/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/egcd2-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 11:50:31,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 11:50:31,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 11:50:31,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 11:50:31,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 11:50:31,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 11:50:31,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 11:50:31,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 11:50:31,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 11:50:31,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 11:50:31,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 11:50:31,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 11:50:31,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 11:50:31,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 11:50:31,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 11:50:31,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 11:50:31,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 11:50:31,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 11:50:31,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 11:50:31,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 11:50:31,863 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 11:50:31,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 11:50:31,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 11:50:31,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 11:50:31,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 11:50:31,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 11:50:31,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 11:50:31,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 11:50:31,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 11:50:31,879 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 11:50:31,897 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 11:50:31,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 11:50:31,898 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 11:50:31,898 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 11:50:31,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 11:50:31,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 11:50:31,899 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 11:50:31,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 11:50:31,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 11:50:31,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 11:50:31,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 11:50:31,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 11:50:31,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 11:50:31,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 11:50:31,900 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 11:50:31,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 11:50:31,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 11:50:31,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 11:50:31,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 11:50:31,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:50:31,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 11:50:31,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 11:50:31,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 11:50:31,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 11:50:31,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 11:50:31,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 11:50:31,902 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 11:50:31,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 11:50:31,902 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 11:50:31,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 11:50:32,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 11:50:32,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 11:50:32,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 11:50:32,092 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 11:50:32,093 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 11:50:32,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound2.c [2022-04-06 11:50:32,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee142cdb7/5f769c135ec148d19327efecd81ba3c1/FLAG7ebd98209 [2022-04-06 11:50:32,502 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 11:50:32,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound2.c [2022-04-06 11:50:32,506 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee142cdb7/5f769c135ec148d19327efecd81ba3c1/FLAG7ebd98209 [2022-04-06 11:50:32,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee142cdb7/5f769c135ec148d19327efecd81ba3c1 [2022-04-06 11:50:32,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 11:50:32,517 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 11:50:32,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 11:50:32,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 11:50:32,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 11:50:32,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:50:32" (1/1) ... [2022-04-06 11:50:32,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e0e99d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:50:32, skipping insertion in model container [2022-04-06 11:50:32,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:50:32" (1/1) ... [2022-04-06 11:50:32,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 11:50:32,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 11:50:32,684 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/egcd2-ll_valuebound2.c[490,503] [2022-04-06 11:50:32,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:50:32,702 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 11:50:32,709 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/egcd2-ll_valuebound2.c[490,503] [2022-04-06 11:50:32,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:50:32,723 INFO L208 MainTranslator]: Completed translation [2022-04-06 11:50:32,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:50:32 WrapperNode [2022-04-06 11:50:32,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 11:50:32,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 11:50:32,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 11:50:32,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 11:50:32,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:50:32" (1/1) ... [2022-04-06 11:50:32,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:50:32" (1/1) ... [2022-04-06 11:50:32,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:50:32" (1/1) ... [2022-04-06 11:50:32,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:50:32" (1/1) ... [2022-04-06 11:50:32,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:50:32" (1/1) ... [2022-04-06 11:50:32,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:50:32" (1/1) ... [2022-04-06 11:50:32,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:50:32" (1/1) ... [2022-04-06 11:50:32,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 11:50:32,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 11:50:32,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 11:50:32,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 11:50:32,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:50:32" (1/1) ... [2022-04-06 11:50:32,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:50:32,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:32,790 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) [2022-04-06 11:50:32,799 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 [2022-04-06 11:50:32,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 11:50:32,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 11:50:32,816 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 11:50:32,816 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 11:50:32,816 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 11:50:32,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 11:50:32,817 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 11:50:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 11:50:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 11:50:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 11:50:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 11:50:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 11:50:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 11:50:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 11:50:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 11:50:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 11:50:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 11:50:32,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 11:50:32,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 11:50:32,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 11:50:32,860 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 11:50:32,862 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 11:50:32,962 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 11:50:32,966 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 11:50:32,966 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 11:50:32,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:50:32 BoogieIcfgContainer [2022-04-06 11:50:32,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 11:50:32,968 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 11:50:32,968 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 11:50:32,969 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 11:50:32,971 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:50:32" (1/1) ... [2022-04-06 11:50:32,972 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 11:50:32,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:50:32 BasicIcfg [2022-04-06 11:50:32,984 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 11:50:32,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 11:50:32,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 11:50:32,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 11:50:32,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:50:32" (1/4) ... [2022-04-06 11:50:32,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1511bf00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:50:32, skipping insertion in model container [2022-04-06 11:50:32,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:50:32" (2/4) ... [2022-04-06 11:50:32,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1511bf00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:50:32, skipping insertion in model container [2022-04-06 11:50:32,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:50:32" (3/4) ... [2022-04-06 11:50:32,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1511bf00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:50:32, skipping insertion in model container [2022-04-06 11:50:32,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:50:32" (4/4) ... [2022-04-06 11:50:32,989 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound2.cqvasr [2022-04-06 11:50:32,993 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 11:50:32,993 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 11:50:33,021 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 11:50:33,025 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 [2022-04-06 11:50:33,025 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 11:50:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 11:50:33,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 11:50:33,040 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:33,040 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:50:33,041 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:33,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:33,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2022-04-06 11:50:33,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:33,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219369163] [2022-04-06 11:50:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:33,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:50:33,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 11:50:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:50:33,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 11:50:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:50:33,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 11:50:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:50:33,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 11:50:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:50:33,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 11:50:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:50:33,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 11:50:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:50:33,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 11:50:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:50:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 11:50:33,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:33,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219369163] [2022-04-06 11:50:33,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219369163] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:50:33,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:50:33,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 11:50:33,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945896026] [2022-04-06 