/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 22:49:09,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 22:49:09,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 22:49:09,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 22:49:09,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 22:49:09,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 22:49:09,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 22:49:09,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 22:49:09,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 22:49:09,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 22:49:09,945 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 22:49:09,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 22:49:09,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 22:49:09,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 22:49:09,948 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 22:49:09,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 22:49:09,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 22:49:09,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 22:49:09,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 22:49:09,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 22:49:09,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 22:49:09,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 22:49:09,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 22:49:09,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 22:49:09,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 22:49:09,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 22:49:09,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 22:49:09,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 22:49:09,972 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 22:49:09,996 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 22:49:09,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 22:49:09,997 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 22:49:09,997 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 22:49:09,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 22:49:09,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 22:49:09,998 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 22:49:09,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 22:49:09,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 22:49:09,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 22:49:09,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 22:49:09,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 22:49:09,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 22:49:09,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 22:49:10,000 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 22:49:10,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 22:49:10,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 22:49:10,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 22:49:10,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 22:49:10,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:49:10,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 22:49:10,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 22:49:10,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 22:49:10,000 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 22:49:10,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 22:49:10,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 22:49:10,001 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 22:49:10,001 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 22:49:10,002 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 22:49:10,002 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 22:49:10,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 22:49:10,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 22:49:10,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 22:49:10,206 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 22:49:10,207 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 22:49:10,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2022-02-23 22:49:10,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d43276a0e/db14929c1721400a848fcbd2f7625cc6/FLAGabf2f06b8 [2022-02-23 22:49:10,586 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 22:49:10,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2022-02-23 22:49:10,593 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d43276a0e/db14929c1721400a848fcbd2f7625cc6/FLAGabf2f06b8 [2022-02-23 22:49:11,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d43276a0e/db14929c1721400a848fcbd2f7625cc6 [2022-02-23 22:49:11,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 22:49:11,012 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 22:49:11,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 22:49:11,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 22:49:11,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 22:49:11,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:49:11" (1/1) ... [2022-02-23 22:49:11,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2575beed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:49:11, skipping insertion in model container [2022-02-23 22:49:11,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:49:11" (1/1) ... [2022-02-23 22:49:11,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 22:49:11,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 22:49:11,159 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2022-02-23 22:49:11,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:49:11,184 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 22:49:11,193 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2022-02-23 22:49:11,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:49:11,223 INFO L208 MainTranslator]: Completed translation [2022-02-23 22:49:11,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:49:11 WrapperNode [2022-02-23 22:49:11,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 22:49:11,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 22:49:11,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 22:49:11,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 22:49:11,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:49:11" (1/1) ... [2022-02-23 22:49:11,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:49:11" (1/1) ... [2022-02-23 22:49:11,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:49:11" (1/1) ... [2022-02-23 22:49:11,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:49:11" (1/1) ... [2022-02-23 22:49:11,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:49:11" (1/1) ... [2022-02-23 22:49:11,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:49:11" (1/1) ... [2022-02-23 22:49:11,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:49:11" (1/1) ... [2022-02-23 22:49:11,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 22:49:11,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 22:49:11,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 22:49:11,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 22:49:11,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:49:11" (1/1) ... [2022-02-23 22:49:11,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:49:11,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:49:11,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 22:49:11,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 22:49:11,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 22:49:11,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 22:49:11,313 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 22:49:11,313 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 22:49:11,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 22:49:11,314 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 22:49:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 22:49:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 22:49:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 22:49:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 22:49:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 22:49:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 22:49:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 22:49:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 22:49:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 22:49:11,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 22:49:11,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 22:49:11,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 22:49:11,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 22:49:11,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 22:49:11,364 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 22:49:11,365 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 22:49:11,530 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 22:49:11,534 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 22:49:11,534 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-23 22:49:11,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:49:11 BoogieIcfgContainer [2022-02-23 22:49:11,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 22:49:11,536 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 22:49:11,536 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 22:49:11,537 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 22:49:11,539 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:49:11" (1/1) ... [2022-02-23 22:49:11,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:49:11 BasicIcfg [2022-02-23 22:49:11,567 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 22:49:11,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 22:49:11,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 22:49:11,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 22:49:11,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:49:11" (1/4) ... [2022-02-23 22:49:11,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9bfdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:49:11, skipping insertion in model container [2022-02-23 22:49:11,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:49:11" (2/4) ... [2022-02-23 22:49:11,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9bfdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:49:11, skipping insertion in model container [2022-02-23 22:49:11,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:49:11" (3/4) ... [2022-02-23 22:49:11,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9bfdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:49:11, skipping insertion in model container [2022-02-23 22:49:11,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:49:11" (4/4) ... [2022-02-23 22:49:11,574 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.cqvasr [2022-02-23 22:49:11,578 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 22:49:11,578 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 22:49:11,624 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 22:49:11,636 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 22:49:11,636 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 22:49:11,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 22:49:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 22:49:11,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:49:11,658 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:49:11,659 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:49:11,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:49:11,662 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-02-23 22:49:11,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:49:11,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938410578] [2022-02-23 22:49:11,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:11,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:49:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:11,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:49:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:11,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:49:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:11,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 22:49:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:11,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 22:49:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:11,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-23 22:49:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:49:11,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:49:11,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938410578] [2022-02-23 22:49:11,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938410578] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:49:11,861 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:49:11,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 22:49:11,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502045559] [2022-02-23 22:49:11,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:49:11,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 22:49:11,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:49:11,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 22:49:11,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:49:11,883 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:49:11,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:49:11,936 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-02-23 22:49:11,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 22:49:11,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-02-23 22:49:11,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:49:11,943 INFO L225 Difference]: With dead ends: 73 [2022-02-23 22:49:11,943 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 22:49:11,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:49:11,948 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:49:11,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:49:11,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 22:49:11,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-23 22:49:11,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 22:49:11,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-02-23 22:49:11,982 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-02-23 22:49:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:49:11,983 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-02-23 22:49:11,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:49:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-02-23 22:49:11,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 22:49:11,985 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:49:11,986 