04-05 07:41:26,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568107417] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:41:26,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:41:26,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2022-04-05 07:41:26,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506151448] [2022-04-05 07:41:26,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:41:26,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-05 07:41:26,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:41:26,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-05 07:41:26,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-04-05 07:41:26,832 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-05 07:41:39,170 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:41:41,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:41:43,239 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:41:43,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:43,475 INFO L93 Difference]: Finished difference Result 280 states and 406 transitions. [2022-04-05 07:41:43,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-05 07:41:43,475 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 64 [2022-04-05 07:41:43,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:43,478 INFO L225 Difference]: With dead ends: 280 [2022-04-05 07:41:43,479 INFO L226 Difference]: Without dead ends: 243 [2022-04-05 07:41:43,480 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=533, Invalid=2659, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 07:41:43,481 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 197 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 287 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 2027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:43,481 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 372 Invalid, 2027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 1737 Invalid, 3 Unknown, 0 Unchecked, 11.3s Time] [2022-04-05 07:41:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-04-05 07:41:43,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 180. [2022-04-05 07:41:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 108 states have (on average 1.25) internal successors, (135), 110 states have internal predecessors, (135), 61 states have call successors, (61), 11 states have call predecessors, (61), 10 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-04-05 07:41:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 254 transitions. [2022-04-05 07:41:43,523 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 254 transitions. Word has length 64 [2022-04-05 07:41:43,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:43,524 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 254 transitions. [2022-04-05 07:41:43,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-05 07:41:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 254 transitions. [2022-04-05 07:41:43,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-05 07:41:43,525 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:43,525 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:41:43,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-05 07:41:43,740 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-05 07:41:43,740 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:43,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:43,741 INFO L85 PathProgramCache]: Analyzing trace with hash 248272623, now seen corresponding path program 2 times [2022-04-05 07:41:43,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:43,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279308146] [2022-04-05 07:41:43,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:43,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:43,751 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:41:43,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633044777] [2022-04-05 07:41:43,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 07:41:43,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:43,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:43,757 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) [2022-04-05 07:41:43,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 07:41:43,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 07:41:43,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:41:43,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:41:43,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:41:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-05 07:41:43,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:41:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-05 07:41:44,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:41:44,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279308146] [2022-04-05 07:41:44,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:41:44,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633044777] [2022-04-05 07:41:44,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633044777] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:41:44,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:41:44,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-05 07:41:44,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339937193] [2022-04-05 07:41:44,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:41:44,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 07:41:44,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:41:44,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 07:41:44,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-04-05 07:41:44,112 INFO L87 Difference]: Start difference. First operand 180 states and 254 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-05 07:41:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:44,462 INFO L93 Difference]: Finished difference Result 286 states and 399 transitions. [2022-04-05 07:41:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 07:41:44,463 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 69 [2022-04-05 07:41:44,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:44,465 INFO L225 Difference]: With dead ends: 286 [2022-04-05 07:41:44,465 INFO L226 Difference]: Without dead ends: 191 [2022-04-05 07:41:44,469 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2022-04-05 07:41:44,469 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 56 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:44,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 241 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 07:41:44,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-04-05 07:41:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 174. [2022-04-05 07:41:44,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 105 states have (on average 1.180952380952381) internal successors, (124), 106 states have internal predecessors, (124), 59 states have call successors, (59), 10 states have call predecessors, (59), 9 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2022-04-05 07:41:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 240 