11:50:33,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:50:33,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 11:50:33,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:33,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 11:50:33,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:50:33,356 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 11:50:33,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:33,422 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-04-06 11:50:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 11:50:33,424 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-04-06 11:50:33,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:33,429 INFO L225 Difference]: With dead ends: 73 [2022-04-06 11:50:33,429 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 11:50:33,431 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:50:33,434 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:33,435 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:50:33,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 11:50:33,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 11:50:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 11:50:33,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-04-06 11:50:33,481 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-04-06 11:50:33,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:33,481 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-04-06 11:50:33,482 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 11:50:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-04-06 11:50:33,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 11:50:33,484 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:33,484 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:50:33,486 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 11:50:33,486 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:33,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:33,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2022-04-06 11:50:33,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:33,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257299167] [2022-04-06 11:50:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:33,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:33,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:50:33,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395887377] [2022-04-06 11:50:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:33,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:33,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:33,525 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) [2022-04-06 11:50:33,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 11:50:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:50:33,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:50:33,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:50:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 11:50:33,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:50:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 11:50:33,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:33,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257299167] [2022-04-06 11:50:33,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:50:33,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395887377] [2022-04-06 11:50:33,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395887377] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:50:33,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:50:33,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-04-06 11:50:33,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265400687] [2022-04-06 11:50:33,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:50:33,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 11:50:33,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:33,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 11:50:33,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 11:50:33,943 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 11:50:34,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:34,032 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-04-06 11:50:34,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:50:34,032 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-04-06 11:50:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:34,033 INFO L225 Difference]: With dead ends: 52 [2022-04-06 11:50:34,034 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 11:50:34,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 11:50:34,035 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:34,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 152 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:50:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 11:50:34,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-04-06 11:50:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 11:50:34,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-04-06 11:50:34,041 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-04-06 11:50:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:34,042 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-04-06 11:50:34,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 11:50:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-04-06 11:50:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 11:50:34,043 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:34,043 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:50:34,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 11:50:34,259 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 [2022-04-06 11:50:34,260 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:34,260 INFO L85 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2022-04-06 11:50:34,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:34,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048624893] [2022-04-06 11:50:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:34,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:34,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:50:34,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012977903] [2022-04-06 11:50:34,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:34,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:34,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:34,288 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) [2022-04-06 11:50:34,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 11:50:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:50:34,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 11:50:34,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:50:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 11:50:34,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:50:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 11:50:34,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:34,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048624893] [2022-04-06 11:50:34,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:50:34,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012977903] [2022-04-06 11:50:34,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012977903] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 11:50:34,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:50:34,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-06 11:50:34,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289618950] [2022-04-06 11:50:34,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:50:34,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:50:34,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:34,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:50:34,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:50:34,547 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 11:50:34,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:34,583 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-04-06 11:50:34,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:50:34,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-04-06 11:50:34,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:34,585 INFO L225 Difference]: With dead ends: 43 [2022-04-06 11:50:34,585 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 11:50:34,585 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:50:34,586 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:34,586 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 137 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:50:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 11:50:34,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-04-06 11:50:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 11:50:34,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-04-06 11:50:34,592 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2022-04-06 11:50:34,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:34,592 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-04-06 11:50:34,592 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 11:50:34,593 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-04-06 11:50:34,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 11:50:34,593 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:34,593 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:50:34,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 11:50:34,812 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 [2022-04-06 11:50:34,813 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:34,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:34,813 INFO L85 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2022-04-06 11:50:34,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:34,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582020739] [2022-04-06 11:50:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:34,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:34,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:50:34,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060068128] [2022-04-06 11:50:34,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:34,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:34,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:34,828 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) [2022-04-06 11:50:34,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 11:50:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:50:34,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 11:50:34,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:50:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 11:50:35,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:50:35,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:35,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582020739] [2022-04-06 11:50:35,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:50:35,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060068128] [2022-04-06 11:50:35,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060068128] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:50:35,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:50:35,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 11:50:35,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999363031] [2022-04-06 11:50:35,083 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:50:35,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 11:50:35,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:35,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 11:50:35,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:50:35,085 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 11:50:35,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:35,203 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-04-06 11:50:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 11:50:35,204 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-04-06 11:50:35,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:35,204 INFO L225 Difference]: With dead ends: 54 [2022-04-06 11:50:35,204 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 11:50:35,205 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:50:35,205 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:35,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 168 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:50:35,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 11:50:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-04-06 11:50:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 11:50:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-04-06 11:50:35,212 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2022-04-06 11:50:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:35,212 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-04-06 11:50:35,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 11:50:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-04-06 11:50:35,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 11:50:35,213 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:35,213 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:50:35,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 11:50:35,427 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 [2022-04-06 11:50:35,428 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:35,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:35,428 INFO L85 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2022-04-06 