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:49:11,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 22:49:11,987 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:49:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:49:11,988 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-02-23 22:49:11,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:49:11,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198488847] [2022-02-23 22:49:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:11,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:49:12,019 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:49:12,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024710704] [2022-02-23 22:49:12,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:12,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:12,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:49:12,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:49:12,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 22:49:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:12,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:49:12,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:49:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 22:49:12,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:49:12,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:49:12,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198488847] [2022-02-23 22:49:12,234 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:49:12,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024710704] [2022-02-23 22:49:12,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024710704] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:49:12,235 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:49:12,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 22:49:12,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552786982] [2022-02-23 22:49:12,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:49:12,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 22:49:12,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:49:12,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 22:49:12,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:49:12,237 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:49:12,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:49:12,330 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-02-23 22:49:12,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 22:49:12,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-02-23 22:49:12,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:49:12,333 INFO L225 Difference]: With dead ends: 54 [2022-02-23 22:49:12,333 INFO L226 Difference]: Without dead ends: 47 [2022-02-23 22:49:12,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 22:49:12,334 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:49:12,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:49:12,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-23 22:49:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-02-23 22:49:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 22:49:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-02-23 22:49:12,354 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-02-23 22:49:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:49:12,355 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-02-23 22:49:12,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:49:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-02-23 22:49:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-23 22:49:12,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:49:12,357 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:49:12,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 22:49:12,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:12,577 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:49:12,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:49:12,577 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-02-23 22:49:12,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:49:12,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643762165] [2022-02-23 22:49:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:12,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:49:12,591 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:49:12,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392550268] [2022-02-23 22:49:12,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:12,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:12,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:49:12,592 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:49:12,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 22:49:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:12,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 22:49:12,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:49:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 22:49:12,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:49:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:49:12,957 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:49:12,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643762165] [2022-02-23 22:49:12,958 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:49:12,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392550268] [2022-02-23 22:49:12,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392550268] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 22:49:12,958 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:49:12,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-02-23 22:49:12,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190599122] [2022-02-23 22:49:12,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:49:12,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:49:12,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:49:12,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:49:12,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-23 22:49:12,959 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:49:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:49:12,988 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-02-23 22:49:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:49:12,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-02-23 22:49:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:49:12,989 INFO L225 Difference]: With dead ends: 53 [2022-02-23 22:49:12,989 INFO L226 Difference]: Without dead ends: 51 [2022-02-23 22:49:12,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-23 22:49:12,990 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:49:12,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 161 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:49:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-23 22:49:12,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-02-23 22:49:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 22:49:12,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-02-23 22:49:12,996 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-02-23 22:49:12,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:49:12,996 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-02-23 22:49:12,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:49:12,997 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-02-23 22:49:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-23 22:49:12,997 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:49:12,998 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:49:13,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 22:49:13,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 22:49:13,214 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:49:13,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:49:13,214 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-02-23 22:49:13,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:49:13,215 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335502096] [2022-02-23 22:49:13,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:13,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:49:13,232 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:49:13,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875110434] [2022-02-23 22:49:13,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:13,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:13,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:49:13,238 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:49:13,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 22:49:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:13,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 22:49:13,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:49:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 22:49:13,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:49:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 22:49:13,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:49:13,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335502096] [2022-02-23 22:49:13,422 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:49:13,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875110434] [2022-02-23 22:49:13,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875110434] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:49:13,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:49:13,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-02-23 22:49:13,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30900225] [2022-02-23 22:49:13,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:49:13,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 22:49:13,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:49:13,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 22:49:13,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-23 22:49:13,424 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:49:13,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:49:13,544 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-02-23 22:49:13,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 22:49:13,545 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-02-23 22:49:13,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:49:13,546 INFO L225 Difference]: With dead ends: 103 [2022-02-23 22:49:13,546 INFO L226 Difference]: Without dead ends: 96 [2022-02-23 22:49:13,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-23 22:49:13,547 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:49:13,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 295 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:49:13,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-23 22:49:13,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-02-23 22:49:13,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 22:49:13,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-02-23 22:49:13,557 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-02-23 22:49:13,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:49:13,557 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-02-23 22:49:13,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:49:13,558 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-02-23 22:49:13,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-23 22:49:13,558 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:49:13,558 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:49:13,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 22:49:13,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:13,759 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:49:13,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:49:13,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-02-23 22:49:13,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:49:13,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135116973] [2022-02-23 22:49:13,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:13,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:49:13,768 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:49:13,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487064445] [2022-02-23 22:49:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:13,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:13,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:49:13,770 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:49:13,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 22:49:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:13,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-23 22:49:13,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:49:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 22:49:14,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:49:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:49:14,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:49:14,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135116973] [2022-02-23 22:49:14,232 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:49:14,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487064445] [2022-02-23 22:49:14,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487064445] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 22:49:14,233 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:49:14,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-02-23 22:49:14,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618149876] [2022-02-23 22:49:14,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:49:14,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 22:49:14,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:49:14,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 22:49:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-23 22:49:14,234 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-23 22:49:14,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:49:14,289 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-02-23 22:49:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 22:49:14,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-02-23 22:49:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:49:14,293 INFO L225 Difference]: With dead ends: 79 [2022-02-23 22:49:14,293 INFO L226 Difference]: Without dead ends: 77 [2022-02-23 22:49:14,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-02-23 22:49:14,295 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 27 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:49:14,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 192 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:49:14,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-23 