transitions. [2022-04-05 07:41:44,540 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 240 transitions. Word has length 69 [2022-04-05 07:41:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:44,541 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 240 transitions. [2022-04-05 07:41:44,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-05 07:41:44,541 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 240 transitions. [2022-04-05 07:41:44,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-05 07:41:44,543 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:44,543 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:41:44,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 07:41:44,765 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 07:41:44,766 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:44,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:44,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1757299226, now seen corresponding path program 1 times [2022-04-05 07:41:44,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:44,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410405979] [2022-04-05 07:41:44,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:44,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:44,776 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:41:44,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80041573] [2022-04-05 07:41:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:44,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:44,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:44,778 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) [2022-04-05 07:41:44,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 07:41:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:44,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 07:41:44,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:41:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-04-05 07:41:45,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:41:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-05 07:41:45,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:41:45,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410405979] [2022-04-05 07:41:45,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:41:45,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80041573] [2022-04-05 07:41:45,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80041573] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:41:45,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:41:45,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-04-05 07:41:45,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351663870] [2022-04-05 07:41:45,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:41:45,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 07:41:45,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:41:45,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 07:41:45,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:41:45,292 INFO L87 Difference]: Start difference. First operand 174 states and 240 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-05 07:41:45,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:45,523 INFO L93 Difference]: Finished difference Result 242 states and 333 transitions. [2022-04-05 07:41:45,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 07:41:45,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 72 [2022-04-05 07:41:45,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:45,525 INFO L225 Difference]: With dead ends: 242 [2022-04-05 07:41:45,525 INFO L226 Difference]: Without dead ends: 133 [2022-04-05 07:41:45,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-04-05 07:41:45,526 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:45,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 282 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:41:45,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-04-05 07:41:45,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-04-05 07:41:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 80 states have (on average 1.1625) internal successors, (93), 81 states have internal predecessors, (93), 43 states have call successors, (43), 9 states have call predecessors, (43), 8 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-05 07:41:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 177 transitions. [2022-04-05 07:41:45,561 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 177 transitions. Word has length 72 [2022-04-05 07:41:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:45,561 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 177 transitions. [2022-04-05 07:41:45,561 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-05 07:41:45,561 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 177 transitions. [2022-04-05 07:41:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-05 07:41:45,565 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:41:45,565 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:41:45,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 07:41:45,784 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 07:41:45,784 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:41:45,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:41:45,785 INFO L85 PathProgramCache]: Analyzing trace with hash 131640819, now seen corresponding path program 1 times [2022-04-05 07:41:45,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:41:45,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826831974] [2022-04-05 07:41:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:45,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:41:45,794 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:41:45,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068874217] [2022-04-05 07:41:45,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:41:45,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:41:45,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:41:45,801 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) [2022-04-05 07:41:45,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 07:41:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:41:45,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 07:41:45,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:41:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-04-05 07:41:46,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:41:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-04-05 07:41:46,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:41:46,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826831974] [2022-04-05 07:41:46,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:41:46,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068874217] [2022-04-05 07:41:46,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068874217] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:41:46,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:41:46,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-05 07:41:46,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103806100] [2022-04-05 