11:50:35,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:35,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848824096] [2022-04-06 11:50:35,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:35,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:35,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:50:35,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016544288] [2022-04-06 11:50:35,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:35,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:35,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:35,438 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) [2022-04-06 11:50:35,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 11:50:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:50:35,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 11:50:35,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:50:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 11:50:35,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:50:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 11:50:35,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:35,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848824096] [2022-04-06 11:50:35,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:50:35,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016544288] [2022-04-06 11:50:35,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016544288] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 11:50:35,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:50:35,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 13 [2022-04-06 11:50:35,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241973333] [2022-04-06 11:50:35,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:50:35,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 11:50:35,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:35,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 11:50:35,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-04-06 11:50:35,986 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 11:50:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:36,044 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-04-06 11:50:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:50:36,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2022-04-06 11:50:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:36,046 INFO L225 Difference]: With dead ends: 58 [2022-04-06 11:50:36,046 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 11:50:36,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:50:36,047 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 12 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:36,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 146 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:50:36,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 11:50:36,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-04-06 11:50:36,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 11:50:36,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-04-06 11:50:36,053 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2022-04-06 11:50:36,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:36,054 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-04-06 11:50:36,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 11:50:36,054 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-04-06 11:50:36,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 11:50:36,055 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:36,055 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:50:36,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 11:50:36,267 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 [2022-04-06 11:50:36,269 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:36,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2022-04-06 11:50:36,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:36,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129785716] [2022-04-06 11:50:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:36,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:36,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:50:36,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841527821] [2022-04-06 11:50:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:36,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:36,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:36,290 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) [2022-04-06 11:50:36,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 11:50:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:50:36,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 11:50:36,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:50:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 11:50:36,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:50:36,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:36,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129785716] [2022-04-06 11:50:36,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:50:36,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841527821] [2022-04-06 11:50:36,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841527821] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:50:36,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:50:36,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 11:50:36,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563076983] [2022-04-06 11:50:36,565 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:50:36,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 11:50:36,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 11:50:36,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 11:50:36,566 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-06 11:50:36,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:36,649 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-04-06 11:50:36,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 11:50:36,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-04-06 11:50:36,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:36,650 INFO L225 Difference]: With dead ends: 62 [2022-04-06 11:50:36,650 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 11:50:36,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:50:36,651 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:36,651 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 138 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:50:36,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 11:50:36,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-04-06 11:50:36,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 11:50:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-04-06 11:50:36,657 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2022-04-06 11:50:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:36,657 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-04-06 11:50:36,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-06 11:50:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-04-06 11:50:36,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 11:50:36,658 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:36,658 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:50:36,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-06 11:50:36,871 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 [2022-04-06 11:50:36,872 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:36,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:36,872 INFO L85 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2022-04-06 11:50:36,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:36,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552664677] [2022-04-06 11:50:36,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:36,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:36,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:50:36,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071241094] [2022-04-06 11:50:36,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:36,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:36,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:36,882 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) [2022-04-06 11:50:36,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 11:50:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:50:36,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 11:50:36,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:50:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 11:50:37,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:50:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 11:50:37,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:37,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552664677] [2022-04-06 11:50:37,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:50:37,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071241094] [2022-04-06 11:50:37,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071241094] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:50:37,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:50:37,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 11:50:37,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688307206] [2022-04-06 11:50:37,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:50:37,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 11:50:37,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:37,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 11:50:37,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 11:50:37,157 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 11:50:37,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:37,311 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-04-06 11:50:37,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 11:50:37,312 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-04-06 11:50:37,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:37,313 INFO L225 Difference]: With dead ends: 106 [2022-04-06 11:50:37,313 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 11:50:37,313 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:50:37,313 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 32 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:37,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 259 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:50:37,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 11:50:37,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-04-06 11:50:37,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 11:50:37,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-04-06 11:50:37,324 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-04-06 11:50:37,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:37,324 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-04-06 11:50:37,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 11:50:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-04-06 11:50:37,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 11:50:37,325 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:37,326 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:50:37,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 11:50:37,542 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 [2022-04-06 11:50:37,543 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:37,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:37,543 INFO L85 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2022-04-06 11:50:37,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:37,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510289845] [2022-04-06 11:50:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:37,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:37,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:50:37,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503704338] [2022-04-06 11:50:37,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:37,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:37,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:37,553 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) [2022-04-06 11:50:37,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 11:50:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:50:37,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 11:50:37,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:50:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 11:50:37,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:50:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 11:50:37,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:37,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510289845] [2022-04-06 11:50:37,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:50:37,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503704338] [2022-04-06 11:50:37,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503704338] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:50:37,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:50:37,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-06 11:50:37,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70695870] [2022-04-06 11:50:37,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:50:37,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 11:50:37,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:37,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 11:50:37,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-04-06 