22:49:14,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-02-23 22:49:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 22:49:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-02-23 22:49:14,319 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-02-23 22:49:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:49:14,320 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-02-23 22:49:14,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-23 22:49:14,321 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-02-23 22:49:14,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-23 22:49:14,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:49:14,323 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:49:14,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 22:49:14,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:14,541 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:49:14,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:49:14,541 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-02-23 22:49:14,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:49:14,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521971738] [2022-02-23 22:49:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:14,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:49:14,555 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:49:14,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331653978] [2022-02-23 22:49:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:14,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:14,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:49:14,565 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:49:14,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 22:49:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:14,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-23 22:49:14,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:49:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 22:49:14,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:49:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:49:14,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:49:14,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521971738] [2022-02-23 22:49:14,990 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:49:14,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331653978] [2022-02-23 22:49:14,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331653978] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:49:14,990 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:49:14,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-02-23 22:49:14,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235247428] [2022-02-23 22:49:14,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:49:14,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 22:49:14,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:49:14,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 22:49:14,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-02-23 22:49:14,992 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 22:49:15,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:49:15,379 INFO L93 Difference]: Finished difference Result 118 states and 159 transitions. [2022-02-23 22:49:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-23 22:49:15,379 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-02-23 22:49:15,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:49:15,380 INFO L225 Difference]: With dead ends: 118 [2022-02-23 22:49:15,380 INFO L226 Difference]: Without dead ends: 116 [2022-02-23 22:49:15,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-02-23 22:49:15,381 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 106 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:49:15,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 347 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 22:49:15,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-23 22:49:15,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-02-23 22:49:15,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-23 22:49:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-02-23 22:49:15,399 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-02-23 22:49:15,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:49:15,399 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-02-23 22:49:15,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 22:49:15,399 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-02-23 22:49:15,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 22:49:15,402 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:49:15,406 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:49:15,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 22:49:15,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:15,612 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:49:15,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:49:15,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-02-23 22:49:15,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:49:15,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148793455] [2022-02-23 22:49:15,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:15,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:49:15,620 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:49:15,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781465668] [2022-02-23 22:49:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:15,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:15,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:49:15,621 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:49:15,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 22:49:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:15,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:49:15,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:49:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 22:49:15,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:49:15,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:49:15,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148793455] [2022-02-23 22:49:15,727 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:49:15,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781465668] [2022-02-23 22:49:15,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781465668] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:49:15,728 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:49:15,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:49:15,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887573030] [2022-02-23 22:49:15,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:49:15,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:49:15,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:49:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:49:15,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:49:15,729 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 22:49:15,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:49:15,768 INFO L93 Difference]: Finished difference Result 151 states and 213 transitions. [2022-02-23 22:49:15,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:49:15,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-02-23 22:49:15,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:49:15,769 INFO L225 Difference]: With dead ends: 151 [2022-02-23 22:49:15,769 INFO L226 Difference]: Without dead ends: 149 [2022-02-23 22:49:15,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:49:15,770 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:49:15,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:49:15,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-23 22:49:15,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-02-23 22:49:15,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-02-23 22:49:15,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-02-23 22:49:15,786 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-02-23 22:49:15,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:49:15,787 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-02-23 22:49:15,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 22:49:15,787 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-02-23 22:49:15,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 22:49:15,798 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:49:15,798 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-02-23 22:49:15,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-23 22:49:16,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:16,012 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:49:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:49:16,012 INFO L85 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2022-02-23 22:49:16,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:49:16,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577208163] [2022-02-23 22:49:16,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:16,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:49:16,019 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:49:16,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616748468] [2022-02-23 22:49:16,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:16,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:16,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:49:16,021 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:49:16,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 22:49:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:16,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-23 22:49:16,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:49:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 22:49:16,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:49:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:49:16,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:49:16,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577208163] [2022-02-23 22:49:16,577 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:49:16,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616748468] [2022-02-23 22:49:16,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616748468] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:49:16,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:49:16,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 16 [2022-02-23 22:49:16,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712130259] [2022-02-23 22:49:16,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:49:16,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 22:49:16,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:49:16,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 22:49:16,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-23 22:49:16,578 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-23 22:49:17,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:49:17,406 INFO L93 Difference]: Finished difference Result 221 states and 311 transitions. [2022-02-23 22:49:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-23 22:49:17,407 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 47 [2022-02-23 22:49:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:49:17,409 INFO L225 Difference]: With dead ends: 221 [2022-02-23 22:49:17,410 INFO L226 Difference]: Without dead ends: 219 [2022-02-23 22:49:17,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-02-23 22:49:17,411 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 135 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 22:49:17,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 378 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 446 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2022-02-23 22:49:17,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-02-23 22:49:17,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 203. [2022-02-23 22:49:17,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 131 states have (on average 1.2748091603053435) internal successors, (167), 136 states have internal predecessors, (167), 61 states have call successors, (61), 11 states have call predecessors, (61), 10 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2022-02-23 22:49:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 287 transitions. [2022-02-23 22:49:17,432 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 287 transitions. Word has length 47 [2022-02-23 22:49:17,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:49:17,432 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 287 transitions. [2022-02-23 22:49:17,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-23 22:49:17,433 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 287 transitions. [2022-02-23 22:49:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 22:49:17,433 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:49:17,433 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-02-23 22:49:17,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 22:49:17,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:17,642 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:49:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:49:17,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2022-02-23 22:49:17,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:49:17,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337329605] [2022-02-23 22:49:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:17,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:49:17,652 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:49:17,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156074005] [2022-02-23 22:49:17,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:49:17,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:17,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:49:17,653 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:49:17,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 22:49:17,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 22:49:17,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:49:17,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 22:49:17,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:49:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:49:17,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:49:17,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:49:17,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337329605] [2022-02-23 22:49:17,756 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:49:17,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156074005] [2022-02-23 