07:41:46,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:41:46,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 07:41:46,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:41:46,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 07:41:46,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-05 07:41:46,481 INFO L87 Difference]: Start difference. First operand 132 states and 177 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-05 07:41:46,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:41:46,706 INFO L93 Difference]: Finished difference Result 144 states and 186 transitions. [2022-04-05 07:41:46,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 07:41:46,707 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 86 [2022-04-05 07:41:46,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:41:46,707 INFO L225 Difference]: With dead ends: 144 [2022-04-05 07:41:46,707 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 07:41:46,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-04-05 07:41:46,709 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 26 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 07:41:46,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 228 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 07:41:46,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 07:41:46,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 07:41:46,709 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) [2022-04-05 07:41:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 07:41:46,710 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2022-04-05 07:41:46,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:41:46,710 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 07:41:46,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-05 07:41:46,710 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 07:41:46,710 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 07:41:46,712 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 07:41:46,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 07:41:46,913 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-05 07:41:46,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-05 07:41:47,915 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-05 07:41:47,915 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-05 07:41:47,915 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-05 07:41:47,915 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-05 07:41:47,915 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-05 07:41:47,915 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-05 07:41:47,915 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-05 07:41:47,915 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2022-04-05 07:41:47,915 INFO L882 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2022-04-05 07:41:47,915 INFO L882 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2022-04-05 07:41:47,916 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2022-04-05 07:41:47,916 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 18 76) the Hoare annotation is: true [2022-04-05 07:41:47,916 INFO L885 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-04-05 07:41:47,916 INFO L882 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-04-05 07:41:47,916 INFO L878 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 1)) [2022-04-05 07:41:47,916 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 0 main_~x~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2022-04-05 07:41:47,916 INFO L878 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 1 main_~x~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2022-04-05 07:41:47,916 INFO L882 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2022-04-05 07:41:47,916 INFO L878 garLoopResultBuilder]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 1))) (or (and (= main_~s~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= main_~x~0 1) (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) .cse0 (= main_~p~0 1)) (and (< main_~b~0 1) (= main_~p~0 0) (< (div main_~x~0 2) main_~a~0) (= main_~r~0 1) (= main_~a~0 main_~y~0) (<= main_~a~0 main_~x~0) (<= main_~b~0 main_~c~0) (<= 0 main_~b~0) (= main_~q~0 1) (<= main_~c~0 main_~b~0) (= (+ main_~s~0 1) 0) .cse0))) [2022-04-05 07:41:47,916 INFO L878 garLoopResultBuilder]: At program point L35-3(lines 35 73) the Hoare annotation is: (and (<= 1 main_~x~0) (= main_~b~0 0) (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= main_~b~0 main_~c~0) (<= 1 main_~y~0) (<= main_~y~0 1)) [2022-04-05 07:41:47,917 INFO L882 garLoopResultBuilder]: For program point L36(lines 36 37) no Hoare annotation was computed. [2022-04-05 07:41:47,917 INFO L882 garLoopResultBuilder]: For program point L74(line 74) no Hoare annotation was computed. [2022-04-05 07:41:47,917 INFO L878 garLoopResultBuilder]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse0 (= main_~s~0 1)) (.cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse2 (<= 1 main_~a~0)) (.cse3 (= main_~b~0 main_~y~0)) (.cse4 (= main_~q~0 0)) (.cse5 (= main_~a~0 main_~x~0)) (.cse6 (<= main_~y~0 1)) (.cse7 (= main_~p~0 1))) (or (and (= main_~v~0 (* main_~d~0 main_~b~0)) (<= main_~v~0 main_~b~0) (< main_~c~0 (* main_~v~0 2)) .cse0 .cse1 .cse2 (<= 0 main_~c~0) .cse3 (= main_~k~0 1) (< (div main_~x~0 2) main_~b~0) .cse4 (< main_~c~0 main_~b~0) .cse5 .cse6 .cse7) (and (= main_~k~0 0) .cse0 .cse1 .cse2 .cse3 .cse4 (<= 1 main_~y~0) .cse5 (<= main_~c~0 1) (= main_~c~0 main_~x~0) .cse6 .cse7))) [2022-04-05 07:41:47,917 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 18 76) no Hoare annotation was computed. [2022-04-05 07:41:47,917 INFO L882 garLoopResultBuilder]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2022-04-05 07:41:47,917 INFO L882 garLoopResultBuilder]: For program point L43(lines 43 44) no Hoare annotation was computed. [2022-04-05 07:41:47,917 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 18 76) no Hoare annotation was computed. [2022-04-05 07:41:47,917 INFO L878 garLoopResultBuilder]: At program point L49-2(lines 49 59) the Hoare annotation is: (and (= main_~k~0 0) (<= main_~v~0 main_~c~0) (= main_~s~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (= main_~b~0 main_~y~0) (<= main_~b~0 main_~v~0) (= main_~d~0 1) (= main_~q~0 0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~c~0 1) (= main_~c~0 main_~x~0) (= main_~p~0 1)) [2022-04-05 07:41:47,917 INFO L882 garLoopResultBuilder]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2022-04-05 07:41:47,917 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (and (= main_~k~0 0) (<= main_~v~0 main_~c~0) (= main_~s~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (= main_~b~0 main_~y~0) (<= main_~b~0 main_~v~0) (= main_~d~0 1) (= main_~q~0 0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~c~0 1) (= main_~c~0 main_~x~0) (= main_~p~0 1)) [2022-04-05 07:41:47,917 INFO L878 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (and (= main_~k~0 0) (<= main_~v~0 main_~c~0) (= main_~s~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (= main_~b~0 main_~y~0) (<= main_~b~0 