11:50:37,941 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 11:50:38,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:38,151 INFO L93 Difference]: Finished difference Result 132 states and 187 transitions. [2022-04-06 11:50:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 11:50:38,152 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2022-04-06 11:50:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:38,154 INFO L225 Difference]: With dead ends: 132 [2022-04-06 11:50:38,154 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 11:50:38,155 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-04-06 11:50:38,155 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 33 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:38,156 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 207 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:50:38,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 11:50:38,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2022-04-06 11:50:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 11:50:38,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-04-06 11:50:38,171 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2022-04-06 11:50:38,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:38,172 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-04-06 11:50:38,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 11:50:38,172 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-04-06 11:50:38,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 11:50:38,173 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:38,173 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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] [2022-04-06 11:50:38,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 11:50:38,389 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 [2022-04-06 11:50:38,390 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:38,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:38,390 INFO L85 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2022-04-06 11:50:38,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:38,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669989978] [2022-04-06 11:50:38,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:38,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:38,398 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:50:38,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119717470] [2022-04-06 11:50:38,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:50:38,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:38,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:38,404 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) [2022-04-06 11:50:38,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 11:50:38,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:50:38,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:50:38,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 11:50:38,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:50:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-04-06 11:50:38,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:50:39,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:39,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669989978] [2022-04-06 11:50:39,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:50:39,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119717470] [2022-04-06 11:50:39,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119717470] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:50:39,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:50:39,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-06 11:50:39,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489163098] [2022-04-06 11:50:39,024 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:50:39,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 11:50:39,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:39,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 11:50:39,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-04-06 11:50:39,025 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 11:50:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:39,275 INFO L93 Difference]: Finished difference Result 128 states and 169 transitions. [2022-04-06 11:50:39,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 11:50:39,275 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 80 [2022-04-06 11:50:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:39,276 INFO L225 Difference]: With dead ends: 128 [2022-04-06 11:50:39,276 INFO L226 Difference]: Without dead ends: 126 [2022-04-06 11:50:39,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-04-06 11:50:39,277 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 35 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:39,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 217 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:50:39,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-04-06 11:50:39,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2022-04-06 11:50:39,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 67 states have (on average 1.164179104477612) internal successors, (78), 69 states have internal predecessors, (78), 44 states have call successors, (44), 12 states have call predecessors, (44), 11 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-06 11:50:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 164 transitions. [2022-04-06 11:50:39,292 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 164 transitions. Word has length 80 [2022-04-06 11:50:39,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:39,292 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 164 transitions. [2022-04-06 11:50:39,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 11:50:39,293 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 164 transitions. [2022-04-06 11:50:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 11:50:39,293 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:39,294 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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] [2022-04-06 11:50:39,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 11:50:39,510 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 [2022-04-06 11:50:39,511 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:39,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:39,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2022-04-06 11:50:39,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:39,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693185412] [2022-04-06 11:50:39,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:39,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:39,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:50:39,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647248642] [2022-04-06 11:50:39,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 11:50:39,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:39,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:39,521 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) [2022-04-06 11:50:39,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 11:50:39,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 11:50:39,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:50:39,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 11:50:39,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:50:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 11:50:39,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:50:40,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:40,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693185412] [2022-04-06 11:50:40,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:50:40,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647248642] [2022-04-06 11:50:40,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647248642] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:50:40,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:50:40,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-06 11:50:40,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028033188] [2022-04-06 11:50:40,001 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:50:40,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 11:50:40,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:40,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 11:50:40,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:50:40,002 INFO L87 Difference]: Start difference. First operand 123 states and 164 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 11:50:40,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:40,170 INFO L93 Difference]: Finished difference Result 132 states and 172 transitions. [2022-04-06 11:50:40,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 11:50:40,170 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-04-06 11:50:40,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:40,171 INFO L225 Difference]: With dead ends: 132 [2022-04-06 11:50:40,171 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 11:50:40,172 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:50:40,172 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 19 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:40,172 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 208 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:50:40,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 11:50:40,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2022-04-06 11:50:40,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 72 states have internal predecessors, (81), 44 states have call successors, (44), 13 states have call predecessors, (44), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-06 11:50:40,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 167 transitions. [2022-04-06 11:50:40,183 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 167 transitions. Word has length 85 [2022-04-06 11:50:40,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:40,184 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 167 transitions. [2022-04-06 11:50:40,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 11:50:40,184 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 167 transitions. [2022-04-06 11:50:40,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 11:50:40,184 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:40,185 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:50:40,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 11:50:40,401 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 [2022-04-06 11:50:40,402 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:40,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:40,402 INFO L85 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2022-04-06 11:50:40,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:40,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455716696] [2022-04-06 11:50:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:40,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:40,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:50:40,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597047353] [2022-04-06 11:50:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:40,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:40,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:40,411 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) [2022-04-06 11:50:40,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 11:50:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:50:40,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 11:50:40,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:50:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 11:50:40,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:50:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 11:50:41,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:41,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455716696] [2022-04-06 11:50:41,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:50:41,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597047353] [2022-04-06 11:50:41,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597047353] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:50:41,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:50:41,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 11:50:41,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655906099] [2022-04-06 11:50:41,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:50:41,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 11:50:41,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:41,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 11:50:41,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:50:41,152 INFO L87 Difference]: Start difference. First operand 127 states and 167 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-06 11:50:43,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:43,085 INFO L93 Difference]: Finished difference Result 212 states and 299 transitions. [2022-04-06 11:50:43,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 11:50:43,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 91 [2022-04-06 11:50:43,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:43,089 INFO L225 Difference]: With dead ends: 212 [2022-04-06 11:50:43,089 INFO L226 Difference]: Without dead ends: 208 [2022-04-06 11:50:43,090 