22:49:17,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156074005] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:49:17,756 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:49:17,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:49:17,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309900982] [2022-02-23 22:49:17,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:49:17,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:49:17,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:49:17,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:49:17,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:49:17,758 INFO L87 Difference]: Start difference. First operand 203 states and 287 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:49:17,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:49:17,817 INFO L93 Difference]: Finished difference Result 258 states and 362 transitions. [2022-02-23 22:49:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 22:49:17,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-02-23 22:49:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:49:17,820 INFO L225 Difference]: With dead ends: 258 [2022-02-23 22:49:17,820 INFO L226 Difference]: Without dead ends: 168 [2022-02-23 22:49:17,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-23 22:49:17,824 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:49:17,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:49:17,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-23 22:49:17,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2022-02-23 22:49:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 89 states have internal predecessors, (100), 45 states have call successors, (45), 11 states have call predecessors, (45), 10 states have return successors, (43), 39 states have call predecessors, (43), 43 states have call successors, (43) [2022-02-23 22:49:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 188 transitions. [2022-02-23 22:49:17,841 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 188 transitions. Word has length 47 [2022-02-23 22:49:17,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:49:17,841 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 188 transitions. [2022-02-23 22:49:17,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:49:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 188 transitions. [2022-02-23 22:49:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-23 22:49:17,842 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:49:17,842 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:49:17,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 22:49:18,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-23 22:49:18,058 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:49:18,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:49:18,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-02-23 22:49:18,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:49:18,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567772497] [2022-02-23 22:49:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:18,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:49:18,065 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:49:18,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011943358] [2022-02-23 22:49:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:18,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:18,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:49:18,067 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:49:18,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 22:49:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:18,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:49:18,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:49:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-23 22:49:18,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:49:18,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:49:18,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567772497] [2022-02-23 22:49:18,179 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:49:18,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011943358] [2022-02-23 22:49:18,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011943358] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:49:18,180 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:49:18,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:49:18,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437556011] [2022-02-23 22:49:18,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:49:18,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:49:18,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:49:18,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:49:18,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:49:18,181 INFO L87 Difference]: Start difference. First operand 140 states and 188 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-23 22:49:18,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:49:18,225 INFO L93 Difference]: Finished difference Result 198 states and 283 transitions. [2022-02-23 22:49:18,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:49:18,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-02-23 22:49:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:49:18,226 INFO L225 Difference]: With dead ends: 198 [2022-02-23 22:49:18,226 INFO L226 Difference]: Without dead ends: 196 [2022-02-23 22:49:18,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:49:18,227 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:49:18,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:49:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-02-23 22:49:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 174. [2022-02-23 22:49:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 91 states have (on average 1.1758241758241759) internal successors, (107), 100 states have internal predecessors, (107), 71 states have call successors, (71), 12 states have call predecessors, (71), 11 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2022-02-23 22:49:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 247 transitions. [2022-02-23 22:49:18,247 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 247 transitions. Word has length 52 [2022-02-23 22:49:18,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:49:18,247 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 247 transitions. [2022-02-23 22:49:18,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-23 22:49:18,247 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 247 transitions. [2022-02-23 22:49:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-23 22:49:18,247 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:49:18,248 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:49:18,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 22:49:18,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-23 22:49:18,464 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:49:18,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:49:18,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-02-23 22:49:18,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:49:18,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211518769] [2022-02-23 22:49:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:18,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:49:18,471 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:49:18,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328020705] [2022-02-23 22:49:18,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:18,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:18,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:49:18,473 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:49:18,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 22:49:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:18,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 50 conjunts are in the unsatisfiable core [2022-02-23 22:49:18,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:49:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-02-23 22:49:18,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:49:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-02-23 22:49:19,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:49:19,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211518769] [2022-02-23 22:49:19,422 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:49:19,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328020705] [2022-02-23 22:49:19,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328020705] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:49:19,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:49:19,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-02-23 22:49:19,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089964472] [2022-02-23 22:49:19,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:49:19,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-23 22:49:19,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:49:19,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-23 22:49:19,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-23 22:49:19,423 INFO L87 Difference]: Start difference. First operand 174 states and 247 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-23 22:49:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:49:25,056 INFO L93 Difference]: Finished difference Result 337 states and 496 transitions. [2022-02-23 22:49:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-23 22:49:25,057 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 64 [2022-02-23 22:49:25,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:49:25,059 INFO L225 Difference]: With dead ends: 337 [2022-02-23 22:49:25,059 INFO L226 Difference]: Without dead ends: 333 [2022-02-23 22:49:25,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-02-23 22:49:25,060 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 130 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-23 22:49:25,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 554 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-02-23 22:49:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-02-23 22:49:25,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 273. [2022-02-23 22:49:25,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 158 states have (on average 1.2025316455696202) internal successors, (190), 166 states have internal predecessors, (190), 99 states have call successors, (99), 16 states have call predecessors, (99), 15 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2022-02-23 22:49:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 386 transitions. [2022-02-23 22:49:25,107 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 386 transitions. Word has length 64 [2022-02-23 22:49:25,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:49:25,108 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 386 transitions. [2022-02-23 22:49:25,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-23 22:49:25,108 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 386 transitions. [2022-02-23 22:49:25,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-23 22:49:25,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:49:25,109 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2022-02-23 22:49:25,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 22:49:25,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 22:49:25,323 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:49:25,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:49:25,324 INFO L85 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2022-02-23 22:49:25,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:49:25,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537885044] [2022-02-23 22:49:25,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:25,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:49:25,330 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:49:25,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907686689] [2022-02-23 22:49:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:25,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:25,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:49:25,332 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:49:25,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 22:49:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:25,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-23 22:49:25,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:49:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-02-23 22:49:25,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:49:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-02-23 22:49:25,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:49:25,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537885044] [2022-02-23 22:49:25,907 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:49:25,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907686689] [2022-02-23 22:49:25,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907686689] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 22:49:25,907 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:49:25,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 14 [2022-02-23 22:49:25,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665912737] [2022-02-23 22:49:25,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:49:25,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 22:49:25,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:49:25,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 22:49:25,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-02-23 22:49:25,908 INFO L87 Difference]: Start difference. First operand 273 states and 386 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-02-23 22:49:26,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:49:26,003 INFO L93 Difference]: Finished difference Result 279 states and 391 transitions. [2022-02-23 22:49:26,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:49:26,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2022-02-23 22:49:26,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:49:26,005 INFO L225 Difference]: With dead ends: 279 [2022-02-23 22:49:26,005 INFO L226 Difference]: Without dead ends: 277 [2022-02-23 22:49:26,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-02-23 22:49:26,006 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:49:26,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 145 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:49:26,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-02-23 