main_~v~0) (= main_~d~0 1) (= main_~q~0 0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~c~0 1) (= main_~c~0 main_~x~0) (= main_~p~0 1)) [2022-04-05 07:41:47,918 INFO L878 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (and (= main_~k~0 0) (<= main_~v~0 main_~c~0) (= main_~s~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (= main_~b~0 main_~y~0) (<= main_~b~0 main_~v~0) (= main_~d~0 1) (= main_~q~0 0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~c~0 1) (= main_~c~0 main_~x~0) (= main_~p~0 1)) [2022-04-05 07:41:47,918 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (= main_~k~0 0) (<= main_~v~0 main_~c~0) (= main_~s~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (= main_~b~0 main_~y~0) (<= main_~b~0 main_~v~0) (= main_~d~0 1) (= main_~q~0 0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~c~0 1) (= main_~c~0 main_~x~0) (= main_~p~0 1)) [2022-04-05 07:41:47,918 INFO L882 garLoopResultBuilder]: For program point L53(lines 49 59) no Hoare annotation was computed. [2022-04-05 07:41:47,918 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2022-04-05 07:41:47,918 INFO L882 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2022-04-05 07:41:47,918 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2022-04-05 07:41:47,918 INFO L882 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2022-04-05 07:41:47,918 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2022-04-05 07:41:47,918 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2022-04-05 07:41:47,921 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:41:47,922 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 07:41:47,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 07:41:47 BasicIcfg [2022-04-05 07:41:47,935 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 07:41:47,936 INFO L158 Benchmark]: Toolchain (without parser) took 29093.45ms. Allocated memory was 180.4MB in the beginning and 264.2MB in the end (delta: 83.9MB). Free memory was 129.0MB in the beginning and 224.6MB in the end (delta: -95.6MB). Peak memory consumption was 125.5MB. Max. memory is 8.0GB. [2022-04-05 07:41:47,936 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 180.4MB. Free memory was 145.3MB in the beginning and 145.3MB in the end (delta: 73.1kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 07:41:47,936 INFO L158 Benchmark]: CACSL2BoogieTranslator took 227.29ms. Allocated memory is still 180.4MB. Free memory was 128.8MB in the beginning and 155.8MB in the end (delta: -27.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-05 07:41:47,936 INFO L158 Benchmark]: Boogie Preprocessor took 23.25ms. Allocated memory is still 180.4MB. Free memory was 155.8MB in the beginning and 154.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 07:41:47,937 INFO L158 Benchmark]: RCFGBuilder took 317.22ms. Allocated memory is still 180.4MB. Free memory was 154.5MB in the beginning and 142.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-05 07:41:47,937 INFO L158 Benchmark]: IcfgTransformer took 20.77ms. Allocated memory is still 180.4MB. Free memory was 142.9MB in the beginning and 141.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 07:41:47,937 INFO L158 Benchmark]: TraceAbstraction took 28496.31ms. Allocated memory was 180.4MB in the beginning and 264.2MB in the end (delta: 83.9MB). Free memory was 141.1MB in the beginning and 224.6MB in the end (delta: -83.5MB). Peak memory consumption was 137.6MB. Max. memory is 8.0GB. [2022-04-05 07:41:47,939 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 180.4MB. Free memory was 145.3MB in the beginning and 145.3MB in the end (delta: 73.1kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 227.29ms. Allocated memory is still 180.4MB. Free memory was 128.8MB in the beginning and 155.8MB in the end (delta: -27.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.25ms. Allocated memory is still 180.4MB. Free memory was 155.8MB in the beginning and 154.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 317.22ms. Allocated memory is still 180.4MB. Free memory was 154.5MB in the beginning and 142.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 20.77ms. Allocated memory is still 180.4MB. Free memory was 142.9MB in the beginning and 141.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 28496.31ms. Allocated memory was 180.4MB in the beginning and 264.2MB in the end (delta: 83.9MB). Free memory was 141.1MB in the beginning and 224.6MB in the end (delta: -83.5MB). Peak memory consumption was 137.6MB. 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: 13]: 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 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 28.4s, OverallIterations: 12, TraceHistogramMax: 9, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 18.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 610 SdHoareTripleChecker+Valid, 12.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 559 mSDsluCounter, 2441 SdHoareTripleChecker+Invalid, 12.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1915 mSDsCounter, 587 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3228 IncrementalHoareTripleChecker+Invalid, 3818 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 587 mSolverCounterUnsat, 526 mSDtfsCounter, 3228 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1132 GetRequests, 935 SyntacticMatches, 7 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=180occurred in iteration=9, InterpolantAutomatonStates: 131, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 131 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 151 PreInvPairs, 170 NumberOfFragments, 489 HoareAnnotationTreeSize, 151 FomulaSimplifications, 36 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 18 FomulaSimplificationsInter, 2652 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 617 NumberOfCodeBlocks, 617 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 1058 ConstructedInterpolants, 0 QuantifiedInterpolants, 3872 SizeOfPredicates, 53 NumberOfNonLiveVariables, 1688 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 968/1098 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((((((k == 0 && v <= c) && s == 1) && a == y * r + p * x) && b == y) && b <= v) && d == 1) && q == 0) && 1 <= y) && a == x) && c <= 1) && c == x) && p == 1 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((((((s == 1 && a == y * r + p * x) && x <= 1) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && y <= 1) && p == 1) || (((((((((((b < 1 && p == 0) && x / 2 < a) && r == 1) && a == y) && a <= x) && b <= c) && 0 <= b) && q == 1) && c <= b) && s + 1 == 0) && y <= 1) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((((((((v == d * b && v <= b) && c < v * 2) && s == 1) && a == y * r + p * x) && 1 <= a) && 0 <= c) && b == y) && k == 1) && x / 2 < b) && q == 0) && c < b) && a == x) && y <= 1) && p == 1) || (((((((((((k == 0 && s == 1) && a == y * r + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && c <= 1) && c == x) && y <= 1) && p == 1) RESULT: Ultimate proved your program to be correct! [2022-04-05 07:41:47,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...