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-04-06 11:50:43,090 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 49 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:43,090 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 389 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 11:50:43,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-04-06 11:50:43,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2022-04-06 11:50:43,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 107 states have (on average 1.1962616822429906) internal successors, (128), 108 states have internal predecessors, (128), 81 states have call successors, (81), 16 states have call predecessors, (81), 15 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-04-06 11:50:43,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 288 transitions. [2022-04-06 11:50:43,119 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 288 transitions. Word has length 91 [2022-04-06 11:50:43,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:43,119 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 288 transitions. [2022-04-06 11:50:43,120 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-06 11:50:43,120 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 288 transitions. [2022-04-06 11:50:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 11:50:43,120 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:43,120 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-04-06 11:50:43,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 11:50:43,337 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 [2022-04-06 11:50:43,338 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:43,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:43,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1452951817, now seen corresponding path program 4 times [2022-04-06 11:50:43,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:43,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177062339] [2022-04-06 11:50:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:43,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:43,351 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:50:43,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277262066] [2022-04-06 11:50:43,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 11:50:43,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:43,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:43,353 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) [2022-04-06 11:50:43,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 11:50:43,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 11:50:43,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:50:43,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 11:50:43,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:50:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 11:50:43,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:50:43,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:43,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177062339] [2022-04-06 11:50:43,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:50:43,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277262066] [2022-04-06 11:50:43,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277262066] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:50:43,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:50:43,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:50:43,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255431101] [2022-04-06 11:50:43,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:50:43,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:50:43,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:43,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:50:43,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:50:43,527 INFO L87 Difference]: Start difference. First operand 204 states and 288 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-04-06 11:50:43,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:43,617 INFO L93 Difference]: Finished difference Result 257 states and 360 transitions. [2022-04-06 11:50:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:50:43,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 105 [2022-04-06 11:50:43,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:43,619 INFO L225 Difference]: With dead ends: 257 [2022-04-06 11:50:43,619 INFO L226 Difference]: Without dead ends: 185 [2022-04-06 11:50:43,622 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 11:50:43,634 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:43,635 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 161 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:50:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-04-06 11:50:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 171. [2022-04-06 11:50:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 91 states have internal predecessors, (103), 65 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-04-06 11:50:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 231 transitions. [2022-04-06 11:50:43,675 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 231 transitions. Word has length 105 [2022-04-06 11:50:43,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:43,676 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 231 transitions. [2022-04-06 11:50:43,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-04-06 11:50:43,676 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 231 transitions. [2022-04-06 11:50:43,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 11:50:43,677 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:43,677 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:50:43,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-04-06 11:50:43,891 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 [2022-04-06 11:50:43,892 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:43,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:43,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2022-04-06 11:50:43,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:43,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871114457] [2022-04-06 11:50:43,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:43,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:43,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:50:43,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140235389] [2022-04-06 11:50:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:43,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:43,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:43,900 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:50:43,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 11:50:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:50:43,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 11:50:43,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:50:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 122 proven. 23 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-04-06 11:50:44,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:50:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 32 proven. 23 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-04-06 11:50:44,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:44,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871114457] [2022-04-06 11:50:44,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:50:44,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140235389] [2022-04-06 11:50:44,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140235389] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:50:44,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:50:44,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2022-04-06 11:50:44,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705380036] [2022-04-06 11:50:44,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:50:44,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 11:50:44,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:44,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 11:50:44,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-04-06 11:50:44,390 INFO L87 Difference]: Start difference. First operand 171 states and 231 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-04-06 11:50:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:44,702 INFO L93 Difference]: Finished difference Result 215 states and 287 transitions. [2022-04-06 11:50:44,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 11:50:44,703 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 107 [2022-04-06 11:50:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:44,704 INFO L225 Difference]: With dead ends: 215 [2022-04-06 11:50:44,705 INFO L226 Difference]: Without dead ends: 144 [2022-04-06 11:50:44,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 200 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2022-04-06 11:50:44,706 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 50 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:44,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 296 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:50:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-06 11:50:44,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2022-04-06 11:50:44,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 75 states have (on average 1.12) internal successors, (84), 76 states have internal predecessors, (84), 53 states have call successors, (53), 14 states have call predecessors, (53), 13 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-06 11:50:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 188 transitions. [2022-04-06 11:50:44,726 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 188 transitions. Word has length 107 [2022-04-06 11:50:44,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:44,727 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 188 transitions. [2022-04-06 11:50:44,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-04-06 11:50:44,728 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 188 transitions. [2022-04-06 11:50:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 11:50:44,730 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:44,730 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:50:44,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-06 11:50:44,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 11:50:44,943 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:44,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:44,944 INFO L85 PathProgramCache]: Analyzing trace with hash 259955901, now seen corresponding path program 2 times [2022-04-06 11:50:44,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:44,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206408258] [2022-04-06 11:50:44,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:44,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:44,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:50:44,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515113914] [2022-04-06 11:50:44,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:50:44,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:44,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:44,953 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:50:44,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 11:50:45,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:50:45,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:50:45,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 11:50:45,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:50:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 154 proven. 18 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2022-04-06 11:50:45,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:50:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 48 proven. 