22:49:26,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-02-23 22:49:26,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 161 states have (on average 1.1987577639751552) internal successors, (193), 169 states have internal predecessors, (193), 99 states have call successors, (99), 17 states have call predecessors, (99), 16 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2022-02-23 22:49:26,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 389 transitions. [2022-02-23 22:49:26,054 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 389 transitions. Word has length 74 [2022-02-23 22:49:26,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:49:26,054 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 389 transitions. [2022-02-23 22:49:26,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-02-23 22:49:26,054 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 389 transitions. [2022-02-23 22:49:26,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-23 22:49:26,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:49:26,055 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-23 22:49:26,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 22:49:26,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-23 22:49:26,264 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:49:26,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:49:26,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2022-02-23 22:49:26,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:49:26,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478356620] [2022-02-23 22:49:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:26,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:49:26,275 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:49:26,275 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60415688] [2022-02-23 22:49:26,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:26,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:26,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:49:26,276 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:49:26,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 22:49:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:26,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-23 22:49:26,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:49:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-02-23 22:49:26,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:49:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-02-23 22:49:26,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:49:26,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478356620] [2022-02-23 22:49:26,705 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:49:26,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60415688] [2022-02-23 22:49:26,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60415688] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:49:26,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:49:26,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-02-23 22:49:26,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919997444] [2022-02-23 22:49:26,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:49:26,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-23 22:49:26,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:49:26,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-23 22:49:26,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-23 22:49:26,706 INFO L87 Difference]: Start difference. First operand 277 states and 389 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-23 22:49:27,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:49:27,028 INFO L93 Difference]: Finished difference Result 319 states and 450 transitions. [2022-02-23 22:49:27,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 22:49:27,028 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2022-02-23 22:49:27,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:49:27,030 INFO L225 Difference]: With dead ends: 319 [2022-02-23 22:49:27,030 INFO L226 Difference]: Without dead ends: 317 [2022-02-23 22:49:27,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-02-23 22:49:27,030 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:49:27,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 261 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 22:49:27,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-02-23 22:49:27,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 281. [2022-02-23 22:49:27,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 164 states have (on average 1.1951219512195121) internal successors, (196), 172 states have internal predecessors, (196), 99 states have call successors, (99), 18 states have call predecessors, (99), 17 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2022-02-23 22:49:27,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 392 transitions. [2022-02-23 22:49:27,090 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 392 transitions. Word has length 72 [2022-02-23 22:49:27,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:49:27,090 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 392 transitions. [2022-02-23 22:49:27,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-23 22:49:27,090 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 392 transitions. [2022-02-23 22:49:27,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-23 22:49:27,095 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:49:27,095 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 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] [2022-02-23 22:49:27,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-23 22:49:27,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 22:49:27,303 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:49:27,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:49:27,304 INFO L85 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2022-02-23 22:49:27,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:49:27,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624028122] [2022-02-23 22:49:27,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:27,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:49:27,317 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:49:27,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95970795] [2022-02-23 22:49:27,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:49:27,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:27,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:49:27,318 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:49:27,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 22:49:27,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 22:49:27,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:49:27,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 22:49:27,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:49:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 22:49:27,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:49:27,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:49:27,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624028122] [2022-02-23 22:49:27,439 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:49:27,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95970795] [2022-02-23 22:49:27,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95970795] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:49:27,439 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:49:27,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:49:27,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694479057] [2022-02-23 22:49:27,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:49:27,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:49:27,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:49:27,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:49:27,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:49:27,440 INFO L87 Difference]: Start difference. First operand 281 states and 392 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-02-23 22:49:27,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:49:27,517 INFO L93 Difference]: Finished difference Result 489 states and 678 transitions. [2022-02-23 22:49:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 22:49:27,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-02-23 22:49:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:49:27,519 INFO L225 Difference]: With dead ends: 489 [2022-02-23 22:49:27,519 INFO L226 Difference]: Without dead ends: 294 [2022-02-23 22:49:27,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:49:27,520 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:49:27,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:49:27,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-02-23 22:49:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 279. [2022-02-23 22:49:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 170 states have (on average 1.188235294117647) internal successors, (202), 171 states have internal predecessors, (202), 91 states have call successors, (91), 18 states have call predecessors, (91), 17 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2022-02-23 22:49:27,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 382 transitions. [2022-02-23 22:49:27,564 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 382 transitions. Word has length 77 [2022-02-23 22:49:27,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:49:27,565 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 382 transitions. [2022-02-23 22:49:27,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-02-23 22:49:27,565 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 382 transitions. [2022-02-23 22:49:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-23 22:49:27,565 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:49:27,565 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:49:27,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-23 22:49:27,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 22:49:27,766 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:49:27,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:49:27,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 3 times [2022-02-23 22:49:27,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:49:27,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655320182] [2022-02-23 22:49:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:27,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:49:27,773 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:49:27,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29863655] [2022-02-23 22:49:27,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 22:49:27,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:27,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:49:27,774 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:49:27,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-23 22:49:27,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-23 22:49:27,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:49:27,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 60 conjunts are in the unsatisfiable core [2022-02-23 22:49:27,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:49:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-02-23 22:49:28,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:49:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-02-23 22:49:29,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:49:29,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655320182] [2022-02-23 22:49:29,715 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:49:29,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29863655] [2022-02-23 22:49:29,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29863655] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:49:29,716 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:49:29,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-02-23 22:49:29,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092437750] [2022-02-23 22:49:29,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:49:29,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 22:49:29,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:49:29,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 22:49:29,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-02-23 22:49:29,717 INFO L87 Difference]: Start difference. First operand 279 states and 382 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-02-23 22:49:40,604 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:49:51,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:49:51,507 INFO L93 Difference]: Finished difference Result 421 states and 574 transitions. [2022-02-23 22:49:51,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-23 22:49:51,507 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 77 [2022-02-23 22:49:51,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:49:51,521 INFO L225 Difference]: With dead ends: 421 [2022-02-23 22:49:51,521 INFO L226 Difference]: Without dead ends: 419 [2022-02-23 22:49:51,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=692, Invalid=2388, Unknown=0, NotChecked=0, Total=3080 [2022-02-23 22:49:51,522 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 228 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 375 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-02-23 22:49:51,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 646 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 1031 Invalid, 1 Unknown, 0 Unchecked, 9.7s Time] [2022-02-23 22:49:51,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-02-23 22:49:51,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 357. [2022-02-23 22:49:51,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 219 states have (on average 1.187214611872146) internal successors, (260), 220 states have internal predecessors, (260), 115 states have call successors, (115), 23 states have call predecessors, (115), 22 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-02-23 22:49:51,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 488 transitions. [2022-02-23 22:49:51,619 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 488 transitions. Word has length 77 [2022-02-23 22:49:51,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:49:51,619 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 488 transitions. [2022-02-23 22:49:51,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-02-23 22:49:51,619 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 488 transitions. [2022-02-23 22:49:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-23 