32 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2022-04-06 11:50:45,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:45,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206408258] [2022-04-06 11:50:45,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:50:45,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515113914] [2022-04-06 11:50:45,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515113914] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:50:45,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:50:45,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 11:50:45,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548389190] [2022-04-06 11:50:45,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:50:45,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 11:50:45,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:45,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 11:50:45,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-04-06 11:50:45,519 INFO L87 Difference]: Start difference. First operand 142 states and 188 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-04-06 11:50:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:45,850 INFO L93 Difference]: Finished difference Result 185 states and 244 transitions. [2022-04-06 11:50:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 11:50:45,850 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 127 [2022-04-06 11:50:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:45,851 INFO L225 Difference]: With dead ends: 185 [2022-04-06 11:50:45,851 INFO L226 Difference]: Without dead ends: 146 [2022-04-06 11:50:45,851 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2022-04-06 11:50:45,852 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 28 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:45,852 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 270 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:50:45,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-06 11:50:45,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2022-04-06 11:50:45,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 76 states have internal predecessors, (82), 53 states have call successors, (53), 14 states have call predecessors, (53), 13 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-06 11:50:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2022-04-06 11:50:45,872 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 127 [2022-04-06 11:50:45,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:45,873 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2022-04-06 11:50:45,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-04-06 11:50:45,873 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2022-04-06 11:50:45,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-06 11:50:45,875 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:45,875 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:50:45,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 11:50:46,092 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 11:50:46,092 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:46,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:46,092 INFO L85 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 2 times [2022-04-06 11:50:46,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:46,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393163468] [2022-04-06 11:50:46,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:46,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:46,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:50:46,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519869930] [2022-04-06 11:50:46,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:50:46,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:46,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:46,108 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:50:46,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 11:50:46,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:50:46,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:50:46,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-06 11:50:46,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:50:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 119 proven. 151 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-04-06 11:50:47,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:50:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2022-04-06 11:50:48,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:48,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393163468] [2022-04-06 11:50:48,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:50:48,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519869930] [2022-04-06 11:50:48,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519869930] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:50:48,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:50:48,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 28 [2022-04-06 11:50:48,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804703786] [2022-04-06 11:50:48,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:50:48,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 11:50:48,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:48,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 11:50:48,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-04-06 11:50:48,063 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand has 28 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 21 states have internal predecessors, (49), 14 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2022-04-06 11:50:49,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:49,744 INFO L93 Difference]: Finished difference Result 204 states and 264 transitions. [2022-04-06 11:50:49,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 11:50:49,745 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 21 states have internal predecessors, (49), 14 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) Word has length 138 [2022-04-06 11:50:49,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:49,746 INFO L225 Difference]: With dead ends: 204 [2022-04-06 11:50:49,746 INFO L226 Difference]: Without dead ends: 159 [2022-04-06 11:50:49,746 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 246 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=335, Invalid=1387, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 11:50:49,747 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 84 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:49,747 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 250 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 11:50:49,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-06 11:50:49,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 146. [2022-04-06 11:50:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 78 states have (on average 1.064102564102564) internal successors, (83), 78 states have internal predecessors, (83), 52 states have call successors, (52), 16 states have call predecessors, (52), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-06 11:50:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 186 transitions. [2022-04-06 11:50:49,766 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 186 transitions. Word has length 138 [2022-04-06 11:50:49,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:49,767 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 186 transitions. [2022-04-06 11:50:49,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 21 states have internal predecessors, (49), 14 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2022-04-06 11:50:49,767 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 186 transitions. [2022-04-06 11:50:49,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-04-06 11:50:49,768 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:49,768 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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] [2022-04-06 11:50:49,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-04-06 11:50:49,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:49,983 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:49,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:49,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1469599656, now seen corresponding path program 3 times [2022-04-06 11:50:49,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:49,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072208351] [2022-04-06 11:50:49,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:49,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:49,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:50:49,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58176510] [2022-04-06 11:50:49,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 11:50:49,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:49,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:49,999 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:50:50,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 11:50:50,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 11:50:50,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:50:50,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 11:50:50,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:50:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 118 proven. 59 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2022-04-06 11:50:50,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:50:51,090 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 11:50:51,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:51,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072208351] [2022-04-06 11:50:51,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:50:51,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58176510] [2022-04-06 11:50:51,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58176510] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:50:51,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:50:51,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 11:50:51,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088646625] [2022-04-06 11:50:51,232 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 11:50:51,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 11:50:51,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:51,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 11:50:51,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-04-06 11:50:51,233 INFO L87 Difference]: Start difference. First operand 146 states and 186 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 11:50:51,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:51,498 INFO L93 Difference]: Finished difference Result 182 states and 232 transitions. [2022-04-06 11:50:51,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 11:50:51,499 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 146 [2022-04-06 11:50:51,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:51,500 INFO L225 Difference]: With dead ends: 182 [2022-04-06 11:50:51,500 INFO L226 Difference]: Without dead ends: 180 [2022-04-06 11:50:51,500 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-04-06 11:50:51,501 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 39 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:51,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 133 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:50:51,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-04-06 11:50:51,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2022-04-06 11:50:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 96 states have (on average 1.0625) internal successors, (102), 96 states have internal predecessors, (102), 64 states have call successors, (64), 19 states have call predecessors, (64), 18 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-04-06 11:50:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 229 transitions. [2022-04-06 11:50:51,536 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 229 transitions. Word has length 146 [2022-04-06 11:50:51,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:51,536 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 229 transitions. [2022-04-06 11:50:51,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 11:50:51,536 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 229 transitions. [2022-04-06 11:50:51,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 11:50:51,541 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:51,542 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2022-04-06 11:50:51,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 11:50:51,758 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 11:50:51,759 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:51,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:51,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1402624196, now seen corresponding path program 4 times [2022-04-06 11:50:51,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:51,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219022648] [2022-04-06 11:50:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:51,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:51,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:50:51,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997987458] [2022-04-06 11:50:51,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 11:50:51,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:51,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:51,775 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:50:51,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 11:50:51,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 11:50:51,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:50:51,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 11:50:51,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:50:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2022-04-06 11:50:52,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:50:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 60 proven. 