22:49:51,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:49:51,620 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:49:51,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-23 22:49:51,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:51,821 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:49:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:49:51,821 INFO L85 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 1 times [2022-02-23 22:49:51,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:49:51,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807020988] [2022-02-23 22:49:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:51,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:49:51,827 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:49:51,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662260462] [2022-02-23 22:49:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:51,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:51,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:49:51,833 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:49:51,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-23 22:49:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:49:51,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 87 conjunts are in the unsatisfiable core [2022-02-23 22:49:51,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:49:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-02-23 22:49:52,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:49:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-02-23 22:49:54,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:49:54,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807020988] [2022-02-23 22:49:54,097 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:49:54,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662260462] [2022-02-23 22:49:54,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662260462] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:49:54,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:49:54,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2022-02-23 22:49:54,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337119245] [2022-02-23 22:49:54,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:49:54,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-23 22:49:54,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:49:54,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-23 22:49:54,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-02-23 22:49:54,099 INFO L87 Difference]: Start difference. First operand 357 states and 488 transitions. Second operand has 27 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-02-23 22:50:01,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:50:03,690 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:50:09,691 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:50:13,036 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:50:16,283 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:50:18,294 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:50:20,297 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:50:22,788 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:50:29,177 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:50:37,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:50:40,586 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:50:42,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:50:44,928 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:50:50,414 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:50:52,039 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:50:54,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:50:56,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:00,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:02,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:05,446 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:07,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:10,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:12,229 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:14,822 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:16,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:18,801 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:20,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:22,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:22,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:51:22,238 INFO L93 Difference]: Finished difference Result 621 states and 894 transitions. [2022-02-23 22:51:22,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-23 22:51:22,238 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) Word has length 91 [2022-02-23 22:51:22,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:51:22,241 INFO L225 Difference]: With dead ends: 621 [2022-02-23 22:51:22,241 INFO L226 Difference]: Without dead ends: 617 [2022-02-23 22:51:22,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3045 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=1730, Invalid=7776, Unknown=0, NotChecked=0, Total=9506 [2022-02-23 22:51:22,259 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 190 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 448 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.6s IncrementalHoareTripleChecker+Time [2022-02-23 22:51:22,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 759 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 1784 Invalid, 22 Unknown, 0 Unchecked, 67.6s Time] [2022-02-23 22:51:22,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-02-23 22:51:22,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 532. [2022-02-23 22:51:22,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 301 states have (on average 1.2259136212624584) internal successors, (369), 302 states have internal predecessors, (369), 203 states have call successors, (203), 28 states have call predecessors, (203), 27 states have return successors, (201), 201 states have call predecessors, (201), 201 states have call successors, (201) [2022-02-23 22:51:22,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 773 transitions. [2022-02-23 22:51:22,428 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 773 transitions. Word has length 91 [2022-02-23 22:51:22,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:51:22,428 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 773 transitions. [2022-02-23 22:51:22,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-02-23 22:51:22,429 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 773 transitions. [2022-02-23 22:51:22,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-23 22:51:22,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:51:22,430 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 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, 1] [2022-02-23 22:51:22,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-23 22:51:22,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-23 22:51:22,646 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:51:22,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:51:22,646 INFO L85 PathProgramCache]: Analyzing trace with hash 736682115, now seen corresponding path program 1 times [2022-02-23 22:51:22,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:51:22,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538626949] [2022-02-23 22:51:22,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:51:22,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:51:22,652 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:51:22,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48846926] [2022-02-23 22:51:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:51:22,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:51:22,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:51:22,656 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:51:22,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-23 22:51:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:51:22,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-23 22:51:22,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:51:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-02-23 22:51:23,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:51:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-02-23 22:51:23,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:51:23,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538626949] [2022-02-23 22:51:23,515 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:51:23,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48846926] [2022-02-23 22:51:23,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48846926] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:51:23,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:51:23,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2022-02-23 22:51:23,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95010156] [2022-02-23 22:51:23,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:51:23,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-23 22:51:23,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:51:23,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-23 22:51:23,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-02-23 22:51:23,517 INFO L87 Difference]: Start difference. First operand 532 states and 773 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-02-23 22:51:26,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:51:26,736 INFO L93 Difference]: Finished difference Result 835 states and 1274 transitions. [2022-02-23 22:51:26,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-23 22:51:26,737 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 94 [2022-02-23 22:51:26,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:51:26,741 INFO L225 Difference]: With dead ends: 835 [2022-02-23 22:51:26,741 INFO L226 Difference]: Without dead ends: 833 [2022-02-23 22:51:26,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=472, Invalid=1689, Unknown=1, NotChecked=0, Total=2162 [2022-02-23 22:51:26,743 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 131 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-23 22:51:26,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 758 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 633 Invalid, 0 Unknown, 103 Unchecked, 1.7s Time] [2022-02-23 22:51:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-02-23 22:51:27,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 795. [2022-02-23 22:51:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 410 states have (on average 1.2804878048780488) internal successors, (525), 411 states have internal predecessors, (525), 355 states have call successors, (355), 30 states have call predecessors, (355), 29 states have return successors, (353), 353 states have call predecessors, (353), 353 states have call successors, (353) [2022-02-23 22:51:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1233 transitions. [2022-02-23 22:51:27,051 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1233 transitions. Word has length 94 [2022-02-23 22:51:27,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:51:27,052 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 1233 transitions. [2022-02-23 22:51:27,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-02-23 22:51:27,052 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1233 transitions. [2022-02-23 22:51:27,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-23 22:51:27,053 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:51:27,053 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:51:27,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-02-23 22:51:27,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-23 22:51:27,271 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:51:27,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:51:27,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1867259133, now seen corresponding path program 1 times [2022-02-23 22:51:27,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:51:27,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731874420] [2022-02-23 22:51:27,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:51:27,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:51:27,278 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:51:27,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411704409] [2022-02-23 22:51:27,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:51:27,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:51:27,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:51:27,279 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:51:27,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-23 22:51:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:51:27,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 54 conjunts are in the unsatisfiable core [2022-02-23 22:51:27,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:51:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-02-23 22:51:28,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:51:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 19 proven. 