51 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-04-06 11:50:52,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:52,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219022648] [2022-04-06 11:50:52,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:50:52,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997987458] [2022-04-06 11:50:52,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997987458] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:50:52,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:50:52,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-04-06 11:50:52,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717349062] [2022-04-06 11:50:52,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:50:52,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 11:50:52,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:52,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 11:50:52,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-04-06 11:50:52,319 INFO L87 Difference]: Start difference. First operand 179 states and 229 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 12 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2022-04-06 11:50:52,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:52,659 INFO L93 Difference]: Finished difference Result 214 states and 274 transitions. [2022-04-06 11:50:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 11:50:52,660 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 12 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) Word has length 151 [2022-04-06 11:50:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:52,660 INFO L225 Difference]: With dead ends: 214 [2022-04-06 11:50:52,660 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 11:50:52,661 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-04-06 11:50:52,661 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 28 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:52,662 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 288 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:50:52,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 11:50:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-04-06 11:50:52,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 40 states have call successors, (40), 15 states have call predecessors, (40), 14 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-04-06 11:50:52,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 151 transitions. [2022-04-06 11:50:52,680 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 151 transitions. Word has length 151 [2022-04-06 11:50:52,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:52,680 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 151 transitions. [2022-04-06 11:50:52,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 12 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2022-04-06 11:50:52,680 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 151 transitions. [2022-04-06 11:50:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-04-06 11:50:52,682 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:50:52,682 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:50:52,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 11:50:52,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 11:50:52,891 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:50:52,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:50:52,892 INFO L85 PathProgramCache]: Analyzing trace with hash 477503177, now seen corresponding path program 5 times [2022-04-06 11:50:52,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:50:52,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849475254] [2022-04-06 11:50:52,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:50:52,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:50:52,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:50:52,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457727059] [2022-04-06 11:50:52,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 11:50:52,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:50:52,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:50:52,902 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:50:52,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 11:50:52,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-04-06 11:50:52,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:50:52,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 11:50:52,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:50:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 234 proven. 68 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2022-04-06 11:50:53,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:50:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 84 proven. 62 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2022-04-06 11:50:53,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:50:53,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849475254] [2022-04-06 11:50:53,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:50:53,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457727059] [2022-04-06 11:50:53,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457727059] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:50:53,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:50:53,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2022-04-06 11:50:53,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578943028] [2022-04-06 11:50:53,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:50:53,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 11:50:53,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:50:53,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 11:50:53,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-04-06 11:50:53,575 INFO L87 Difference]: Start difference. First operand 124 states and 151 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (56), 15 states have call predecessors, (56), 15 states have call successors, (56) [2022-04-06 11:50:53,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:50:53,931 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2022-04-06 11:50:53,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 11:50:53,932 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (56), 15 states have call predecessors, (56), 15 states have call successors, (56) Word has length 171 [2022-04-06 11:50:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:50:53,932 INFO L225 Difference]: With dead ends: 128 [2022-04-06 11:50:53,932 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 11:50:53,933 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-04-06 11:50:53,933 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 27 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:50:53,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 289 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:50:53,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 11:50:53,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 11:50:53,934 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) [2022-04-06 11:50:53,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 11:50:53,934 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 171 [2022-04-06 11:50:53,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:50:53,934 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 11:50:53,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (56), 15 states have call predecessors, (56), 15 states have call successors, (56) [2022-04-06 11:50:53,934 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 11:50:53,934 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 11:50:53,936 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 11:50:53,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 11:50:54,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 11:50:54,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 11:51:07,843 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|)) [2022-04-06 11:51:07,843 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-06 11:51:07,843 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-06 11:51:07,843 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 11:51:07,843 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 11:51:07,843 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-06 11:51:07,843 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-06 11:51:07,843 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2022-04-06 11:51:07,843 INFO L882 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2022-04-06 11:51:07,843 INFO L882 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2022-04-06 11:51:07,843 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2022-04-06 11:51:07,844 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 18 74) the Hoare annotation is: true [2022-04-06 11:51:07,844 INFO L885 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-04-06 11:51:07,844 INFO L882 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-04-06 11:51:07,844 INFO L878 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-04-06 11:51:07,844 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 2) (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-04-06 11:51:07,844 INFO L878 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 1 main_~x~0) (<= main_~y~0 2) (<= main_~x~0 2)) [2022-04-06 11:51:07,844 INFO L882 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2022-04-06 11:51:07,844 INFO L878 garLoopResultBuilder]: At program point L38-1(line 38) the Hoare annotation is: (and (= main_~s~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= 1 main_~a~0) (<= 0 main_~c~0) (= main_~b~0 main_~y~0) (<= (+ main_~c~0 main_~b~0) 2) (= main_~yy~0 (* main_~y~0 main_~y~0)) (= main_~q~0 0) (< main_~c~0 main_~b~0) (= main_~xy~0 (* main_~y~0 main_~x~0)) (= main_~a~0 main_~x~0) (<= main_~x~0 2) (= main_~p~0 1)) [2022-04-06 11:51:07,844 INFO L878 garLoopResultBuilder]: At program point L41-1(lines 39 68) the Hoare annotation is: (let ((.cse0 (< main_~b~0 main_~a~0)) (.cse1 (<= 1 main_~x~0)) (.cse2 (<= main_~y~0 2)) (.cse6 (<= 1 main_~y~0)) (.cse7 (* main_~b~0 2)) (.cse5 (<= main_~b~0 main_~c~0)) (.cse3 (= main_~s~0 1)) (.cse4 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse8 (<= 0 main_~c~0)) (.cse10 (= main_~xy~0 (* main_~y~0 main_~x~0))) (.cse9 (<= main_~x~0 2))) (or (and .cse0 (= (+ (* main_~x~0 2) main_~b~0) main_~y~0) .cse1 .cse2 .cse3 .cse4 (< main_~x~0 main_~y~0) (= (+ main_~q~0 2) 0) .cse5 .cse6) (and .cse0 (< (* main_~c~0 2) 2) .cse1 .cse2 (< .cse7 2) .cse4 .cse8 (<= 0 main_~b~0) .cse6 (= (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)) 0) .cse9) (and (= main_~p~0 0) (= main_~b~0 (+ main_~x~0 (* main_~a~0 main_~s~0))) (= main_~r~0 1) (= main_~a~0 main_~y~0) (< main_~c~0 .cse7) (= main_~b~0 main_~x~0) .cse5 (< main_~x~0 main_~a~0) (<= main_~a~0 2) (= main_~q~0 1) .cse10) (and .cse3 .cse4 (<= 1 main_~a~0) .cse8 (= main_~b~0 main_~y~0) (<= (+ main_~c~0 main_~b~0) 2) (= main_~yy~0 (* main_~y~0 main_~y~0)) (= main_~q~0 0) (< main_~c~0 main_~b~0) .cse10 (= main_~a~0 main_~x~0) .cse9 (= main_~p~0 1)))) [2022-04-06 11:51:07,844 INFO L878 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (and (= main_~s~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= 1 main_~a~0) (<= 0 main_~c~0) (= main_~b~0 main_~y~0) (<= (+ main_~c~0 main_~b~0) 2) (= main_~yy~0 (* main_~y~0 main_~y~0)) (= main_~q~0 0) (< main_~c~0 main_~b~0) (= main_~xy~0 (* main_~y~0 main_~x~0)) (= main_~a~0 main_~x~0) (<= main_~x~0 2) (= main_~p~0 1)) [2022-04-06 11:51:07,844 INFO L878 garLoopResultBuilder]: At program point L41-2(lines 41 68) the Hoare annotation is: (and (<= 1 main_~x~0) (<= main_~y~0 2) (= main_~b~0 0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= 1 main_~y~0) (= (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)) 0)) [2022-04-06 11:51:07,844 INFO L882 garLoopResultBuilder]: For program point L42(lines 42 43) no Hoare annotation was computed. [2022-04-06 11:51:07,844 INFO L878 garLoopResultBuilder]: At program point L71(line 71) the Hoare annotation is: (and (<= 1 main_~x~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (or (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (= main_~b~0 0)) (<= 1 main_~y~0)) [2022-04-06 11:51:07,844 INFO L878 garLoopResultBuilder]: At program point L47-2(lines 47 56) the Hoare annotation is: (let ((.cse20 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse0 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse1 (<= 1 main_~x~0)) (.cse3 (= main_~r~0 1)) (.cse4 (= main_~a~0 main_~y~0)) (.cse5 (< main_~x~0 main_~a~0)) (.cse6 (<= 1 main_~b~0)) (.cse7 (= main_~q~0 1)) (.cse8 (< main_~b~0 2)) (.cse11 (<= 1 main_~a~0)) (.cse19 (<= (+ main_~c~0 (* main_~b~0 2)) 2)) (.cse10 (= main_~s~0 1)) (.cse2 (= main_~a~0 .cse20)) (.cse21 (<= 0 main_~c~0)) (.cse12 (= main_~b~0 main_~y~0)) (.cse13 (= main_~yy~0 (* main_~y~0 main_~y~0))) (.cse14 (= main_~q~0 0)) (.cse15 (<= 1 main_~y~0)) (.cse9 (= main_~xy~0 (* main_~y~0 main_~x~0))) (.cse16 (= main_~a~0 main_~x~0)) (.cse17 (<= main_~x~0 2)) (.cse18 (= main_~p~0 1))) (or (and .cse0 (<= 1 main_~c~0) .cse1 (= main_~b~0 (+ main_~x~0 (* main_~a~0 main_~s~0))) .cse2 .cse3 .cse4 (<= main_~c~0 2) .cse5 (<= main_~a~0 2) .cse6 .cse7 .cse8 .cse9) (and (<= main_~y~0 2) (= main_~k~0 0) .cse10 .cse2 .cse11 .cse12 .cse13 .cse14 .cse15 .cse9 .cse16 (= main_~c~0 main_~x~0) .cse17 .cse18) (and .cse0 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) .cse1 .cse2 .cse3 .cse4 .cse5 (= main_~k~0 2) .cse19 .cse6 .cse7 .cse8 .cse9) (and (= (+ (* main_~k~0 main_~y~0 main_~s~0) (* main_~q~0 main_~k~0 main_~x~0)) .cse20) .cse10 .cse2 .cse11 .cse21 .cse12 .cse13 .cse19 .cse14 .cse15 .cse9 .cse16 .cse17 .cse18) (and .cse10 .cse2 .cse21 .cse12 (= main_~k~0 1) .cse13 .cse14 .cse15 .cse9 .cse16 (= main_~x~0 (+ main_~c~0 main_~y~0)) .cse17 .cse18)))) [2022-04-06 11:51:07,844 INFO L882 garLoopResultBuilder]: For program point L72(line 72) no Hoare annotation was computed. [2022-04-06 11:51:07,845 INFO L882 garLoopResultBuilder]: For program point L47-3(lines 47 56) no Hoare annotation was computed. [2022-04-06 11:51:07,845 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse20 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse0 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse1 (<= 1 main_~x~0)) (.cse3 (= main_~r~0 1)) (.cse4 (= main_~a~0 main_~y~0)) (.cse5 (< main_~x~0 main_~a~0)) (.cse6 (<= 1 main_~b~0)) (.cse7 (= main_~q~0 1)) (.cse8 (< main_~b~0 2)) (.cse11 (<= 1 main_~a~0)) (.cse19 (<= (+ main_~c~0 (* main_~b~0 2)) 2)) (.cse10 (= main_~s~0 1)) (.cse2 (= main_~a~0 .cse20)) (.cse21 (<= 0 main_~c~0)) (.cse12 (= main_~b~0 main_~y~0)) (.cse13 (= main_~yy~0 (* main_~y~0 main_~y~0))) (.cse14 (= main_~q~0 0)) (.cse15 (<= 1 main_~y~0)) (.cse9 (= main_~xy~0 (* main_~y~0 main_~x~0))) (.cse16 (= main_~a~0 main_~x~0)) (.cse17 (<= main_~x~0 2)) (.cse18 (= main_~p~0 1))) (or (and .cse0 (<= 1 main_~c~0) .cse1 (= main_~b~0 (+ main_~x~0 (* main_~a~0 main_~s~0))) .cse2 .cse3 .cse4 (<= main_~c~0 2) .cse5 (<= main_~a~0 2) .cse6 .cse7 .cse8 .cse9) (and (<= main_~y~0 2) (= main_~k~0 0) .cse10 .cse2 .cse11 .cse12 .cse13 .cse14 .cse15 .cse9 .cse16 (= main_~c~0 main_~x~0) .cse17 .cse18) (and .cse0 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) .cse1 .cse2 .cse3 .cse4 .cse5 (= main_~k~0 2) .cse19 .cse6 .cse7 .cse8 .cse9) (and (= (+ (* main_~k~0 main_~y~0 main_~s~0) (* main_~q~0 main_~k~0 main_~x~0)) .cse20) .cse10 .cse2 .cse11 .cse21 .cse12 .cse13 .cse19 .cse14 .cse15 .cse9 .cse16 .cse17 .cse18) (and .cse10 .cse2 .cse21 .cse12 (= main_~k~0 1) .cse13 .cse14 .cse15 .cse9 .cse16 (= main_~x~0 (+ main_~c~0 main_~y~0)) .cse17 .cse18)))) [2022-04-06 11:51:07,845 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 18 74) no Hoare annotation was computed. [2022-04-06 11:51:07,845 INFO L878 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse20 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse0 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse1 (<= 1 main_~x~0)) (.cse3 (= main_~r~0 1)) (.cse4 (= main_~a~0 main_~y~0)) (.cse5 (< main_~x~0 main_~a~0)) (.cse6 (<= 1 main_~b~0)) (.cse7 (= main_~q~0 1)) (.cse8 (< main_~b~0 2)) (.cse11 (<= 1 main_~a~0)) (.cse19 (<= (+ main_~c~0 (* main_~b~0 2)) 2)) (.cse10 (= main_~s~0 1)) (.cse2 (= main_~a~0 .cse20)) (.cse21 (<= 0 main_~c~0)) (.cse12 (= main_~b~0 main_~y~0)) (.cse13 (= main_~yy~0 (* main_~y~0 main_~y~0))) (.cse14 (= main_~q~0 0)) (.cse15 (<= 1 main_~y~0)) (.cse9 (= main_~xy~0 (* main_~y~0 main_~x~0))) (.cse16 (= main_~a~0 main_~x~0)) (.cse17 (<= main_~x~0 2)) (.cse18 (= main_~p~0 1))) (or (and .cse0 (<= 1 main_~c~0) .cse1 (= main_~b~0 (+ main_~x~0 (* main_~a~0 main_~s~0))) .cse2 .cse3 .cse4 (<= main_~c~0 2) .cse5 (<= main_~a~0 2) .cse6 .cse7 .cse8 .cse9) (and (<= main_~y~0 2) (= main_~k~0 0) .cse10 .cse2 .cse11 .cse12 .cse13 .cse14 .cse15 .cse9 .cse16 (= main_~c~0 main_~x~0) .cse17 .cse18) (and .cse0 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) .cse1 .cse2 .cse3 .cse4 .cse5 (= main_~k~0 2) .cse19 .cse6 .cse7 .cse8 .cse9) (and (= (+ (* main_~k~0 main_~y~0 main_~s~0) (* main_~q~0 main_~k~0 main_~x~0)) .cse20) .cse10 .cse2 .cse11 .cse21 .cse12 .cse13 .cse19 .cse14 .cse15 .cse9 .cse16 .cse17 .cse18) (and .cse10 .cse2 .cse21 .cse12 (= main_~k~0 1) .cse13 .cse14 .cse15 .cse9 .cse16 (= main_~x~0 (+ main_~c~0 main_~y~0)) .cse17 .cse18)))) [2022-04-06 11:51:07,845 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 18 74) no Hoare annotation was computed. [2022-04-06 11:51:07,845 INFO L878 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse20 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse0 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse1 (<= 1 main_~x~0)) (.cse3 (= main_~r~0 1)) (.cse4 (= main_~a~0 main_~y~0)) (.cse5 (< main_~x~0 main_~a~0)) (.cse6 (<= 1 main_~b~0)) (.cse7 (= main_~q~0 1)) (.cse8 (< main_~b~0 2)) (.cse11 (<= 1 main_~a~0)) (.cse19 (<= (+ main_~c~0 (* main_~b~0 2)) 2)) (.cse10 (= main_~s~0 1)) (.cse2 (= main_~a~0 .cse20)) (.cse21 (<= 0 main_~c~0)) (.cse12 (= main_~b~0 main_~y~0)) (.cse13 (= main_~yy~0 (* main_~y~0 main_~y~0))) (.cse14 (= main_~q~0 0)) (.cse15 (<= 1 main_~y~0)) (.cse9 (= main_~xy~0 (* main_~y~0 main_~x~0))) (.cse16 (= main_~a~0 main_~x~0)) (.cse17 (<= main_~x~0 2)) (.cse18 (= main_~p~0 1))) (or (and .cse0 (<= 1 main_~c~0) .cse1 (= main_~b~0 (+ main_~x~0 (* main_~a~0 main_~s~0))) .cse2 .cse3 .cse4 (<= main_~c~0 2) .cse5 (<= main_~a~0 2) .cse6 .cse7 .cse8 .cse9) (and (<= main_~y~0 2) (= main_~k~0 0) .cse10 .cse2 .cse11 .cse12 .cse13 .cse14 .cse15 .cse9 .cse16 (= main_~c~0 main_~x~0) .cse17 .cse18) (and .cse0 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) .cse1 .cse2 .cse3 .cse4 .cse5 (= main_~k~0 2) .cse19 .cse6 .cse7 .cse8 .cse9) (and (= (+ (* main_~k~0 main_~y~0 main_~s~0) (* main_~q~0 main_~k~0 main_~x~0)) .cse20) .cse10 .cse2 .cse11 .cse21 .cse12 .cse13 .cse19 .cse14 .cse15 .cse9 .cse16 .cse17 .cse18) (and .cse10 .cse2 .cse21 .cse12 (= main_~k~0 1) .cse13 .cse14 .cse15 .cse9 .cse16 (= main_~x~0 (+ main_~c~0 main_~y~0)) .cse17 .cse18)))) [2022-04-06 11:51:07,845 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse21 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse11 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse12 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse13 (<= 1 main_~x~0)) (.cse14 (= main_~r~0 1)) (.cse15 (= main_~a~0 main_~y~0)) (.cse16 (< main_~x~0 main_~a~0)) (.cse17 (<= 1 main_~b~0)) (.cse18 (= main_~q~0 1)) (.cse19 (< main_~b~0 2)) (.cse2 (<= 1 main_~a~0)) (.cse20 (<= (+ main_~c~0 (* main_~b~0 2)) 2)) (.cse0 (= main_~s~0 1)) (.cse1 (= main_~a~0 .cse21)) (.cse22 (<= 0 main_~c~0)) (.cse3 (= main_~b~0 main_~y~0)) (.cse4 (= main_~yy~0 (* main_~y~0 main_~y~0))) (.cse5 (= main_~q~0 0)) (.cse6 (<= 1 main_~y~0)) (.cse7 (= main_~xy~0 (* main_~y~0 main_~x~0))) (.cse8 (= main_~a~0 main_~x~0)) (.cse9 (<= main_~x~0 2)) (.cse10 (= main_~p~0 1))) (or (and (<= main_~y~0 2) (= main_~k~0 0) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 (= main_~c~0 main_~x~0) .cse9 .cse10) (and .cse11 (<= 1 main_~c~0) .cse12 .cse13 .cse1 .cse14 .cse15 (<= main_~c~0 2) .cse16 (<= main_~a~0 2) .cse17 .cse18 .cse19 .cse7) (and .cse11 .cse12 .cse13 .cse1 .cse14 .cse15 .cse16 (= main_~k~0 2) .cse20 .cse17 .cse18 .cse19 .cse7) (and (= (+ (* main_~k~0 main_~y~0 main_~s~0) (* main_~q~0 main_~k~0 main_~x~0)) .cse21) .cse0 .cse1 .cse2 .cse22 .cse3 .cse4 .cse20 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10) (and .cse0 .cse1 .cse22 .cse3 (= main_~k~0 1) .cse4 .cse5 .cse6 .cse7 .cse8 (= main_~x~0 (+ main_~c~0 main_~y~0)) .cse9 .cse10)))) [2022-04-06 11:51:07,845 INFO L882 garLoopResultBuilder]: For program point L51(lines 47 56) no Hoare annotation was computed. [2022-04-06 11:51:07,845 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2022-04-06 11:51:07,845 INFO L882 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2022-04-06 11:51:07,845 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2022-04-06 11:51:07,845 INFO L882 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2022-04-06 11:51:07,845 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2022-04-06 11:51:07,846 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2022-04-06 11:51:07,847 INFO L719 BasicCegarLoop]: Path program histogram: [5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:07,848 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 11:51:07,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:51:07 BasicIcfg [2022-04-06 11:51:07,861 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 11:51:07,861 INFO L158 Benchmark]: Toolchain (without parser) took 35343.66ms. Allocated memory was 187.7MB in the beginning and 392.2MB in the end (delta: 204.5MB). Free memory was 129.0MB in the beginning and 281.1MB in the end (delta: -152.1MB). Peak memory consumption was 200.3MB. Max. memory is 8.0GB. [2022-04-06 11:51:07,861 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 187.7MB. Free memory is still 145.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 11:51:07,861 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.20ms. Allocated memory was 187.7MB in the beginning and 271.6MB in the end (delta: 83.9MB). Free memory was 162.4MB in the beginning and 242.2MB in the end (delta: -79.8MB). Peak memory consumption was 7.7MB. Max. memory is 8.0GB. [2022-04-06 11:51:07,862 INFO L158 Benchmark]: Boogie Preprocessor took 30.60ms. Allocated memory is still 271.6MB. Free memory was 242.2MB in the beginning and 240.5MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 11:51:07,862 INFO L158 Benchmark]: RCFGBuilder took 212.09ms. Allocated memory is still 271.6MB. Free memory was 240.5MB in the beginning and 228.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 11:51:07,862 INFO L158 Benchmark]: IcfgTransformer took 16.22ms. Allocated memory is still 271.6MB. Free memory was 228.6MB in the beginning and 227.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 11:51:07,862 INFO L158 Benchmark]: TraceAbstraction took 34875.27ms. Allocated memory was 271.6MB in the beginning and 392.2MB in the end (delta: 120.6MB). Free memory was 226.9MB in the beginning and 281.1MB in the end (delta: -54.2MB). Peak memory consumption was 214.2MB. Max. memory is 8.0GB. [2022-04-06 11:51:07,863 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 187.7MB. Free memory is still 145.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 180.20ms. Allocated memory was 187.7MB in the beginning and 271.6MB in the end (delta: 83.9MB). Free memory was 162.4MB in the beginning and 242.2MB in the end (delta: -79.8MB). Peak memory consumption was 7.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.60ms. Allocated memory is still 271.6MB. Free memory was 242.2MB in the beginning and 240.5MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 212.09ms. Allocated memory is still 271.6MB. Free memory was 240.5MB in the beginning and 228.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 16.22ms. Allocated memory is still 271.6MB. Free memory was 228.6MB in the beginning and 227.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 34875.27ms. Allocated memory was 271.6MB in the beginning and 392.2MB in the end (delta: 120.6MB). Free memory was 226.9MB in the beginning and 281.1MB in the end (delta: -54.2MB). Peak memory consumption was 214.2MB. 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: 34.8s, OverallIterations: 18, TraceHistogramMax: 23, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 6.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 13.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 618 SdHoareTripleChecker+Valid, 4.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 525 mSDsluCounter, 3750 SdHoareTripleChecker+Invalid, 4.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2893 mSDsCounter, 827 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4873 IncrementalHoareTripleChecker+Invalid, 5700 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 827 mSolverCounterUnsat, 857 mSDtfsCounter, 4873 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2853 GetRequests, 2538 SyntacticMatches, 19 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=204occurred in iteration=11, InterpolantAutomatonStates: 201, 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, 18 MinimizatonAttempts, 95 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 20 LocationsWithAnnotation, 193 PreInvPairs, 249 NumberOfFragments, 1890 HoareAnnotationTreeSize, 193 FomulaSimplifications, 2296 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 20 FomulaSimplificationsInter, 7197 FormulaSimplificationTreeSizeReductionInter, 13.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 9.0s InterpolantComputationTime, 1642 NumberOfCodeBlocks, 1520 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 2686 ConstructedInterpolants, 0 QuantifiedInterpolants, 9132 SizeOfPredicates, 113 NumberOfNonLiveVariables, 3743 ConjunctsInSsa, 435 ConjunctsInUnsatCore, 29 InterpolantComputations, 4 PerfectInterpolantSequences, 8794/9490 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: 39]: Loop Invariant Derived loop invariant: (((((((((((b < a && x * 2 + b == y) && 1 <= x) && y <= 2) && s == 1) && a == y * r + p * x) && x < y) && q + 2 == 0) && b <= c) && 1 <= y) || ((((((((((b < a && c * 2 < 2) && 1 <= x) && y <= 2) && b * 2 < 2) && a == y * r + p * x) && 0 <= c) && 0 <= b) && 1 <= y) && q * x + y * s == 0) && x <= 2)) || ((((((((((p == 0 && b == x + a * s) && r == 1) && a == y) && c < b * 2) && b == x) && b <= c) && x < a) && a <= 2) && q == 1) && xy == y * x)) || ((((((((((((s == 1 && a == y * r + p * x) && 1 <= a) && 0 <= c) && b == y) && c + b <= 2) && yy == y * y) && q == 0) && c < b) && xy == y * x) && a == x) && x <= 2) && p == 1) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: ((((((((((((((((a == c + b * k && 1 <= c) && 1 <= x) && b == x + a * s) && a == y * r + p * x) && r == 1) && a == y) && c <= 2) && x < a) && a <= 2) && 1 <= b) && q == 1) && b < 2) && xy == y * x) || (((((((((((((y <= 2 && k == 0) && s == 1) && a == y * r + p * x) && 1 <= a) && b == y) && yy == y * y) && q == 0) && 1 <= y) && xy == y * x) && a == x) && c == x) && x <= 2) && p == 1)) || ((((((((((((a == c + b * k && b == q * x + y * s) && 1 <= x) && a == y * r + p * x) && r == 1) && a == y) && x < a) && k == 2) && c + b * 2 <= 2) && 1 <= b) && q == 1) && b < 2) && xy == y * x)) || (((((((((((((k * y * s + q * k * x == y * r + p * x && s == 1) && a == y * r + p * x) && 1 <= a) && 0 <= c) && b == y) && yy == y * y) && c + b * 2 <= 2) && q == 0) && 1 <= y) && xy == y * x) && a == x) && x <= 2) && p == 1)) || ((((((((((((s == 1 && a == y * r + p * x) && 0 <= c) && b == y) && k == 1) && yy == y * y) && q == 0) && 1 <= y) && xy == y * x) && a == x) && x == c + y) && x <= 2) && p == 1) RESULT: Ultimate proved your program to be correct! [2022-04-06 11:51:07,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...