43 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-23 22:51:31,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:51:31,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731874420] [2022-02-23 22:51:31,043 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:51:31,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411704409] [2022-02-23 22:51:31,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411704409] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:51:31,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:51:31,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 28 [2022-02-23 22:51:31,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075621278] [2022-02-23 22:51:31,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:51:31,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-23 22:51:31,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:51:31,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-23 22:51:31,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-02-23 22:51:31,045 INFO L87 Difference]: Start difference. First operand 795 states and 1233 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) [2022-02-23 22:51:36,617 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:41,069 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:43,072 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:45,074 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:52,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:51:52,824 INFO L93 Difference]: Finished difference Result 961 states and 1487 transitions. [2022-02-23 22:51:52,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-23 22:51:52,825 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) Word has length 94 [2022-02-23 22:51:52,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:51:52,829 INFO L225 Difference]: With dead ends: 961 [2022-02-23 22:51:52,829 INFO L226 Difference]: Without dead ends: 959 [2022-02-23 22:51:52,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=783, Invalid=2757, Unknown=0, NotChecked=0, Total=3540 [2022-02-23 22:51:52,830 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 190 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 436 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-02-23 22:51:52,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 494 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 1024 Invalid, 4 Unknown, 0 Unchecked, 13.6s Time] [2022-02-23 22:51:52,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-02-23 22:51:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 952. [2022-02-23 22:51:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 501 states have (on average 1.2794411177644711) internal successors, (641), 502 states have internal predecessors, (641), 419 states have call successors, (419), 32 states have call predecessors, (419), 31 states have return successors, (417), 417 states have call predecessors, (417), 417 states have call successors, (417) [2022-02-23 22:51:53,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1477 transitions. [2022-02-23 22:51:53,255 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1477 transitions. Word has length 94 [2022-02-23 22:51:53,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:51:53,255 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 1477 transitions. [2022-02-23 22:51:53,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) [2022-02-23 22:51:53,255 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1477 transitions. [2022-02-23 22:51:53,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-23 22:51:53,256 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:51:53,256 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:51:53,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-23 22:51:53,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-23 22:51:53,459 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:51:53,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:51:53,460 INFO L85 PathProgramCache]: Analyzing trace with hash -464781530, now seen corresponding path program 2 times [2022-02-23 22:51:53,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:51:53,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842377817] [2022-02-23 22:51:53,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:51:53,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:51:53,466 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:51:53,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923999752] [2022-02-23 22:51:53,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:51:53,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:51:53,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:51:53,468 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:51:53,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-23 22:51:53,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 22:51:53,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:51:53,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-23 22:51:53,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:51:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-02-23 22:51:53,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:51:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-02-23 22:51:53,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:51:53,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842377817] [2022-02-23 22:51:53,827 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:51:53,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923999752] [2022-02-23 22:51:53,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923999752] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:51:53,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:51:53,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-02-23 22:51:53,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019766493] [2022-02-23 22:51:53,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:51:53,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 22:51:53,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:51:53,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 22:51:53,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-02-23 22:51:53,829 INFO L87 Difference]: Start difference. First operand 952 states and 1477 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-23 22:51:54,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:51:54,700 INFO L93 Difference]: Finished difference Result 1092 states and 1686 transitions. [2022-02-23 22:51:54,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-23 22:51:54,701 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 99 [2022-02-23 22:51:54,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:51:54,705 INFO L225 Difference]: With dead ends: 1092 [2022-02-23 22:51:54,705 INFO L226 Difference]: Without dead ends: 1085 [2022-02-23 22:51:54,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-02-23 22:51:54,706 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 65 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:51:54,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 495 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 22:51:54,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-02-23 22:51:55,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 904. [2022-02-23 22:51:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 465 states have (on average 1.2903225806451613) internal successors, (600), 466 states have internal predecessors, (600), 407 states have call successors, (407), 32 states have call predecessors, (407), 31 states have return successors, (405), 405 states have call predecessors, (405), 405 states have call successors, (405) [2022-02-23 22:51:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1412 transitions. [2022-02-23 22:51:55,102 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1412 transitions. Word has length 99 [2022-02-23 22:51:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:51:55,103 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 1412 transitions. [2022-02-23 22:51:55,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-23 22:51:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1412 transitions. [2022-02-23 22:51:55,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-02-23 22:51:55,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:51:55,104 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:51:55,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-23 22:51:55,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:51:55,313 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:51:55,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:51:55,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1112008279, now seen corresponding path program 2 times [2022-02-23 22:51:55,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:51:55,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540562519] [2022-02-23 22:51:55,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:51:55,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:51:55,321 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:51:55,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078166543] [2022-02-23 22:51:55,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:51:55,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:51:55,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:51:55,324 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:51:55,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-23 22:51:55,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 22:51:55,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:51:55,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 68 conjunts are in the unsatisfiable core [2022-02-23 22:51:55,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:51:56,310 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 22:51:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 90 proven. 42 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-02-23 22:51:56,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:51:57,336 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 22:51:58,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:51:58,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540562519] [2022-02-23 22:51:58,032 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:51:58,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078166543] [2022-02-23 22:51:58,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078166543] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 22:51:58,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:51:58,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-02-23 22:51:58,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389693439] [2022-02-23 22:51:58,032 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 22:51:58,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 22:51:58,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:51:58,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 22:51:58,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-23 22:51:58,033 INFO L87 Difference]: Start difference. First operand 904 states and 1412 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-02-23 22:52:00,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:52:00,100 INFO L93 Difference]: Finished difference Result 1019 states and 1581 transitions. [2022-02-23 22:52:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 22:52:00,101 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 111 [2022-02-23 22:52:00,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:52:00,105 INFO L225 Difference]: With dead ends: 1019 [2022-02-23 22:52:00,105 INFO L226 Difference]: Without dead ends: 1012 [2022-02-23 22:52:00,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-02-23 22:52:00,105 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 47 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:52:00,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 582 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-23 22:52:00,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-02-23 22:52:00,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 1000. [2022-02-23 22:52:00,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 513 states have (on average 1.290448343079922) internal successors, (662), 514 states have internal predecessors, (662), 451 states have call successors, (451), 36 states have call predecessors, (451), 35 states have return successors, (449), 449 states have call predecessors, (449), 449 states have call successors, (449) [2022-02-23 22:52:00,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1562 transitions. [2022-02-23 22:52:00,539 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1562 transitions. Word has length 111 [2022-02-23 22:52:00,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:52:00,539 INFO L470 AbstractCegarLoop]: Abstraction has 1000 states and 1562 transitions. [2022-02-23 22:52:00,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-02-23 22:52:00,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1562 transitions. [2022-02-23 22:52:00,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-23 22:52:00,540 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:52:00,540 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:52:00,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-23 22:52:00,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:52:00,744 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:52:00,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:52:00,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1586140833, now seen corresponding path program 2 times [2022-02-23 22:52:00,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:52:00,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472172179] [2022-02-23 22:52:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:52:00,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:52:00,750 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:52:00,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030400030] [2022-02-23 22:52:00,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:52:00,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:52:00,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:52:00,751 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:52:00,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-23 22:52:00,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 22:52:00,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:52:00,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-23 22:52:00,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:52:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-02-23 22:52:01,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:52:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-02-23 22:52:02,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:52:02,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472172179] [2022-02-23 22:52:02,045 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:52:02,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030400030] [2022-02-23 22:52:02,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030400030] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:52:02,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:52:02,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2022-02-23 22:52:02,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281597035] [2022-02-23 22:52:02,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:52:02,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-23 22:52:02,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:52:02,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-23 22:52:02,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-23 22:52:02,047 INFO L87 Difference]: Start difference. First operand 1000 states and 1562 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 22 states have internal predecessors, (52), 11 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-02-23 22:52:07,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:52:07,739 INFO L93 Difference]: Finished difference Result 1591 states and 2540 transitions. [2022-02-23 22:52:07,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-23 22:52:07,740 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 22 states have internal predecessors, (52), 11 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) Word has length 121 [2022-02-23 22:52:07,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:52:07,745 INFO L225 Difference]: With dead ends: 1591 [2022-02-23 22:52:07,745 INFO L226 Difference]: Without dead ends: 1589 [2022-02-23 22:52:07,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=660, Invalid=2420, Unknown=0, NotChecked=0, Total=3080 [2022-02-23 22:52:07,746 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 146 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-23 22:52:07,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 1030 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 973 Invalid, 0 Unknown, 60 Unchecked, 1.7s Time] [2022-02-23 22:52:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2022-02-23 22:52:08,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1511. [2022-02-23 22:52:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 732 states have (on average 1.330601092896175) internal successors, (974), 733 states have internal predecessors, (974), 739 states have call successors, (739), 40 states have call predecessors, (739), 39 states have return successors, (737), 737 states have call predecessors, (737), 737 states have call successors, (737) [2022-02-23 22:52:08,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 2450 transitions. [2022-02-23 22:52:08,519 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 2450 transitions. Word has length 121 [2022-02-23 22:52:08,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:52:08,519 INFO L470 AbstractCegarLoop]: Abstraction has 1511 states and 2450 transitions. [2022-02-23 22:52:08,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 22 states have internal predecessors, (52), 11 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-02-23 22:52:08,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 2450 transitions. [2022-02-23 22:52:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-23 22:52:08,521 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:52:08,521 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:52:08,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-23 22:52:08,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-02-23 22:52:08,735 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:52:08,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:52:08,736 INFO L85 PathProgramCache]: Analyzing trace with hash -455563815, now seen corresponding path program 3 times [2022-02-23 22:52:08,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:52:08,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972154468] [2022-02-23 22:52:08,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:52:08,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:52:08,741 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:52:08,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840123323] [2022-02-23 22:52:08,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 22:52:08,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:52:08,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:52:08,743 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:52:08,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-23 22:52:08,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 22:52:08,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:52:08,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 73 conjunts are in the unsatisfiable core [2022-02-23 22:52:08,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:52:09,298 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 22:52:09,299 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 22:52:46,151 WARN L232 SmtUtils]: Spent 23.95s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 22:53:21,290 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 22:53:21,293 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 22:53:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 102 proven. 28 refuted. 2 times theorem prover too weak. 276 trivial. 0 not checked. [2022-02-23 22:53:24,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:53:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 90 proven. 30 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-02-23 22:53:40,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:53:40,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972154468] [2022-02-23 22:53:40,096 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:53:40,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840123323] [2022-02-23 22:53:40,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840123323] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:53:40,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:53:40,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-02-23 22:53:40,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376059400] [2022-02-23 22:53:40,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:53:40,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-23 22:53:40,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:53:40,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-23 22:53:40,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=425, Unknown=7, NotChecked=0, Total=506 [2022-02-23 22:53:40,097 INFO L87 Difference]: Start difference. First operand 1511 states and 2450 transitions. Second operand has 23 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2022-02-23 22:53:44,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:53:47,501 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:53:59,794 WARN L232 SmtUtils]: Spent 11.88s on a formula simplification. DAG size of input: 63 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 22:54:33,372 WARN L232 SmtUtils]: Spent 31.40s on a formula simplification. DAG size of input: 77 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 22:54:50,332 WARN L232 SmtUtils]: Spent 12.30s on a formula simplification. DAG size of input: 104 DAG size of output: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 22:54:51,425 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:54:55,697 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:54:58,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:54:59,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:55:02,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:55:03,145 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:55:05,241 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:55:06,932 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:55:08,342 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:55:11,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:55:11,519 INFO L93 Difference]: Finished difference Result 1705 states and 2760 transitions. [2022-02-23 22:55:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-23 22:55:11,521 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) Word has length 121 [2022-02-23 22:55:11,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:55:11,527 INFO L225 Difference]: With dead ends: 1705 [2022-02-23 22:55:11,527 INFO L226 Difference]: Without dead ends: 1701 [2022-02-23 22:55:11,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 216 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 106.2s TimeCoverageRelationStatistics Valid=334, Invalid=1380, Unknown=8, NotChecked=0, Total=1722 [2022-02-23 22:55:11,528 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 131 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 285 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.8s IncrementalHoareTripleChecker+Time [2022-02-23 22:55:11,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 535 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 596 Invalid, 3 Unknown, 0 Unchecked, 26.8s Time] [2022-02-23 22:55:11,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2022-02-23 22:55:12,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1513. [2022-02-23 22:55:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 734 states have (on average 1.3283378746594006) internal successors, (975), 734 states have internal predecessors, (975), 739 states have call successors, (739), 41 states have call predecessors, (739), 39 states have return successors, (737), 737 states have call predecessors, (737), 737 states have call successors, (737) [2022-02-23 22:55:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 2451 transitions. [2022-02-23 22:55:12,375 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 2451 transitions. Word has length 121 [2022-02-23 22:55:12,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:55:12,377 INFO L470 AbstractCegarLoop]: Abstraction has 1513 states and 2451 transitions. [2022-02-23 22:55:12,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2022-02-23 22:55:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 2451 transitions. [2022-02-23 22:55:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-02-23 22:55:12,378 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:55:12,379 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1] [2022-02-23 22:55:12,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-23 22:55:12,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-02-23 22:55:12,595 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:55:12,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:55:12,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1630901606, now seen corresponding path program 3 times [2022-02-23 22:55:12,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:55:12,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955065854] [2022-02-23 22:55:12,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:55:12,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:55:12,601 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:55:12,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132529348] [2022-02-23 22:55:12,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 22:55:12,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:55:12,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:55:12,602 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:55:12,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-23 22:55:12,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-23 22:55:12,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:55:12,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 76 conjunts are in the unsatisfiable core [2022-02-23 22:55:12,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:55:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 152 proven. 45 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2022-02-23 22:55:15,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:55:18,879 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 22:57:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 140 proven. 48 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-02-23 22:57:04,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:57:04,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955065854] [2022-02-23 22:57:04,582 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:57:04,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132529348] [2022-02-23 22:57:04,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132529348] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:57:04,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:57:04,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 35 [2022-02-23 22:57:04,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847066854] [2022-02-23 22:57:04,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:57:04,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-23 22:57:04,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:57:04,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-23 22:57:04,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=961, Unknown=3, NotChecked=0, Total=1190 [2022-02-23 22:57:04,583 INFO L87 Difference]: Start difference. First operand 1513 states and 2451 transitions. Second operand has 35 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 13 states have call predecessors, (33), 10 states have call successors, (33) [2022-02-23 22:58:18,850 WARN L232 SmtUtils]: Spent 1.13m on a formula simplification that was a NOOP. DAG size: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 22:58:22,714 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:58:24,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:58:45,180 WARN L232 SmtUtils]: Spent 14.40s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 22:58:47,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:59:40,510 WARN L232 SmtUtils]: Spent 47.63s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 22:59:42,516 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:59:44,216 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:59:46,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:59:48,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:59:51,418 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:59:54,046 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:59:56,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:59:59,486 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:00:02,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:00:04,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:00:08,211 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:00:10,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:00:12,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:00:47,166 WARN L232 SmtUtils]: Spent 31.52s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:00:49,842 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:01:23,535 WARN L232 SmtUtils]: Spent 21.39s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:01:25,068 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:01:27,767 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:02:19,914 WARN L232 SmtUtils]: Spent 43.63s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 23:02:21,917 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:02:23,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:02:25,926 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:02:27,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:02:30,080 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:02:32,084 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:02:34,087 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:02:36,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []